2024年3月22日发(作者：宓嘉佑)
现货库存、技术资料、百科信息、热点资讯，精彩尽在鼎好!
19-2438; Rev 3; 10/03
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
General DescriptionFeatures
The MAX7301 compact, serial-interfaced I/O expander
(or general-purpose I/O (GPIO) peripheral) provides
♦High-Speed 26MHz SPI-/QSPI-™/MICROWIRE™-
microprocessors with up to 28 ports. Each port is indi-
Compatible Serial Interface
vidually user configurable to either a logic input or logic
♦2.5V to 5.5V Operation
output.
♦-40°C to +125°C Temperature Range
Each port can be configured either as a push-pull logic
output capable of sinking 10mA and sourcing 4.5mA,
♦20 or 28 I/O Ports, Each Configurable as
or a Schmitt logic input with optional internal pullup.
Push-Pull Logic Output
Seven ports feature configurable transition detection
Schmitt Logic Input
logic, which generates an interrupt upon change of port
Schmitt Logic Input with Internal Pullup
logic level. The MAX7301 is controlled through an
SPI™-compatible 4-wire serial interface.
♦11µA (max) Shutdown Current
The MAX7301AAX and MAX7301AGL have 28 ports and
♦Logic Transition Detection for Seven I/O Ports
are available in 36-pin SSOP and 40-pin QFN packages,
respectively. The MAX7301AAI and MAX7301ANI have
20 ports and are available in 28-pin SSOP and 28-pin DIP
Ordering Information
packages, respectively.
PARTTEMP RANGEPIN-PACKAGE
For a 2-wire interfaced version, refer to the MAX7300
data sheet.
MAX7301ANI-40°C to +125°C28 DIP
MAX7301AAI-40°C to +125°C28 SSOP
For a pin-compatible port expander with additional
24mA constant-current LED drive capability, refer to the
MAX7301AAX-40°C to +125°C36 SSOP
MAX6957 data sheet.
MAX7301AGL-40°C to +125°C40 QFN
Applications
White Goods
Automotive
Typical Operating Circuit
Gaming Machines
3V
Industrial Controllers
36
V+
P4
32
I/O 4
P5
30
I/O 5
System Monitoring
47nF
3
2
GND
P6
28
I/O 6
GND
P7
26
I/O 7
39kΩ
1
MAX7301
ISET
P8
5
I/O 8
P9
7
I/O 9
35
P10
9
I/O 10
CHIP SELECT
P11
11
I/O 11
CLOCK IN
33
CS
P12
6
I/O 12
DATA IN
34
SCLK
P13
8
I/O 13
DATA OUT
4
DIN
DOUT
P14
10
I/O 14
P15
12
I/O 15
31
29
P31
P16
13
I/O 16
P30
P17
14
I/O 17
27
P29
P18
15
25
I/O 18
24
P28
P19
16
I/O 19
P27
P20
17
23
I/O 20
22
P26
P21
18
I/O 21
21
P25
P22
19
I/O 22
P24
P23
20
I/O 23
I/O 24
I/O 25
Pin Configurations appear at end of data sheet.
I/O 26
I/O 27
I/O 28
I/O 29
SPI and QSPI are trademarks of Motorola, Inc.
I/O 30
I/O 31
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________Maxim Integrated Products1
For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at
1-888-629-4642, or visit Maxim’s website at .
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
M
A
X
7
3
0
1
ABSOLUTE MAXIMUM RATINGS
Voltage (with respect to GND)
V+.............................................................................-0.3V to +6V
All -0.3V to (V+ + 0.3V)
P4–P31 Current ................................................................±30mA
800mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin PDIP (derate 20.8mW/°C above +70°C).........1667mW
28-Pin SSOP (derate 9.5mW/°C above +70°C)...........762mW
36-Pin SSOP (derate 11.8mW/°C above +70°C).........941mW
40-Pin QFN (derate 23.25mW/°C above +70°C).......1860mW
Operating Temperature Range
(T
MIN
, T
MAX
)..................................................-40°C to +125°C
+150°C
Storage -65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit, V+ = 2.5V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
PARAMETER
Operating Supply Voltage
Shutdown Supply Current
SYMBOL
V+
I
SHDN
All digital inputs at V+
or GND
All ports programmed
as outputs high, no
load, all other inputs
at V+ or GND
All ports programmed
as outputs low, no
load, all other inputs
at V+ or GND
All ports programmed
as inputs without
pullup, ports, and all
other inputs at V+ or
GND
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= - 40° C to + 85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= - 40° C to + 85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= - 40° C to + 85°C
T
A
= T
MIN
to T
MAX
110
170
180
CONDITIONSMIN
2.5
5.5
TYPMAX
5.5
8
µA
11
230
250
270
210
230
240
135
140
145
µA
µA
µA
UNITS
V
T
A
= - 40° C to + 85°C 10
Operating Supply Current
(Output High)
I
GPOH
Operating Supply Current
(Output Low)
I
GPOL
Operating Supply Current
(Input)
INPUTS AND OUTPUTS
Logic High Input Voltage
Port Inputs
Logic Low Input Voltage
Port Inputs
Input Leakage Current
GPIO Input Internal Pullup to V+
Hysteresis Voltage GPIO Inputs
I
GPI
V
IH
V
IL
I
IH
, I
IL
I
PU
∆V
I
GPIO outputs, I
SOURCE
= 2mA,
T
A
= -40°C to +85°C
GPIO outputs, I
SOURCE
= 1mA,
T
A
= T
MIN
to T
MAX
(Note 2)
GPIO inputs without pullup,
VPORT = V+ to GND
V+ = 2.5V
V+ = 5.5V
0.7
✕
V+
0.3
✕
V+
-100
12
80
V+ -
0.7
V+ -
0.7
±1
19
120
0.3
+100
30
180
V
V
nA
µA
V
Output High VoltageV
OH
V
2_______________________________________________________________________________________
2024年3月22日发(作者：宓嘉佑)
现货库存、技术资料、百科信息、热点资讯，精彩尽在鼎好!
19-2438; Rev 3; 10/03
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
General DescriptionFeatures
The MAX7301 compact, serial-interfaced I/O expander
(or general-purpose I/O (GPIO) peripheral) provides
♦High-Speed 26MHz SPI-/QSPI-™/MICROWIRE™-
microprocessors with up to 28 ports. Each port is indi-
Compatible Serial Interface
vidually user configurable to either a logic input or logic
♦2.5V to 5.5V Operation
output.
♦-40°C to +125°C Temperature Range
Each port can be configured either as a push-pull logic
output capable of sinking 10mA and sourcing 4.5mA,
♦20 or 28 I/O Ports, Each Configurable as
or a Schmitt logic input with optional internal pullup.
Push-Pull Logic Output
Seven ports feature configurable transition detection
Schmitt Logic Input
logic, which generates an interrupt upon change of port
Schmitt Logic Input with Internal Pullup
logic level. The MAX7301 is controlled through an
SPI™-compatible 4-wire serial interface.
♦11µA (max) Shutdown Current
The MAX7301AAX and MAX7301AGL have 28 ports and
♦Logic Transition Detection for Seven I/O Ports
are available in 36-pin SSOP and 40-pin QFN packages,
respectively. The MAX7301AAI and MAX7301ANI have
20 ports and are available in 28-pin SSOP and 28-pin DIP
Ordering Information
packages, respectively.
PARTTEMP RANGEPIN-PACKAGE
For a 2-wire interfaced version, refer to the MAX7300
data sheet.
MAX7301ANI-40°C to +125°C28 DIP
MAX7301AAI-40°C to +125°C28 SSOP
For a pin-compatible port expander with additional
24mA constant-current LED drive capability, refer to the
MAX7301AAX-40°C to +125°C36 SSOP
MAX6957 data sheet.
MAX7301AGL-40°C to +125°C40 QFN
Applications
White Goods
Automotive
Typical Operating Circuit
Gaming Machines
3V
Industrial Controllers
36
V+
P4
32
I/O 4
P5
30
I/O 5
System Monitoring
47nF
3
2
GND
P6
28
I/O 6
GND
P7
26
I/O 7
39kΩ
1
MAX7301
ISET
P8
5
I/O 8
P9
7
I/O 9
35
P10
9
I/O 10
CHIP SELECT
P11
11
I/O 11
CLOCK IN
33
CS
P12
6
I/O 12
DATA IN
34
SCLK
P13
8
I/O 13
DATA OUT
4
DIN
DOUT
P14
10
I/O 14
P15
12
I/O 15
31
29
P31
P16
13
I/O 16
P30
P17
14
I/O 17
27
P29
P18
15
25
I/O 18
24
P28
P19
16
I/O 19
P27
P20
17
23
I/O 20
22
P26
P21
18
I/O 21
21
P25
P22
19
I/O 22
P24
P23
20
I/O 23
I/O 24
I/O 25
Pin Configurations appear at end of data sheet.
I/O 26
I/O 27
I/O 28
I/O 29
SPI and QSPI are trademarks of Motorola, Inc.
I/O 30
I/O 31
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________Maxim Integrated Products1
For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at
1-888-629-4642, or visit Maxim’s website at .
MAX7301
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port I/O Expander
M
A
X
7
3
0
1
ABSOLUTE MAXIMUM RATINGS
Voltage (with respect to GND)
V+.............................................................................-0.3V to +6V
All -0.3V to (V+ + 0.3V)
P4–P31 Current ................................................................±30mA
800mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin PDIP (derate 20.8mW/°C above +70°C).........1667mW
28-Pin SSOP (derate 9.5mW/°C above +70°C)...........762mW
36-Pin SSOP (derate 11.8mW/°C above +70°C).........941mW
40-Pin QFN (derate 23.25mW/°C above +70°C).......1860mW
Operating Temperature Range
(T
MIN
, T
MAX
)..................................................-40°C to +125°C
+150°C
Storage -65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit, V+ = 2.5V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.) (Note 1)
PARAMETER
Operating Supply Voltage
Shutdown Supply Current
SYMBOL
V+
I
SHDN
All digital inputs at V+
or GND
All ports programmed
as outputs high, no
load, all other inputs
at V+ or GND
All ports programmed
as outputs low, no
load, all other inputs
at V+ or GND
All ports programmed
as inputs without
pullup, ports, and all
other inputs at V+ or
GND
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= - 40° C to + 85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= - 40° C to + 85°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= - 40° C to + 85°C
T
A
= T
MIN
to T
MAX
110
170
180
CONDITIONSMIN
2.5
5.5
TYPMAX
5.5
8
µA
11
230
250
270
210
230
240
135
140
145
µA
µA
µA
UNITS
V
T
A
= - 40° C to + 85°C 10
Operating Supply Current
(Output High)
I
GPOH
Operating Supply Current
(Output Low)
I
GPOL
Operating Supply Current
(Input)
INPUTS AND OUTPUTS
Logic High Input Voltage
Port Inputs
Logic Low Input Voltage
Port Inputs
Input Leakage Current
GPIO Input Internal Pullup to V+
Hysteresis Voltage GPIO Inputs
I
GPI
V
IH
V
IL
I
IH
, I
IL
I
PU
∆V
I
GPIO outputs, I
SOURCE
= 2mA,
T
A
= -40°C to +85°C
GPIO outputs, I
SOURCE
= 1mA,
T
A
= T
MIN
to T
MAX
(Note 2)
GPIO inputs without pullup,
VPORT = V+ to GND
V+ = 2.5V
V+ = 5.5V
0.7
✕
V+
0.3
✕
V+
-100
12
80
V+ -
0.7
V+ -
0.7
±1
19
120
0.3
+100
30
180
V
V
nA
µA
V
Output High VoltageV
OH
V
2_______________________________________________________________________________________