2024年2月25日发(作者：望梦玉)
19-4464; Rev 0; 2/09EVALUATION
KITAVAILABLE24-Channel Automotive Switch MonitorGeneral DescriptionFeaturesThe MAX13362 is a 24-channel automotive contact mon-itor designed as an interface between mechanical♦9V to 18V Operating Voltage Range with Fullswitches and low-voltage processors or other logic cir-Performancecuits. The IC operates over a voltage range of 5.5V to♦Fully Functional Range of 5.5V to 28V28V, and withstands voltages up to 40V. It protects low-voltage circuitry from high voltages and reverse battery♦Switch Inputs Withstand 27Vconditions. The MAX13362’s low-current operation under♦Switch Inputs Withstand Reverse Batteryall operating conditions makes it suitable for use in elec-♦Ultra-Low Operating Current 100µA (typ) in Scantronic control units (ECUs) that are connected directly toModethe automotive battery. It has an adjustable scan modethat significantly reduces the current drawn in key-off.♦Built-In Switching HysteresisThe MAX13362 features an SPI™ interface to monitor♦Built-In Switch Deglitchingthe switch status and set the device configuration.♦CMOS-Compatible Logic Outputs Down to 3.0VMultiple MAX13362s can be cascaded to support anymultiple of 24 switches.♦Interrupt Output to ProcessorThe MAX13362 is available in a 6mm x 6mm, 40-pin♦Configurable Wetting Current (0mA, 5mA, 10mA,thin QFN package and operates over the -40°C toor 15mA) for Each Switch Input+125°C temperature range.♦AEC-Q100 QualifiedApplicationsOrdering InformationAutomotive Body ControllersPARTTEMP RANGEPIN-PACKAGEAutomotive Door ModulesAutomotive Smart Junction BoxesM AX 13362ATL/V + -40°C to +125°C40 Thin QFN-EP*(6mm x 6mm)*EP = Exposed pad.+Denotes a lead(Pb)-free/RoHS-compliant package./V Denotes an automotive qualified l Application CircuitPin ConfigurationTOP VIEW..CC6543210..NNNNNNNNNDBATTERYIIIIIIIS24 SWITCHES, 1 BATTERY-CONNECTED9V TO 18V22222222ECU CONNECTORIN73120VSIN83219VS0.047μF0.047μFIN93318GND100ΩIN103417VDDIN1135MAX1336216GND32154321111NNNNN111NNNNNNNNNNNNNNNNIIIIIIIIIIIIIIINNNIIIIIIIIIIN123615SDIVSININ133714CSREGULATORMAX13362OUTIN143813SDOVDDIN153912CLKGNDSDISDOCLKCSINTSDIN1640+11N.C.MICROCONTROLLER/LOGIC CIRCUIT..CC7890123T..1112222NNNNNNNNNNIIIIIIIITHIN QFNSPI is a trademark of Motorola, Inc.(6mm x 6mm)________________________________________________________________Maxim Integrated Products1For pricing, delivery, and ordering information,please contact Maxim Directat 1-888-629-4642,or visit Maxim’s website at :///MAX13362
24-Channel Automotive Switch MonitorMAX13362ABSOLUTE MAXIMUM RATINGVDD, CLK, SDI, -0.3V to +6VVS, SD, -0.3V to +40VIN0–IN23 -15V to +27VSDO -0.3V to (VDD+ 0.3V)ESD Protection, All Pins (HBM)............................................±2kVESD Protection on Pins IN0–IN23 to IEC 61000-4-2 Specification(with added 0.047µF capacitor, and/or 100Ωresistor)....±8kVCurrent Into .±20mAContinuous Power Dissipation (TA= +70°C)(derate 37mW/°C above +70°C)(multilayer board)....2963mWOperating -40°C to +125°-40°C to +150°CStorage -65°C to +150°CLead Temperature (soldering, 10s).................................+300°CStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device ICAL CHARACTERISTICS(VDD
= 5V, VVS= 14V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=+25°C.)PARAMETERPOWER SUPPLYVDD Operating Supply RangeVDD Supply CurrentVS Supply RangeVS Undervoltage LockoutVDDIDDVVSVUVLOtPOLL = 64ms, tPOLL_ACT = 1ms; LP bit ininternal register = 0, 24 channels active, allswitches open, TA = +25°CTotal Supply Current (Flowinginto VS and VDD)ISUPtPOLL = 64ms, tPOLL_ACT = 1ms; LP bit ininternal register = 0, 24 channels active, allswitches openContinuous polling mode, wetting currentset to 5mAVS Supply Current in ShutdownModeVDD Supply Current in ShutdownModeSWITCH INPUTSInput Voltage ThresholdInput HysteresisWetting Current Rise/Fall TimeVTHVHtIWETTWetting current set to 15mA, V<
VS < 18V 9V
Wetting current set to 15mA, V<
VS < 9V) or (18V < VVS 28V)< (5.5V
VIN_ = 0, TA = +25°CVIN_ = 14V, TA = +25°C (Note 2)VVS = 0 or 14V, VSD = 0, TA = +25°CIWETT = 15mA (Note 3)2.81612.710.5VVS = 5.5V to 28V, measured with 100Ωseries resistor for high-side switchesVVS = 5.5V to 28V, measured with 100Ωseries resistor for high-side switches2.50.25151517.25mA19.5230±24.0µAµAV3.7VVµsISDVSISDVDDVSD = 0, VVS = 14V, all switches open, TA =+25°CVSD = 0, VVS = 14V, TA = +25°C(Note 1)5.5310030.15.510285.5170VµAVVSYMBOLCONDITIONSMINTYPMAXUNITS100200µA100060.1105µAµAWetting CurrentIWETTIN0–IN23 Input CurrentIN0–IN23 Input Leakage Currentin ShutdownIN4–IN23 Dropout VoltageIIN_ILEAKSDVDO152_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorELECTRICAL CHARACTERISTICS (continued)(VDD
= 5V, VVS= 14V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=+25°C.)PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSLOGIC LEVELSINT Output-Voltage LowVOLINTSinking 1mA0.4VSDO Output-Voltage LowVOLSDOSinking 1mA0.2 x VDDVSDO Output-Voltage HighVOHSDOSourcing 1mA0.8 x VDDVSDO Leakage Current in High-Impedance ModeILSDOVCS = 5V-1+1µASDI, CLK, CS Input-Voltage LowVIL0.33 x V
DD
VSDI, CLK, CS Input-Voltage HighVIH0.66 x V
DD
VSD Input Low VoltageVILSD0.8VSD Input High VoltageVIHSD2.4VSDI Internal Pulldown ResistorRPD3050120kΩCLK Pin LeakageILEAKCLKVCLK = 5V, TA = +25°C1µACS Pin LeakageILEAKCSVCS = 5V, TA = +25°C1µASD Pin LeakageILEAKSDVSD = 5V, TA = +25°C1µAINT Pin LeakageILEAKINTVINT = high impedance, TA = +25°C1µATHERMAL SHUTDOWNThermal Shutdown ThresholdTSHDNTemperature rising (Note 4)+150+165°CThermal Shutdown HysteresisTHYST15°CTIMINGSwitch Inputs Deglitching TimetGT375063µsCLK Frequency RangefCLK(Note 4)0.014MHzFalling Edge of CS to RisingEdge of CLK Setup TimetLEADPolling mode, input rise/fall time< 10ns (Note 4)100nsFalling Edge of CLK to RisingEdge of CS Setup TimetLAGInput rise/fall time < 10ns(Note 4)100nsSDI-to-CLK Falling Edge SetupTimetSI(SU)(Note 4)30nsSDI Hold Time After Falling Edgeof CLKtSI(HOLD)(Note 4)20nsTime from Rising Edge of CLK toSDO Data ValidtVALIDCSDO = 50pF (Note 3)70nsTime from Falling Edge of CS toSDO Low ImpedancetSO(EN)(Note 4)55nsTime from Rising Edge of CS toSDO High ImpedancetSDO(DIS)(Note 4)55ns_______________________________________________________________________________________3/MAX13362
24-Channel Automotive Switch MonitorMAX13362ELECTRICAL CHARACTERISTICS (continued)(VDD
= 5V, VVS= 14V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=+25°C.)PARAMETERPolling Active Time AccuracyPolling Time AccuracyTime from Shutdown to NormalOperationSYMBOLtPOLL_ACTtPOLLtSTARTCONDITIONSMIN-20-200.1TYPMAX+20+201UNITS%%msNote 1:When VVSis above 28V, the wetting current is disabled to limit power dissipation, and the switch inputs are not VVSreturns, there is a 1ms blanking time before the external switches are 2:This current only flows during the polling active time thus the average value is much lower. For example with a polling timeof 64ms and a polling active time of 1ms the average current on an input when connected to 14V is typically 16µA x 1/64 =0.25µ 3:Difference between VS and IN_ voltage when wetting current has dropped to 90% of its nominal 4:Guaranteed by DCLKtSI(SU)tSI(HOLD)tLAGSDItSO(EN)MSB INtVALIDtSDO(DIS)SDOMSB OUTLSB OUTFigure 1. SPI Timing Characteristics4_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorTypical Operating Characteristics(VDD
= VSD= 5V, VVS= 14V, TA= +25°C, unless otherwise noted.)MAX13362WETTING CURRENT vs. VS VOLTAGEMAX13362
toc01WETTING CURRENT vs. TEMPERATUREMAX13362
toc02SWITCH STATUS CHANGE(CONTINUOUS MODE)MAX13362 toc032020VIN0IWETT10V0mA0V5mA10V/div5mA/divWETTING
CURRENT
(mA)IWETT = 15mAWETTING
CURRENT
(mA)1515IWETT = 15mA10IWETT = 10mA10IWETT = 10mAVINT2V/div5IWETT = 5mA5IWETT = 5mAVCS2V/div8VS VOLTAGE (V)0-40-2012014010ms/divTEMPERATURE (°C)WETTING CURRENT(POLLING MODE)MAX13362 toc04VS SUPPLY CURRENT vs. TEMPERATURE(CONTINUOUS MODE)IWETT = 15mA FOR ALL CHANNELSMAX13362
toc05VS SUPPLY CURRENT vs. TEMPERATURE(POLLING MODE)POLLING TIME = 65.536msPOLLING ACTIVE TIME = 1.024msALL CHANNELS OPENIWETT = 5mAMAX13362
toc06MAX13362
toc0WETTING
CURRENT
(5mA/div)SUPPLY
CURRENT
(μA)5mA18001400IWETT = 10mA FOR ALL CHANNELSSUPPLY
CURRENT
(μA)120110IWETT = 5mA FOR ALL CHANNELS1000ALL CHANNELS OPEN600IWETT = 0mA FOR ALL CHANNELS2004.096ms POLLING TIME512μs POLLING ACTIVE TIME10090-40-20120140-40-20120140TEMPERATURE (°C)TEMPERATURE (°C)1ms/divVS SUPPLY CURRENT vs. TEMPERATURE(SHUTDOWN MODE)MAX13362
toc07SWITCH THRESHOLD vs. TEMPERATURE(HIGH SIDE SWITCH)MAX13362
toc08SWITCH THRESHOLD vs. TEMPERATURE(LOW-SIDE SWITCH)3.46.53.46.2SUPPLY
CURRENT
(μA)SWITCH
THRESHOLD
(V)SWITCH
THRESHOLD
(V)3.3SWITCH OPEN TO CLOSE3.2SWITCH CLOSE TO OPEN3.3SWITCH OPEN TO CLOSE5.93.25.6SWITCH CLOSE TO OPEN5.33.1HIGH SIDE SWITCH15mA WETTING CURRENT100Ω INCLUDED-40-201201403.1LOW-SIDE SWITCH15mA WETTING CURRENT3.0-40-201201405.0-40-20120140TEMPERATURE (°C)3.0TEMPERATURE (°C)TEMPERATURE (°C)_______________________________________________________________________________________5/
24-Channel Automotive Switch MonitorMAX13362Typical Operating Characteristics (continued)(VDD
= VSD= 5V, VVS= 14V, TA= +25°C, unless otherwise noted.)SWITCH THRESHOLD vs. VS VOLTAGE(LOW-SIDE SWITCH)MAX13362
toc10SWITCH STATUS CHANGE(POLLING MODE)MAX13362 toc113.53.4SWITCH
THRESHOLD
(V)SWITCH OPEN TO CLOSE10VVIN0V5V/div3.33.23.1SWITCH CLOSE TO OPENVINT0V2V/div3.151617182ms/divVS VOLTAGE (V)Pin DescriptionPIN1, 2, 11,29, 17IN18IN19IN20IN21IN22IN23INTCLKSDONo Connection. Not internally Monitor Input Channel 17. Connect IN17 to a ground-connected Monitor Input Channel 18. Connect IN18 to a ground-connected Monitor Input Channel 19. Connect IN19 to a ground-connected Monitor Input Channel 20. Connect IN20 to a ground-connected Monitor Input Channel 21. Connect IN21 to a ground-connected Monitor Input Channel 22. Connect IN22 to a ground-connected Monitor Input Channel 23. Connect IN23 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the ru p t Outp ut. INT i s an op en- d ra i n outp ut that asser ts l ow w hen one or m or e of the i np uts ( IN 0–IN 23)
chang e state and ar e enab le d for i nter r up ts, or w hen the over tem pe r atur e thr eshol d i s exceed ed .SPI Serial Clock InputSPI Serial Data Output. SPI data is output on SDO on the rising edges of CLK while CS is held is high impedance when CS is high. Connect SDO to a microcontroller data input or to asucceeding device in a daisy Chip-Select Input. Drive CS low to enable clocking of data into and out of the IC. SPI data islatched into the device on the rising edge of Serial Data Input. SPI data is latched into the internal shift register on the falling edges of CLKwhile CS is held low. SDI has an internal 50kΩ pulldown resistor. Connect SDI to the SDO of apreceding device in a daisy chain or to the microcontroller data . Pins 16 and 18 must be connected to Supply Voltage. Connect VDD to a 3.3V or 5V logic supply. Bypass VDD to GND with at least a0.1µF capacitor placed as close as possible to ON14CS1516, 1817SDIGNDVDD6_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorPin Description (continued)PINNAMEFUNCTIONSupply Voltage Input. VS should be protected from reverse battery using a series diode. Bypass VS to19, 20VSGND with a 0.1µF ceramic capacitor placed as close as possible to VS. In addition, bypass VS with a47µF or greater capacitor.21SDShutdown Input. Drive SD low to place the IC into shutdown mode. Drive SD high for normal is battery-voltage compatible.22IN0Switch Monitor Input Channel 0. Connect IN0 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.23IN1Switch Monitor Input Channel 1. Connect IN1 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.24IN2Switch Monitor Input Channel 2. Connect IN2 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.25IN3Switch Monitor Input Channel 3. Connect IN3 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.26IN4Switch Monitor Input Channel 4. Connect IN4 to a ground-connected switch.27IN5Switch Monitor Input Channel 5. Connect IN5 to a ground-connected switch.28IN6Switch Monitor Input Channel 6. Connect IN6 to a ground-connected switch.31IN7Switch Monitor Input Channel 7. Connect IN7 to a ground-connected switch.32IN8Switch Monitor Input Channel 8. Connect IN8 to a ground-connected switch.33IN9Switch Monitor Input Channel 9. Connect IN9 to a ground-connected switch.34IN10Switch Monitor Input Channel 10. Connect IN10 to a ground-connected switch.35IN11Switch Monitor Input Channel 11. Connect IN11 to a ground-connected switch.36IN12Switch Monitor Input Channel 12. Connect IN12 to a ground-connected switch.37IN13Switch Monitor Input Channel 13. Connect IN13 to a ground-connected switch.38IN14Switch Monitor Input Channel 14. Connect IN14 to a ground-connected switch.39IN15Switch Monitor Input Channel 15. Connect IN15 to a ground-connected switch.40IN16Switch Monitor Input Channel 16. Connect IN16 to a ground-connected switch.—EPExposed Pad. Connect EP to GND for enhanced thermal performance._______________________________________________________________________________________7/MAX13362
24-Channel Automotive Switch MonitorMAX13362Functional DiagramVSVDDMAX13362IN0IN1IN2IN3IN4IN5IN6IN7IN8IN9IN10IN11IN12IN13IN14IN15IN16IN17IN18IN19IN20IN21IN22IN231 OF 24SDOCSCLKWETTINGCURRENTCONTROLSHIFTREGISTER+CONTROLINTSD24 OF 24SDIREFGENERATORGND8_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorDetailed Descriptionbattery-connected switches by writing to the LH0–LH3The MAX13362 is a 24-channel automotive contactand LH23 bits (see Table 2). The default configurationmonitor designed as an interface between mechanicalof the IN0–IN3 and IN23 inputs after power-up is forswitches and low-voltage microcontrollers or other logicground-connected ts. It features an SPI interface to monitor individualswitch inputs and to configure interrupt capability, wet-Wetting Currentting current, switch configuration (battery-connected orThe MAX13362 applies a programmable wetting currentground-connected), polling time and polling activeto any closed switch to clean switch contacts that aretime. Any switch status change will cause an interruptexposed to adverse conditions. The wetting current forsignal if the switch is interrupt enabled. The MAX13362each switch can be set to 0mA, 5mA, 10mA, or 15mAhas three modes of operation: continuous mode, pollingby the W_.0 and W_.1 data bits in the command regis-mode, and shutdown (see Table 5) by means of an SPI data using wetting current, special care must beVVDDand VStaken to avoid exceeding the maximum power dissipa-tion of the MAX13362 (see the
Applications Informationoutput circuitry. Connect VDDis the power-supply input for the logic input/section). Disabling the wetting current or limiting thesupply. Bypass VDDto a 3V to 5.5V logic-levelDDto GND with at least a 0.1µFactive-wetting current time reduces power consump-capacitor placed as close as possible to . The default state upon power-up is with wettingVS is the main power-supply input. Bypass VS to GNDcurrent a 0.1µF ceramic capacitor placed as close as pos-sible to VS. In addition, bypass VS with a 47µF orInterrupt Output (INT)greater an active-low, open-drain output that asserts lowwhen any of the switch inputs change state and isMechanical Switch Inputs (IN0–IN23)enabled for interrupts, or when the overtemperatureIN0–IN23 are the inputs for remote mechanical switch-threshold is exceeded. An external pullup resistor toes. The switch status is indicated by the S0–S23 bits inVDDis needed on INT. INTis cleared when CSis driventhe status register, and each switch input can be pro-low for a read/write operation. However, in polling mode,grammed to assert an interrupt (INT) by writing to theany switch state change or overtemperature changeIE0–IE23 bits in the command register. All switch inputswhich occurs during an SPI transaction is stored andare interrupt disabled upon an additional interrupt after the SPI transactionisThe IN4–IN22 inputs are intended for ground-connect-over and CSgoes high (shown in Figure 2).ed switches. The IN0–IN3 and IN23 inputs can be pro-If VDDis absent, the INToutput is functional providedgrammed for either ground-connected switches orthat it is pulled up to a different supply CH STATUS CHANGECLKINTNEW INTERRUPTFigure 2. Switch State Change During the SPI transaction_______________________________________________________________________________________9/MAX13362
24-Channel Automotive Switch MonitorMAX13362Serial Peripheral Interface(CS, SDO, SDI, CLK)The MAX13362 operates as a serial peripheral interface(SPI) slave device. An SPI master accesses and pro-grams the MAX13362 by reading/writing the controlregisters. The control registers are 32 bits wide, have 2command bits (or register addresses) and 30 data bits(see Table 1). Figure 3 shows the read/write sequencethrough SPI. The SPI logic counts the number of bitsclocked into the IC (using a modulo-32 counter so thatdaisy chaining is possible) and enables data latchingonly if exactly 32 bits (or an integer multiple thereof)have been clocked RegisterThe status register contains the status of the switchesconnected to IN0–IN23. The status register also con-tains an overtemperature warning bit, a power-on-resetbit and a device type bit (see Table 1). The status reg-ister is accessed by the SPI-compatible DICB0CB1D0D1D2D3D4D5D6D7D8D9D10D11D12D13D14D15D16D17D18D19D20D21D22D23D24D25D26D27D28D29SDOZDTRSTTS0S1S2S3S4S5S6S7S8S9S10S11S12S13S14S15S16S17S18S19S20S21S22S23xxxxxZNOTE: X = UNUSED, Z = HIGH 3. SPI Read/Write SequenceTable 1. Bit DescriptionBIT NAMECB0, CB1D0–D29S0–S23TRSTDTData state bit. 0 = switch open, 1 = switch mperature bit. When overtemperature occurs, this bit is set to 1. It is reset on the rising edge of -on-reset bit. It indicates whether the IC has had a power-on-reset since the last SPI read. 0 = device hasbeen reset. RST is set to 1 on the rising edge of type. 0 = reserved for future use, 1 = DESCRIPTIONCommand bits. Select the internal register to which data bits D0–D29 are to be written.10______________________________________________________________________________________/
分销商库存信息:MAXIMMAX13362ATL/V+TMAX13362ATL/V+
2024年2月25日发(作者：望梦玉)
19-4464; Rev 0; 2/09EVALUATION
KITAVAILABLE24-Channel Automotive Switch MonitorGeneral DescriptionFeaturesThe MAX13362 is a 24-channel automotive contact mon-itor designed as an interface between mechanical♦9V to 18V Operating Voltage Range with Fullswitches and low-voltage processors or other logic cir-Performancecuits. The IC operates over a voltage range of 5.5V to♦Fully Functional Range of 5.5V to 28V28V, and withstands voltages up to 40V. It protects low-voltage circuitry from high voltages and reverse battery♦Switch Inputs Withstand 27Vconditions. The MAX13362’s low-current operation under♦Switch Inputs Withstand Reverse Batteryall operating conditions makes it suitable for use in elec-♦Ultra-Low Operating Current 100µA (typ) in Scantronic control units (ECUs) that are connected directly toModethe automotive battery. It has an adjustable scan modethat significantly reduces the current drawn in key-off.♦Built-In Switching HysteresisThe MAX13362 features an SPI™ interface to monitor♦Built-In Switch Deglitchingthe switch status and set the device configuration.♦CMOS-Compatible Logic Outputs Down to 3.0VMultiple MAX13362s can be cascaded to support anymultiple of 24 switches.♦Interrupt Output to ProcessorThe MAX13362 is available in a 6mm x 6mm, 40-pin♦Configurable Wetting Current (0mA, 5mA, 10mA,thin QFN package and operates over the -40°C toor 15mA) for Each Switch Input+125°C temperature range.♦AEC-Q100 QualifiedApplicationsOrdering InformationAutomotive Body ControllersPARTTEMP RANGEPIN-PACKAGEAutomotive Door ModulesAutomotive Smart Junction BoxesM AX 13362ATL/V + -40°C to +125°C40 Thin QFN-EP*(6mm x 6mm)*EP = Exposed pad.+Denotes a lead(Pb)-free/RoHS-compliant package./V Denotes an automotive qualified l Application CircuitPin ConfigurationTOP VIEW..CC6543210..NNNNNNNNNDBATTERYIIIIIIIS24 SWITCHES, 1 BATTERY-CONNECTED9V TO 18V22222222ECU CONNECTORIN73120VSIN83219VS0.047μF0.047μFIN93318GND100ΩIN103417VDDIN1135MAX1336216GND32154321111NNNNN111NNNNNNNNNNNNNNNNIIIIIIIIIIIIIIINNNIIIIIIIIIIN123615SDIVSININ133714CSREGULATORMAX13362OUTIN143813SDOVDDIN153912CLKGNDSDISDOCLKCSINTSDIN1640+11N.C.MICROCONTROLLER/LOGIC CIRCUIT..CC7890123T..1112222NNNNNNNNNNIIIIIIIITHIN QFNSPI is a trademark of Motorola, Inc.(6mm x 6mm)________________________________________________________________Maxim Integrated Products1For pricing, delivery, and ordering information,please contact Maxim Directat 1-888-629-4642,or visit Maxim’s website at :///MAX13362
24-Channel Automotive Switch MonitorMAX13362ABSOLUTE MAXIMUM RATINGVDD, CLK, SDI, -0.3V to +6VVS, SD, -0.3V to +40VIN0–IN23 -15V to +27VSDO -0.3V to (VDD+ 0.3V)ESD Protection, All Pins (HBM)............................................±2kVESD Protection on Pins IN0–IN23 to IEC 61000-4-2 Specification(with added 0.047µF capacitor, and/or 100Ωresistor)....±8kVCurrent Into .±20mAContinuous Power Dissipation (TA= +70°C)(derate 37mW/°C above +70°C)(multilayer board)....2963mWOperating -40°C to +125°-40°C to +150°CStorage -65°C to +150°CLead Temperature (soldering, 10s).................................+300°CStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device ICAL CHARACTERISTICS(VDD
= 5V, VVS= 14V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=+25°C.)PARAMETERPOWER SUPPLYVDD Operating Supply RangeVDD Supply CurrentVS Supply RangeVS Undervoltage LockoutVDDIDDVVSVUVLOtPOLL = 64ms, tPOLL_ACT = 1ms; LP bit ininternal register = 0, 24 channels active, allswitches open, TA = +25°CTotal Supply Current (Flowinginto VS and VDD)ISUPtPOLL = 64ms, tPOLL_ACT = 1ms; LP bit ininternal register = 0, 24 channels active, allswitches openContinuous polling mode, wetting currentset to 5mAVS Supply Current in ShutdownModeVDD Supply Current in ShutdownModeSWITCH INPUTSInput Voltage ThresholdInput HysteresisWetting Current Rise/Fall TimeVTHVHtIWETTWetting current set to 15mA, V<
VS < 18V 9V
Wetting current set to 15mA, V<
VS < 9V) or (18V < VVS 28V)< (5.5V
VIN_ = 0, TA = +25°CVIN_ = 14V, TA = +25°C (Note 2)VVS = 0 or 14V, VSD = 0, TA = +25°CIWETT = 15mA (Note 3)2.81612.710.5VVS = 5.5V to 28V, measured with 100Ωseries resistor for high-side switchesVVS = 5.5V to 28V, measured with 100Ωseries resistor for high-side switches2.50.25151517.25mA19.5230±24.0µAµAV3.7VVµsISDVSISDVDDVSD = 0, VVS = 14V, all switches open, TA =+25°CVSD = 0, VVS = 14V, TA = +25°C(Note 1)5.5310030.15.510285.5170VµAVVSYMBOLCONDITIONSMINTYPMAXUNITS100200µA100060.1105µAµAWetting CurrentIWETTIN0–IN23 Input CurrentIN0–IN23 Input Leakage Currentin ShutdownIN4–IN23 Dropout VoltageIIN_ILEAKSDVDO152_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorELECTRICAL CHARACTERISTICS (continued)(VDD
= 5V, VVS= 14V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=+25°C.)PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSLOGIC LEVELSINT Output-Voltage LowVOLINTSinking 1mA0.4VSDO Output-Voltage LowVOLSDOSinking 1mA0.2 x VDDVSDO Output-Voltage HighVOHSDOSourcing 1mA0.8 x VDDVSDO Leakage Current in High-Impedance ModeILSDOVCS = 5V-1+1µASDI, CLK, CS Input-Voltage LowVIL0.33 x V
DD
VSDI, CLK, CS Input-Voltage HighVIH0.66 x V
DD
VSD Input Low VoltageVILSD0.8VSD Input High VoltageVIHSD2.4VSDI Internal Pulldown ResistorRPD3050120kΩCLK Pin LeakageILEAKCLKVCLK = 5V, TA = +25°C1µACS Pin LeakageILEAKCSVCS = 5V, TA = +25°C1µASD Pin LeakageILEAKSDVSD = 5V, TA = +25°C1µAINT Pin LeakageILEAKINTVINT = high impedance, TA = +25°C1µATHERMAL SHUTDOWNThermal Shutdown ThresholdTSHDNTemperature rising (Note 4)+150+165°CThermal Shutdown HysteresisTHYST15°CTIMINGSwitch Inputs Deglitching TimetGT375063µsCLK Frequency RangefCLK(Note 4)0.014MHzFalling Edge of CS to RisingEdge of CLK Setup TimetLEADPolling mode, input rise/fall time< 10ns (Note 4)100nsFalling Edge of CLK to RisingEdge of CS Setup TimetLAGInput rise/fall time < 10ns(Note 4)100nsSDI-to-CLK Falling Edge SetupTimetSI(SU)(Note 4)30nsSDI Hold Time After Falling Edgeof CLKtSI(HOLD)(Note 4)20nsTime from Rising Edge of CLK toSDO Data ValidtVALIDCSDO = 50pF (Note 3)70nsTime from Falling Edge of CS toSDO Low ImpedancetSO(EN)(Note 4)55nsTime from Rising Edge of CS toSDO High ImpedancetSDO(DIS)(Note 4)55ns_______________________________________________________________________________________3/MAX13362
24-Channel Automotive Switch MonitorMAX13362ELECTRICAL CHARACTERISTICS (continued)(VDD
= 5V, VVS= 14V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA=+25°C.)PARAMETERPolling Active Time AccuracyPolling Time AccuracyTime from Shutdown to NormalOperationSYMBOLtPOLL_ACTtPOLLtSTARTCONDITIONSMIN-20-200.1TYPMAX+20+201UNITS%%msNote 1:When VVSis above 28V, the wetting current is disabled to limit power dissipation, and the switch inputs are not VVSreturns, there is a 1ms blanking time before the external switches are 2:This current only flows during the polling active time thus the average value is much lower. For example with a polling timeof 64ms and a polling active time of 1ms the average current on an input when connected to 14V is typically 16µA x 1/64 =0.25µ 3:Difference between VS and IN_ voltage when wetting current has dropped to 90% of its nominal 4:Guaranteed by DCLKtSI(SU)tSI(HOLD)tLAGSDItSO(EN)MSB INtVALIDtSDO(DIS)SDOMSB OUTLSB OUTFigure 1. SPI Timing Characteristics4_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorTypical Operating Characteristics(VDD
= VSD= 5V, VVS= 14V, TA= +25°C, unless otherwise noted.)MAX13362WETTING CURRENT vs. VS VOLTAGEMAX13362
toc01WETTING CURRENT vs. TEMPERATUREMAX13362
toc02SWITCH STATUS CHANGE(CONTINUOUS MODE)MAX13362 toc032020VIN0IWETT10V0mA0V5mA10V/div5mA/divWETTING
CURRENT
(mA)IWETT = 15mAWETTING
CURRENT
(mA)1515IWETT = 15mA10IWETT = 10mA10IWETT = 10mAVINT2V/div5IWETT = 5mA5IWETT = 5mAVCS2V/div8VS VOLTAGE (V)0-40-2012014010ms/divTEMPERATURE (°C)WETTING CURRENT(POLLING MODE)MAX13362 toc04VS SUPPLY CURRENT vs. TEMPERATURE(CONTINUOUS MODE)IWETT = 15mA FOR ALL CHANNELSMAX13362
toc05VS SUPPLY CURRENT vs. TEMPERATURE(POLLING MODE)POLLING TIME = 65.536msPOLLING ACTIVE TIME = 1.024msALL CHANNELS OPENIWETT = 5mAMAX13362
toc06MAX13362
toc0WETTING
CURRENT
(5mA/div)SUPPLY
CURRENT
(μA)5mA18001400IWETT = 10mA FOR ALL CHANNELSSUPPLY
CURRENT
(μA)120110IWETT = 5mA FOR ALL CHANNELS1000ALL CHANNELS OPEN600IWETT = 0mA FOR ALL CHANNELS2004.096ms POLLING TIME512μs POLLING ACTIVE TIME10090-40-20120140-40-20120140TEMPERATURE (°C)TEMPERATURE (°C)1ms/divVS SUPPLY CURRENT vs. TEMPERATURE(SHUTDOWN MODE)MAX13362
toc07SWITCH THRESHOLD vs. TEMPERATURE(HIGH SIDE SWITCH)MAX13362
toc08SWITCH THRESHOLD vs. TEMPERATURE(LOW-SIDE SWITCH)3.46.53.46.2SUPPLY
CURRENT
(μA)SWITCH
THRESHOLD
(V)SWITCH
THRESHOLD
(V)3.3SWITCH OPEN TO CLOSE3.2SWITCH CLOSE TO OPEN3.3SWITCH OPEN TO CLOSE5.93.25.6SWITCH CLOSE TO OPEN5.33.1HIGH SIDE SWITCH15mA WETTING CURRENT100Ω INCLUDED-40-201201403.1LOW-SIDE SWITCH15mA WETTING CURRENT3.0-40-201201405.0-40-20120140TEMPERATURE (°C)3.0TEMPERATURE (°C)TEMPERATURE (°C)_______________________________________________________________________________________5/
24-Channel Automotive Switch MonitorMAX13362Typical Operating Characteristics (continued)(VDD
= VSD= 5V, VVS= 14V, TA= +25°C, unless otherwise noted.)SWITCH THRESHOLD vs. VS VOLTAGE(LOW-SIDE SWITCH)MAX13362
toc10SWITCH STATUS CHANGE(POLLING MODE)MAX13362 toc113.53.4SWITCH
THRESHOLD
(V)SWITCH OPEN TO CLOSE10VVIN0V5V/div3.33.23.1SWITCH CLOSE TO OPENVINT0V2V/div3.151617182ms/divVS VOLTAGE (V)Pin DescriptionPIN1, 2, 11,29, 17IN18IN19IN20IN21IN22IN23INTCLKSDONo Connection. Not internally Monitor Input Channel 17. Connect IN17 to a ground-connected Monitor Input Channel 18. Connect IN18 to a ground-connected Monitor Input Channel 19. Connect IN19 to a ground-connected Monitor Input Channel 20. Connect IN20 to a ground-connected Monitor Input Channel 21. Connect IN21 to a ground-connected Monitor Input Channel 22. Connect IN22 to a ground-connected Monitor Input Channel 23. Connect IN23 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the ru p t Outp ut. INT i s an op en- d ra i n outp ut that asser ts l ow w hen one or m or e of the i np uts ( IN 0–IN 23)
chang e state and ar e enab le d for i nter r up ts, or w hen the over tem pe r atur e thr eshol d i s exceed ed .SPI Serial Clock InputSPI Serial Data Output. SPI data is output on SDO on the rising edges of CLK while CS is held is high impedance when CS is high. Connect SDO to a microcontroller data input or to asucceeding device in a daisy Chip-Select Input. Drive CS low to enable clocking of data into and out of the IC. SPI data islatched into the device on the rising edge of Serial Data Input. SPI data is latched into the internal shift register on the falling edges of CLKwhile CS is held low. SDI has an internal 50kΩ pulldown resistor. Connect SDI to the SDO of apreceding device in a daisy chain or to the microcontroller data . Pins 16 and 18 must be connected to Supply Voltage. Connect VDD to a 3.3V or 5V logic supply. Bypass VDD to GND with at least a0.1µF capacitor placed as close as possible to ON14CS1516, 1817SDIGNDVDD6_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorPin Description (continued)PINNAMEFUNCTIONSupply Voltage Input. VS should be protected from reverse battery using a series diode. Bypass VS to19, 20VSGND with a 0.1µF ceramic capacitor placed as close as possible to VS. In addition, bypass VS with a47µF or greater capacitor.21SDShutdown Input. Drive SD low to place the IC into shutdown mode. Drive SD high for normal is battery-voltage compatible.22IN0Switch Monitor Input Channel 0. Connect IN0 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.23IN1Switch Monitor Input Channel 1. Connect IN1 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.24IN2Switch Monitor Input Channel 2. Connect IN2 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.25IN3Switch Monitor Input Channel 3. Connect IN3 to a battery-connected or ground-connected used for a battery-connected switch, add a 100Ω series protection resistor to the input.26IN4Switch Monitor Input Channel 4. Connect IN4 to a ground-connected switch.27IN5Switch Monitor Input Channel 5. Connect IN5 to a ground-connected switch.28IN6Switch Monitor Input Channel 6. Connect IN6 to a ground-connected switch.31IN7Switch Monitor Input Channel 7. Connect IN7 to a ground-connected switch.32IN8Switch Monitor Input Channel 8. Connect IN8 to a ground-connected switch.33IN9Switch Monitor Input Channel 9. Connect IN9 to a ground-connected switch.34IN10Switch Monitor Input Channel 10. Connect IN10 to a ground-connected switch.35IN11Switch Monitor Input Channel 11. Connect IN11 to a ground-connected switch.36IN12Switch Monitor Input Channel 12. Connect IN12 to a ground-connected switch.37IN13Switch Monitor Input Channel 13. Connect IN13 to a ground-connected switch.38IN14Switch Monitor Input Channel 14. Connect IN14 to a ground-connected switch.39IN15Switch Monitor Input Channel 15. Connect IN15 to a ground-connected switch.40IN16Switch Monitor Input Channel 16. Connect IN16 to a ground-connected switch.—EPExposed Pad. Connect EP to GND for enhanced thermal performance._______________________________________________________________________________________7/MAX13362
24-Channel Automotive Switch MonitorMAX13362Functional DiagramVSVDDMAX13362IN0IN1IN2IN3IN4IN5IN6IN7IN8IN9IN10IN11IN12IN13IN14IN15IN16IN17IN18IN19IN20IN21IN22IN231 OF 24SDOCSCLKWETTINGCURRENTCONTROLSHIFTREGISTER+CONTROLINTSD24 OF 24SDIREFGENERATORGND8_______________________________________________________________________________________/
24-Channel Automotive Switch MonitorDetailed Descriptionbattery-connected switches by writing to the LH0–LH3The MAX13362 is a 24-channel automotive contactand LH23 bits (see Table 2). The default configurationmonitor designed as an interface between mechanicalof the IN0–IN3 and IN23 inputs after power-up is forswitches and low-voltage microcontrollers or other logicground-connected ts. It features an SPI interface to monitor individualswitch inputs and to configure interrupt capability, wet-Wetting Currentting current, switch configuration (battery-connected orThe MAX13362 applies a programmable wetting currentground-connected), polling time and polling activeto any closed switch to clean switch contacts that aretime. Any switch status change will cause an interruptexposed to adverse conditions. The wetting current forsignal if the switch is interrupt enabled. The MAX13362each switch can be set to 0mA, 5mA, 10mA, or 15mAhas three modes of operation: continuous mode, pollingby the W_.0 and W_.1 data bits in the command regis-mode, and shutdown (see Table 5) by means of an SPI data using wetting current, special care must beVVDDand VStaken to avoid exceeding the maximum power dissipa-tion of the MAX13362 (see the
Applications Informationoutput circuitry. Connect VDDis the power-supply input for the logic input/section). Disabling the wetting current or limiting thesupply. Bypass VDDto a 3V to 5.5V logic-levelDDto GND with at least a 0.1µFactive-wetting current time reduces power consump-capacitor placed as close as possible to . The default state upon power-up is with wettingVS is the main power-supply input. Bypass VS to GNDcurrent a 0.1µF ceramic capacitor placed as close as pos-sible to VS. In addition, bypass VS with a 47µF orInterrupt Output (INT)greater an active-low, open-drain output that asserts lowwhen any of the switch inputs change state and isMechanical Switch Inputs (IN0–IN23)enabled for interrupts, or when the overtemperatureIN0–IN23 are the inputs for remote mechanical switch-threshold is exceeded. An external pullup resistor toes. The switch status is indicated by the S0–S23 bits inVDDis needed on INT. INTis cleared when CSis driventhe status register, and each switch input can be pro-low for a read/write operation. However, in polling mode,grammed to assert an interrupt (INT) by writing to theany switch state change or overtemperature changeIE0–IE23 bits in the command register. All switch inputswhich occurs during an SPI transaction is stored andare interrupt disabled upon an additional interrupt after the SPI transactionisThe IN4–IN22 inputs are intended for ground-connect-over and CSgoes high (shown in Figure 2).ed switches. The IN0–IN3 and IN23 inputs can be pro-If VDDis absent, the INToutput is functional providedgrammed for either ground-connected switches orthat it is pulled up to a different supply CH STATUS CHANGECLKINTNEW INTERRUPTFigure 2. Switch State Change During the SPI transaction_______________________________________________________________________________________9/MAX13362
24-Channel Automotive Switch MonitorMAX13362Serial Peripheral Interface(CS, SDO, SDI, CLK)The MAX13362 operates as a serial peripheral interface(SPI) slave device. An SPI master accesses and pro-grams the MAX13362 by reading/writing the controlregisters. The control registers are 32 bits wide, have 2command bits (or register addresses) and 30 data bits(see Table 1). Figure 3 shows the read/write sequencethrough SPI. The SPI logic counts the number of bitsclocked into the IC (using a modulo-32 counter so thatdaisy chaining is possible) and enables data latchingonly if exactly 32 bits (or an integer multiple thereof)have been clocked RegisterThe status register contains the status of the switchesconnected to IN0–IN23. The status register also con-tains an overtemperature warning bit, a power-on-resetbit and a device type bit (see Table 1). The status reg-ister is accessed by the SPI-compatible DICB0CB1D0D1D2D3D4D5D6D7D8D9D10D11D12D13D14D15D16D17D18D19D20D21D22D23D24D25D26D27D28D29SDOZDTRSTTS0S1S2S3S4S5S6S7S8S9S10S11S12S13S14S15S16S17S18S19S20S21S22S23xxxxxZNOTE: X = UNUSED, Z = HIGH 3. SPI Read/Write SequenceTable 1. Bit DescriptionBIT NAMECB0, CB1D0–D29S0–S23TRSTDTData state bit. 0 = switch open, 1 = switch mperature bit. When overtemperature occurs, this bit is set to 1. It is reset on the rising edge of -on-reset bit. It indicates whether the IC has had a power-on-reset since the last SPI read. 0 = device hasbeen reset. RST is set to 1 on the rising edge of type. 0 = reserved for future use, 1 = DESCRIPTIONCommand bits. Select the internal register to which data bits D0–D29 are to be written.10______________________________________________________________________________________/
分销商库存信息:MAXIMMAX13362ATL/V+TMAX13362ATL/V+