2024年11月5日发(作者：南宫迎梅)
元器件交易网
19-2043; Rev 1; 8/01
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
General Description____________________________Features
The MAX6400–MAX6405 is a family of ultra-low power
microprocessor (µP) supervisory circuits used for moni-
oUltra-Small 4-Bump (2
✕
(Package Pending Full Qualification—Expected
2) Chip-Scale Package,
toring battery, power-supply, and regulated system
voltages. Each device contains a precision bandgap
Completion Date 6/30/01. See UCSP Reliability
reference comparator and is trimmed to specified trip
Section for More Details.)
threshold voltages. These devices provide excellent cir-
o70% Smaller Than SC70 Package
cuit reliability and low cost by eliminating external com-
oUltra-Low 500nA (typ) Supply Current
ponents and adjustments when monitoring system
(MAX6400/MAX6401/MAX6402)
voltages from 2.5V to 5.0V. A manual reset input is also
included.
oFactory-Trimmed Reset Thresholds from 2.20V to
4.63V in Approximately 100mV Increments
The MAX6400–MAX6405 assert a reset signal whenev-
er the V
CC
supply voltage falls below a preset thresh-
o±2.5% Threshold Accuracy -40°C to +85°C
old. These devices are differentiated by their output
oFactory-Set 100ms (min) Reset Timeout Period
logic configurations and preset threshold voltages. The
MAX6400/MAX6403 (push-pull) and the MAX6402/
oManual Reset Input
MAX6405 (open-drain) have an active-low reset (RESET
oGuaranteed Reset Valid to V
CC
= 1.0V
is logic low when V
CC
is below V
TH
). The MAX6401/
oThree Reset Output Logic Options: Active-Low
MAX6404 have an active-high push-pull output (RESET
Push-Pull, Active-High Push-Pull, and Active-Low
is logic high when V
CC
is below V
Open-Drain.
guaranteed to be in the correct output logic state for
TH
). All parts are
V
oImmune to Short V
CC
Transients
fast transients on V
CC
down to 1V. The reset circuit is designed to ignore
CC
. The MAX6400/MAX6401/
oNo External Components
MAX6402 have voltage thresholds between 2.20V and
3.08V in approximately 100mV increments. The
Ordering Information
MAX6403/MAX6404/MAX6405 have voltage thresholds
P
ART
TEMP. RANGEP
IN-PACKAGE
between 3.30V and 4.63V in approximately 100mV
MAX6400BS_ _-T
-40
o
C to +85
o
CU
CSP-4
increments.
MAX6401BS_ _-T-
40
o
C to +85
o
CU
CSP-4
Ultra-low supply current of 500nA (MAX6400/MAX6401/
MAX6402) makes these parts ideal for use in portable
M
AX6402BS_ _-T-
40
o
C to +85
o
CU
CSP-4
equipment. These devices are available in 4-bump
M
AX6403BS_ _-T-
40
o
C to +85
o
CU
CSP-4
chip-scale packages (UCSP™)
M
AX6404BS_ _-T-
40
o
C to +85
o
CU
CSP-4
Applications
M
AX6405BS_ _-T-
40
o
C to +85
o
CU
CSP-4
Portable/Battery-Powered Equipment
The MAX6400–MAX6405 are available in factory-set V
CC
reset
Cell Phones
thresholds from 2.20V to 4.63V, in approximately 0.1V incre-
ments. Choose the desired reset-threshold suffix from Table 1
PDAs
and insert it in the blank space following “S”. There are 21 stan-
MP3 Players
dard versions with a required order increment of 2500 pieces.
Pagers
Sample stock is generally held on the standard versions only
(Table 1). Required order increment is 10,000 pieces for non-
Selector Guide
standard versions (Table 2). Contact factory for availability. All
devices available in tape-and-reel only.
PART
NOMINAL
RESET/RESET
UCSP reliability is integrally linked to the user’s assembly
V
TH
(V)OUTPUT TYPE
methods, circuit board material, and environment. Refer to the
MAX64002.20 to 3.08Push-Pull, Active-Low
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
MAX64012.20 to 3.08Push-Pull, Active-High
MAX64022.20 to 3.08Open-Drain, Active-Low
Pin Configuration appears at end of data sheet.
MAX64033.30 to 4.63Push-Pull, Active-Low
MAX64043.30 to 4.63Push-Pull, Active-High
MAX64053.30 to 4.63Open-Drain, Active-Low
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________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 .
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
M
A
X
6
4
0
0
–
M
A
X
6
4
0
5
ABSOLUTE MAXIMUM RATINGS
All voltages measured with respect to GND, unless otherwise noted.
V
CC
...........................................................................-0.3V to +6V
RESET, RESET(push-pull).........................-0.3V to (V
CC
+ 0.3V)
RESET(open-drain)..................................................-0.3V to +6V
MR..............................................................-0.3V to (V
CC
+ 0.3V)
Input/Output into 20mA
Continuous Power Dissipation (T
A
= +70°C)
4-Bump UCSP (derate 3.8mW/°C above +70°C).........303mW
Operating Temperature Range ..........................-40°C to +85°C
+150°C
Storage Temperature Range ............................-65°C to +150°C
Bump Reflow Temperature .............................................+235°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
(V
CC
= 1.0V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.0V and T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
SYMBOL
V
CC
CONDITIONS
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
MAX6400/MAX6401/MAX6402
V
CC
= 3.0V for V
TH
≤ 2.93V,
V
CC
= 3.2V for V
TH
≥ 2.93V, no load
V
CC
= 5.5V, no load
Reset Threshold
Reset Threshold Hysteresis
Reset Threshold Tempco
V
CC
to Reset Delay
Reset Active Timeout Period
∆V
TH
/°C
t
RD
t
RP
V
IL
MR Input
V
IH
V
IL
V
IH
MR Minimum Input Pulse Width
MR Glitch Rejection
MR to Reset Delay Time
MR Pullup Resistance25
t
MD
V
TH
> 4.0V
V
TH
≤ 4.0V
V
CC
= (V
TH
+100mV) to (V
TH
- 100mV)
100
2.0
0.2 x V
CC
0.7 x V
CC
1
100
200
5075
µs
ns
ns
kΩ
V
TH
Table 1
T
A
= +25°C
T
A
= -40°C to +85°C
MIN
1.0
1.2
0.5
1.0
TYPMAX
5.5
5.5
1.0
1.75
V
mV
ppm/°C
µs
280
0.8
V
ms
UNITS
V
Supply CurrentI
CC
µA
V
TH
- 1.5% V
TH
+ 1.5%
V
TH
V
TH
- 2.5% V
TH
+ 2.5%
V
TH
6.3
9.5
40
20
185
MAX6400/MAX6401/MAX6402
MAX6403/MAX6404/MAX6405
2_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 1.0V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.0V and T
A
= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RESET Output Voltage Low
I
SINK
= 1.6mA, V
CC
≥ 2.1V, reset asserted0.3
(MAX6400/MAX6402/MAX6403/V
OL
V
MAX6405)
I
SINK
= 100µA, V
CC
≥ 1.2V, reset asserted0.4
I
SOURCE
= 500µA, V
CC
= 3.2V, MAX6400,
only, reset not asserted
0.8 x V
CC
RESET Output Voltage High
= 800µA, V
CC
= 4.5V,
(MAX6400/MAX6403)
V
OH
I
SOURCE
V
TH
≤ 4.38V, reset not asserted
0.8 x V
CC
V
I
SOURCE
= 800µA, V
CC
= V
TH
(max),
V
TH
≥ 4.5V, reset not asserted
0.8 x V
CC
I
SOURCE
= 500µA, V
CC
≥ 2.1V, reset
asserted
0.8 x V
CC
V
OH
I
SOURCE
= 50µA, V
CC
≥ 1.2V, reset
asserted
0.8 x V
CC
RESET Output VoltageI
SINK
= 1.2mA, V
CC
≥ 3.2V, reset not
(MAX6401/MAX6404)asserted, MAX6401 only
0.3V
V
OL
I
SINK
= 3.2mA, V
CC
≥ 4.5V, reset not
asserted, V
TH
≤ 4.38V
0.4
I
SINK
= 3.2mA, V
CC
= V
TH
(max),
V
TH
≥ 4.5V, reset not asserted
0.4
Open-Drain RESET Output
Leakage Current (Note 2)
RESET not asserted0.1µA
Note 1:Production testing done at +25°C only. Overtemperature limits are guaranteed by design and not production tested.
Note 2:Guaranteed by design.
_______________________________________________________________________________________3
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
0
5
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
4
6
X
A
M
–
0
0
4
6
X
A
M
4
POWER-DOWN RESET DELAY
SUPPLY CURRENT vs. TEMPERATURE
vs. TEMPERATURE
1
0
250
2
0
1.4
c
c
o
o
t
t
5
V
OD
= OVERDRIVE VOLTAGE
5
0
0
-
-
0
0
0
0
4
4
1.2
6
6
X
X
A
A
M
200
M
)
A
µ
V
CC
= 5V
)
(
s
T
1.0
µ
N
(
E
Y
A
150
R
R
L
U
0.8
E
C
V
CC
= 3.3V
D
V
OD
= 10mV
Y
T
0.6
E
L
P
S
E
100
P
U
R
S
0.4
V
OD
= 20mV
50
0.2
V
CC
= 1.2V
V
OD
= 100mV
0
0
V
OD
= 200mV
-40-2
-40-2
TEMPERATURE (
°
C)
TEMPERATURE (
°
C)
POWER-UP RESET TIMEOUT
MAXIMUM TRANSIENT DURATION
vs. TEMPERATURE
vs. THRESHOLD OVERDRIVE
210
3
500
4
0
0
c
c
o
o
t
t
5
5
0
)
0
-
0
s
-
)
200
0
s
4
µ
0
0
6
(
4
m
X
400
6
A
N
X
(
M
O
A
M
T
I
U
190
T
O
A
E
R
M
180
U
D
I
T
T
300
T
N
E
E
S
170
I
E
S
R
N
RESET/RESET IS
P
A
U
160
R
200
T
ASSERTED
-
R
M
ABOVE LINE
E
W
U
O
150
M
I
P
X
A
100
140
M
130
0
-40-2
1101001000
TEMPERATURE (
°
C)
THRESHOLD OVERDRIVE V
TH
- V
CC
(mV)
_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
Pin Description
PIN
MAX6400/MAX6402
FUNCTION
MAX6403/MAX6405
MAX6401/MAX6404
NAME
A1A1GNDGround
Active-Low Reset Output, (Open-Drain or Push-Pull). RESET
is asserted low when the V
CC
input is below the selected
B1—RESETreset threshold. RESET remains low for the reset timeout
period after V
CC
exceeds the device reset threshold. Open-
drain outputs require an external pullup resistor.
A
ctive-High Reset Output. RESET remains high while V
CC
is
—B1RESET
below the reset threshold and for at least 100ms after V
CC
rises above the reset threshold.
Active-Low Manual Reset. Internal 50kΩ pullup to V
CC
. Pull
B2B2MR
low to assert a reset. Reset remains asserted as long as MR
is low and for the reset timeout period after MR goes high.
Leave unconnected or connect to V
CC
if unused.
A2A2V
CC
Supply Voltage and Input for the Reset Threshold Monitor
Detailed Description
the reset active timeout period (t
RP
) after MRreturns
Reset Output
high. This input has an internal 50kΩpullup resistor, so
A microprocessor’s (µP’s) reset input starts the µP in a
it can be left open if it is not used. MRcan be driven
known state. These µP supervisory circuits assert reset
with TTL or CMOS logic levels, or with open-drain/col-
to prevent code execution errors during power-up,
lector outputs. Connect a normally open momentary
power-down, or brownout conditions.
switch from MRto GND to create a manual reset func-
tion; external debouncing circuitry is not required. If MR
RESETis guaranteed to be a logic low for V
is driven from long cables or if the device is used in a
exceeds the reset threshold, an internal
CC
down to
1V. Once V
noisy environment, connect a 0.1µF capacitor from MR
timer keeps
CC
RESETlow for the reset timeout period;
to ground to provide additional noise immunity (see
after this interval, RESETgoes high.
Figure 1).
If a brownout condition occurs (V
RESETgoes low. Any time V
CC
dips below the
reset threshold),
Applications Information
CC
goes
below the reset threshold, the internal timer resets to
Interfacing to µP with Bidirectional
zero, and RESETgoes low. The internal timer starts
Reset Pins
after V
CC
returns above the reset threshold, and RESET
Since the RESEToutput on the MAX6402/MAX6405 is
remains low for the reset timeout period.
open-drain, these devices interface easily with (µPs)
The manual reset input (MR) can also initiate a reset,
that have bidirectional reset pins. Connecting the µP
see the Manual Reset Inputsection. The MAX6401/
supervisor’s RESEToutput directly to the microcon-
MAX6404 have active-high RESET outputs that are the
troller’s (µC’s) RESETpin with a single pullup resistor
inverse of the MAX6400/MAX6402/MAX6403/MAX6405
allows either device to assert reset (Figure 2).
outputs (Figure 1).
Negative-Going VCC Transients
Manual Reset Input
These devices are relatively immune to short-duration,
Many µP-based products require manual reset capabil-
negative-going V
CC
transients (glitches).
ity, allowing the operator, a test technician, or external
The Typical Operating Characteristicsshow the
logic circuit to initiate a reset. A logic low on MRasserts
Maximum Transient Duration vs. Reset Threshold
reset. Reset remains asserted while MRis low, and for
Overdrive graph, for which reset pulses are not gener-
_______________________________________________________________________________________5
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
M
A
X
6
4
0
0
–
M
A
X
6
4
0
5
V
CC
V
TH
t
RD
t
RP
RESET
t
MR
t
RP
MR
Figure 1. Reset Timing Diagram
V
CC
V
CC
V
CC
µP
ated. The graph shows the maximum pulse width that a
negative going V
CC
transient may typically have when
issuing a reset signal. As the amplitude of the transient
increases, the maximum allowable pulse width
decreases.
Chip Information
TRANSISTOR COUNT: 512
PROCESS: BiCMOS
MAX6402/
MAX6405
MR
GND
RESET
RESET
INPUT
MOTOROLA
68HCXX
GND
Figure 2. Interfacing to µPs with Bidirectional Reset Pins
6_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
Table 1. Factory Trimmed Reset Thresholds*
Reset Threshold Voltage, V
TH
(V)
PARTSSUFFIX
T
A
= +25°CT
A
= -40°C to +85°C
MINTYPMAXMINMAX
22*2.1672.2002.2332.1452.250
23*2.2852.3202.3552.2622.375
242.3642.4002.4362.3402.460
252.4622.5002.5372.4372.562
MAX6400BS
MAX6401BS
26*2.5912.6302.6692.5642.692
MAX6402BS
272.6602.7002.7412.6332.768
282.7582.8002.8422.7302.870
29*2.8862.9302.9742.8573.000
302.9553.0003.0452.9253.075
31*3.0343.0803.1263.0033.150
333.2503.3003.3503.2173.383
343.3493.4003.4513.3153.485
353.4473.5003.5523.4123.587
363.5463.6003.6543.5103.690
373.6443.7003.7553.6073.792
M
AX6403BS
383.7433.8003.8573.7053.895
MAX6404BS
393.8413.9003.9583.8023.997
MAX6405BS
403.9404.0004.0603.9004.100
414.0384.1004.1613.9974.202
424.1374.2004.2634.0954.305
434.2354.3004.3644.1924.407
44*4.3144.3804.4464.2704.489
454.4324.5004.5674.3874.612
46*4.5604.6304.6994.5144.746
Factory-trimmed voltage thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
*Note: Parts marked with an asterisk (*) are standard versions.
_______________________________________________________________________________________7
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
M
A
X
6
4
0
0
–
M
A
X
6
4
0
5
Table 2. Device Marking Codes
PARTS
MAX6400BS31-T
MAX6400BS30-T
MAX6400BS29-T
MAX6400BS28-T
MAX6400BS27-T
MAX6400BS26-T
MAX6400BS25-T
MAX6400BS24-T
MAX6400BS23-T
MAX6400BS22-T
PARTS
MAX6403BS46-T
MAX6403BS45-T
MAX6403BS44-T
MAX6403BS43-T
MAX6403BS42-T
MAX6403BS41-T
MAX6403BS40-T
MAX6403BS39-T
MAX6403BS38-T
MAX6403BS37-T
MAX6403BS36-T
MAX6403BS35-T
MAX6403BS34-T
MAX6403BS33-T
TOP MARK
AAJ
AAI
AAH
AAG
AAF
AAE
AAD
AAC
AAB
AAA
TOP MARK
ACT
ACS
ACR
ACQ
ACP
ACO
ACN
ACM
ACL
ACK
ACJ
ACI
ACH
ACG
PARTS
MAX6401BS31-T
MAX6401BS30-T
MAX6401BS29-T
MAX6401BS28-T
MAX6401BS27-T
MAX6401BS26-T
MAX6401BS25-T
MAX6401BS24-T
MAX6401BS23-T
MAX6401BS22-T
PARTS
MAX6404BS46-T
MAX6404BS45-T
MAX6404BS44-T
MAX6404BS43-T
MAX6404BS42-T
MAX6404BS41-T
MAX6404BS40-T
MAX6404BS39-T
MAX6404BS38-T
MAX6404BS37-T
MAX6404BS36-T
MAX6404BS35-T
MAX6404BS34-T
MAX6404BS33-T
TOP MARK
ABV
ABU
ABT
ABS
ABR
ABQ
ABP
ABO
ABN
ABM
TOP MARK
ADH
ADG
ADF
ADE
ADD
ADC
ADB
ADA
ACZ
ACY
ACX
ACW
ACV
ACU
PARTS
MAX6402BS31-T
MAX6402BS30-T
MAX6402BS29-T
MAX6402BS28-T
MAX6402BS27-T
MAX6402BS26-T
MAX6402BS25-T
MAX6402BS24-T
MAX6402BS23-T
MAX6402BS22-T
PARTS
MAX6405BS46-T
MAX6405BS45-T
MAX6405BS44-T
MAX6405BS43-T
MAX6405BS42-T
MAX6405BS41-T
MAX6405BS40-T
MAX6405BS39-T
MAX6405BS38-T
MAX6405BS37-T
MAX6405BS36-T
MAX6405BS35-T
MAX6405BS34-T
MAX6405BS33-T
TOP MARK
ACF
ACE
ACD
ACC
ACB
ACA
ABZ
ABY
ABX
ABW
TOP MARK
ADV
ADU
ADT
ADS
ADR
ADQ
ADP
ADO
ADN
ADM
ADL
ADK
ADJ
ADI
UCSP Reliability
The chip-scale package (UCSP) represents a unique
packaging form factor that may not perform equally to a
packaged product through traditional mechanical reliabil-
ity tests. CSP reliability is integrally linked to the user’s
assembly methods, circuit board material, and usage
environment. The user should closely review these areas
when considering use of a CSP package. Performance
through Operating Life Test and Moisture Resistance
remains uncompromised as it is primarily determined by
the wafer-fabrication process.
Mechanical stress performance is a greater considera-
tion for a CSP package. CSPs are attached through
direct solder contact to the user’s PC board, foregoing
the inherent stress relief of a packaged product lead
frame. Solder joint contact integrity must be considered.
Information on Maxim’s qualification plan, test data, and
recommendations are detailed in the UCSP application
note, which can be found on Maxim’s website at
.
8_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
Package Information
S
P
E
.
2
x
2
P
S
C
U
,
L
4
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600______________________9
©2001 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products.
MAX6400–MAX6405
2024年11月5日发(作者：南宫迎梅)
元器件交易网
19-2043; Rev 1; 8/01
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
General Description____________________________Features
The MAX6400–MAX6405 is a family of ultra-low power
microprocessor (µP) supervisory circuits used for moni-
oUltra-Small 4-Bump (2
✕
(Package Pending Full Qualification—Expected
2) Chip-Scale Package,
toring battery, power-supply, and regulated system
voltages. Each device contains a precision bandgap
Completion Date 6/30/01. See UCSP Reliability
reference comparator and is trimmed to specified trip
Section for More Details.)
threshold voltages. These devices provide excellent cir-
o70% Smaller Than SC70 Package
cuit reliability and low cost by eliminating external com-
oUltra-Low 500nA (typ) Supply Current
ponents and adjustments when monitoring system
(MAX6400/MAX6401/MAX6402)
voltages from 2.5V to 5.0V. A manual reset input is also
included.
oFactory-Trimmed Reset Thresholds from 2.20V to
4.63V in Approximately 100mV Increments
The MAX6400–MAX6405 assert a reset signal whenev-
er the V
CC
supply voltage falls below a preset thresh-
o±2.5% Threshold Accuracy -40°C to +85°C
old. These devices are differentiated by their output
oFactory-Set 100ms (min) Reset Timeout Period
logic configurations and preset threshold voltages. The
MAX6400/MAX6403 (push-pull) and the MAX6402/
oManual Reset Input
MAX6405 (open-drain) have an active-low reset (RESET
oGuaranteed Reset Valid to V
CC
= 1.0V
is logic low when V
CC
is below V
TH
). The MAX6401/
oThree Reset Output Logic Options: Active-Low
MAX6404 have an active-high push-pull output (RESET
Push-Pull, Active-High Push-Pull, and Active-Low
is logic high when V
CC
is below V
Open-Drain.
guaranteed to be in the correct output logic state for
TH
). All parts are
V
oImmune to Short V
CC
Transients
fast transients on V
CC
down to 1V. The reset circuit is designed to ignore
CC
. The MAX6400/MAX6401/
oNo External Components
MAX6402 have voltage thresholds between 2.20V and
3.08V in approximately 100mV increments. The
Ordering Information
MAX6403/MAX6404/MAX6405 have voltage thresholds
P
ART
TEMP. RANGEP
IN-PACKAGE
between 3.30V and 4.63V in approximately 100mV
MAX6400BS_ _-T
-40
o
C to +85
o
CU
CSP-4
increments.
MAX6401BS_ _-T-
40
o
C to +85
o
CU
CSP-4
Ultra-low supply current of 500nA (MAX6400/MAX6401/
MAX6402) makes these parts ideal for use in portable
M
AX6402BS_ _-T-
40
o
C to +85
o
CU
CSP-4
equipment. These devices are available in 4-bump
M
AX6403BS_ _-T-
40
o
C to +85
o
CU
CSP-4
chip-scale packages (UCSP™)
M
AX6404BS_ _-T-
40
o
C to +85
o
CU
CSP-4
Applications
M
AX6405BS_ _-T-
40
o
C to +85
o
CU
CSP-4
Portable/Battery-Powered Equipment
The MAX6400–MAX6405 are available in factory-set V
CC
reset
Cell Phones
thresholds from 2.20V to 4.63V, in approximately 0.1V incre-
ments. Choose the desired reset-threshold suffix from Table 1
PDAs
and insert it in the blank space following “S”. There are 21 stan-
MP3 Players
dard versions with a required order increment of 2500 pieces.
Pagers
Sample stock is generally held on the standard versions only
(Table 1). Required order increment is 10,000 pieces for non-
Selector Guide
standard versions (Table 2). Contact factory for availability. All
devices available in tape-and-reel only.
PART
NOMINAL
RESET/RESET
UCSP reliability is integrally linked to the user’s assembly
V
TH
(V)OUTPUT TYPE
methods, circuit board material, and environment. Refer to the
MAX64002.20 to 3.08Push-Pull, Active-Low
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
MAX64012.20 to 3.08Push-Pull, Active-High
MAX64022.20 to 3.08Open-Drain, Active-Low
Pin Configuration appears at end of data sheet.
MAX64033.30 to 4.63Push-Pull, Active-Low
MAX64043.30 to 4.63Push-Pull, Active-High
MAX64053.30 to 4.63Open-Drain, Active-Low
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________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 .
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
M
A
X
6
4
0
0
–
M
A
X
6
4
0
5
ABSOLUTE MAXIMUM RATINGS
All voltages measured with respect to GND, unless otherwise noted.
V
CC
...........................................................................-0.3V to +6V
RESET, RESET(push-pull).........................-0.3V to (V
CC
+ 0.3V)
RESET(open-drain)..................................................-0.3V to +6V
MR..............................................................-0.3V to (V
CC
+ 0.3V)
Input/Output into 20mA
Continuous Power Dissipation (T
A
= +70°C)
4-Bump UCSP (derate 3.8mW/°C above +70°C).........303mW
Operating Temperature Range ..........................-40°C to +85°C
+150°C
Storage Temperature Range ............................-65°C to +150°C
Bump Reflow Temperature .............................................+235°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
(V
CC
= 1.0V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.0V and T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
SYMBOL
V
CC
CONDITIONS
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
MAX6400/MAX6401/MAX6402
V
CC
= 3.0V for V
TH
≤ 2.93V,
V
CC
= 3.2V for V
TH
≥ 2.93V, no load
V
CC
= 5.5V, no load
Reset Threshold
Reset Threshold Hysteresis
Reset Threshold Tempco
V
CC
to Reset Delay
Reset Active Timeout Period
∆V
TH
/°C
t
RD
t
RP
V
IL
MR Input
V
IH
V
IL
V
IH
MR Minimum Input Pulse Width
MR Glitch Rejection
MR to Reset Delay Time
MR Pullup Resistance25
t
MD
V
TH
> 4.0V
V
TH
≤ 4.0V
V
CC
= (V
TH
+100mV) to (V
TH
- 100mV)
100
2.0
0.2 x V
CC
0.7 x V
CC
1
100
200
5075
µs
ns
ns
kΩ
V
TH
Table 1
T
A
= +25°C
T
A
= -40°C to +85°C
MIN
1.0
1.2
0.5
1.0
TYPMAX
5.5
5.5
1.0
1.75
V
mV
ppm/°C
µs
280
0.8
V
ms
UNITS
V
Supply CurrentI
CC
µA
V
TH
- 1.5% V
TH
+ 1.5%
V
TH
V
TH
- 2.5% V
TH
+ 2.5%
V
TH
6.3
9.5
40
20
185
MAX6400/MAX6401/MAX6402
MAX6403/MAX6404/MAX6405
2_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 1.0V to 5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.0V and T
A
= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RESET Output Voltage Low
I
SINK
= 1.6mA, V
CC
≥ 2.1V, reset asserted0.3
(MAX6400/MAX6402/MAX6403/V
OL
V
MAX6405)
I
SINK
= 100µA, V
CC
≥ 1.2V, reset asserted0.4
I
SOURCE
= 500µA, V
CC
= 3.2V, MAX6400,
only, reset not asserted
0.8 x V
CC
RESET Output Voltage High
= 800µA, V
CC
= 4.5V,
(MAX6400/MAX6403)
V
OH
I
SOURCE
V
TH
≤ 4.38V, reset not asserted
0.8 x V
CC
V
I
SOURCE
= 800µA, V
CC
= V
TH
(max),
V
TH
≥ 4.5V, reset not asserted
0.8 x V
CC
I
SOURCE
= 500µA, V
CC
≥ 2.1V, reset
asserted
0.8 x V
CC
V
OH
I
SOURCE
= 50µA, V
CC
≥ 1.2V, reset
asserted
0.8 x V
CC
RESET Output VoltageI
SINK
= 1.2mA, V
CC
≥ 3.2V, reset not
(MAX6401/MAX6404)asserted, MAX6401 only
0.3V
V
OL
I
SINK
= 3.2mA, V
CC
≥ 4.5V, reset not
asserted, V
TH
≤ 4.38V
0.4
I
SINK
= 3.2mA, V
CC
= V
TH
(max),
V
TH
≥ 4.5V, reset not asserted
0.4
Open-Drain RESET Output
Leakage Current (Note 2)
RESET not asserted0.1µA
Note 1:Production testing done at +25°C only. Overtemperature limits are guaranteed by design and not production tested.
Note 2:Guaranteed by design.
_______________________________________________________________________________________3
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
0
5
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
4
6
X
A
M
–
0
0
4
6
X
A
M
4
POWER-DOWN RESET DELAY
SUPPLY CURRENT vs. TEMPERATURE
vs. TEMPERATURE
1
0
250
2
0
1.4
c
c
o
o
t
t
5
V
OD
= OVERDRIVE VOLTAGE
5
0
0
-
-
0
0
0
0
4
4
1.2
6
6
X
X
A
A
M
200
M
)
A
µ
V
CC
= 5V
)
(
s
T
1.0
µ
N
(
E
Y
A
150
R
R
L
U
0.8
E
C
V
CC
= 3.3V
D
V
OD
= 10mV
Y
T
0.6
E
L
P
S
E
100
P
U
R
S
0.4
V
OD
= 20mV
50
0.2
V
CC
= 1.2V
V
OD
= 100mV
0
0
V
OD
= 200mV
-40-2
-40-2
TEMPERATURE (
°
C)
TEMPERATURE (
°
C)
POWER-UP RESET TIMEOUT
MAXIMUM TRANSIENT DURATION
vs. TEMPERATURE
vs. THRESHOLD OVERDRIVE
210
3
500
4
0
0
c
c
o
o
t
t
5
5
0
)
0
-
0
s
-
)
200
0
s
4
µ
0
0
6
(
4
m
X
400
6
A
N
X
(
M
O
A
M
T
I
U
190
T
O
A
E
R
M
180
U
D
I
T
T
300
T
N
E
E
S
170
I
E
S
R
N
RESET/RESET IS
P
A
U
160
R
200
T
ASSERTED
-
R
M
ABOVE LINE
E
W
U
O
150
M
I
P
X
A
100
140
M
130
0
-40-2
1101001000
TEMPERATURE (
°
C)
THRESHOLD OVERDRIVE V
TH
- V
CC
(mV)
_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
Pin Description
PIN
MAX6400/MAX6402
FUNCTION
MAX6403/MAX6405
MAX6401/MAX6404
NAME
A1A1GNDGround
Active-Low Reset Output, (Open-Drain or Push-Pull). RESET
is asserted low when the V
CC
input is below the selected
B1—RESETreset threshold. RESET remains low for the reset timeout
period after V
CC
exceeds the device reset threshold. Open-
drain outputs require an external pullup resistor.
A
ctive-High Reset Output. RESET remains high while V
CC
is
—B1RESET
below the reset threshold and for at least 100ms after V
CC
rises above the reset threshold.
Active-Low Manual Reset. Internal 50kΩ pullup to V
CC
. Pull
B2B2MR
low to assert a reset. Reset remains asserted as long as MR
is low and for the reset timeout period after MR goes high.
Leave unconnected or connect to V
CC
if unused.
A2A2V
CC
Supply Voltage and Input for the Reset Threshold Monitor
Detailed Description
the reset active timeout period (t
RP
) after MRreturns
Reset Output
high. This input has an internal 50kΩpullup resistor, so
A microprocessor’s (µP’s) reset input starts the µP in a
it can be left open if it is not used. MRcan be driven
known state. These µP supervisory circuits assert reset
with TTL or CMOS logic levels, or with open-drain/col-
to prevent code execution errors during power-up,
lector outputs. Connect a normally open momentary
power-down, or brownout conditions.
switch from MRto GND to create a manual reset func-
tion; external debouncing circuitry is not required. If MR
RESETis guaranteed to be a logic low for V
is driven from long cables or if the device is used in a
exceeds the reset threshold, an internal
CC
down to
1V. Once V
noisy environment, connect a 0.1µF capacitor from MR
timer keeps
CC
RESETlow for the reset timeout period;
to ground to provide additional noise immunity (see
after this interval, RESETgoes high.
Figure 1).
If a brownout condition occurs (V
RESETgoes low. Any time V
CC
dips below the
reset threshold),
Applications Information
CC
goes
below the reset threshold, the internal timer resets to
Interfacing to µP with Bidirectional
zero, and RESETgoes low. The internal timer starts
Reset Pins
after V
CC
returns above the reset threshold, and RESET
Since the RESEToutput on the MAX6402/MAX6405 is
remains low for the reset timeout period.
open-drain, these devices interface easily with (µPs)
The manual reset input (MR) can also initiate a reset,
that have bidirectional reset pins. Connecting the µP
see the Manual Reset Inputsection. The MAX6401/
supervisor’s RESEToutput directly to the microcon-
MAX6404 have active-high RESET outputs that are the
troller’s (µC’s) RESETpin with a single pullup resistor
inverse of the MAX6400/MAX6402/MAX6403/MAX6405
allows either device to assert reset (Figure 2).
outputs (Figure 1).
Negative-Going VCC Transients
Manual Reset Input
These devices are relatively immune to short-duration,
Many µP-based products require manual reset capabil-
negative-going V
CC
transients (glitches).
ity, allowing the operator, a test technician, or external
The Typical Operating Characteristicsshow the
logic circuit to initiate a reset. A logic low on MRasserts
Maximum Transient Duration vs. Reset Threshold
reset. Reset remains asserted while MRis low, and for
Overdrive graph, for which reset pulses are not gener-
_______________________________________________________________________________________5
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
M
A
X
6
4
0
0
–
M
A
X
6
4
0
5
V
CC
V
TH
t
RD
t
RP
RESET
t
MR
t
RP
MR
Figure 1. Reset Timing Diagram
V
CC
V
CC
V
CC
µP
ated. The graph shows the maximum pulse width that a
negative going V
CC
transient may typically have when
issuing a reset signal. As the amplitude of the transient
increases, the maximum allowable pulse width
decreases.
Chip Information
TRANSISTOR COUNT: 512
PROCESS: BiCMOS
MAX6402/
MAX6405
MR
GND
RESET
RESET
INPUT
MOTOROLA
68HCXX
GND
Figure 2. Interfacing to µPs with Bidirectional Reset Pins
6_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
Table 1. Factory Trimmed Reset Thresholds*
Reset Threshold Voltage, V
TH
(V)
PARTSSUFFIX
T
A
= +25°CT
A
= -40°C to +85°C
MINTYPMAXMINMAX
22*2.1672.2002.2332.1452.250
23*2.2852.3202.3552.2622.375
242.3642.4002.4362.3402.460
252.4622.5002.5372.4372.562
MAX6400BS
MAX6401BS
26*2.5912.6302.6692.5642.692
MAX6402BS
272.6602.7002.7412.6332.768
282.7582.8002.8422.7302.870
29*2.8862.9302.9742.8573.000
302.9553.0003.0452.9253.075
31*3.0343.0803.1263.0033.150
333.2503.3003.3503.2173.383
343.3493.4003.4513.3153.485
353.4473.5003.5523.4123.587
363.5463.6003.6543.5103.690
373.6443.7003.7553.6073.792
M
AX6403BS
383.7433.8003.8573.7053.895
MAX6404BS
393.8413.9003.9583.8023.997
MAX6405BS
403.9404.0004.0603.9004.100
414.0384.1004.1613.9974.202
424.1374.2004.2634.0954.305
434.2354.3004.3644.1924.407
44*4.3144.3804.4464.2704.489
454.4324.5004.5674.3874.612
46*4.5604.6304.6994.5144.746
Factory-trimmed voltage thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
*Note: Parts marked with an asterisk (*) are standard versions.
_______________________________________________________________________________________7
MAX6400–MAX6405
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
M
A
X
6
4
0
0
–
M
A
X
6
4
0
5
Table 2. Device Marking Codes
PARTS
MAX6400BS31-T
MAX6400BS30-T
MAX6400BS29-T
MAX6400BS28-T
MAX6400BS27-T
MAX6400BS26-T
MAX6400BS25-T
MAX6400BS24-T
MAX6400BS23-T
MAX6400BS22-T
PARTS
MAX6403BS46-T
MAX6403BS45-T
MAX6403BS44-T
MAX6403BS43-T
MAX6403BS42-T
MAX6403BS41-T
MAX6403BS40-T
MAX6403BS39-T
MAX6403BS38-T
MAX6403BS37-T
MAX6403BS36-T
MAX6403BS35-T
MAX6403BS34-T
MAX6403BS33-T
TOP MARK
AAJ
AAI
AAH
AAG
AAF
AAE
AAD
AAC
AAB
AAA
TOP MARK
ACT
ACS
ACR
ACQ
ACP
ACO
ACN
ACM
ACL
ACK
ACJ
ACI
ACH
ACG
PARTS
MAX6401BS31-T
MAX6401BS30-T
MAX6401BS29-T
MAX6401BS28-T
MAX6401BS27-T
MAX6401BS26-T
MAX6401BS25-T
MAX6401BS24-T
MAX6401BS23-T
MAX6401BS22-T
PARTS
MAX6404BS46-T
MAX6404BS45-T
MAX6404BS44-T
MAX6404BS43-T
MAX6404BS42-T
MAX6404BS41-T
MAX6404BS40-T
MAX6404BS39-T
MAX6404BS38-T
MAX6404BS37-T
MAX6404BS36-T
MAX6404BS35-T
MAX6404BS34-T
MAX6404BS33-T
TOP MARK
ABV
ABU
ABT
ABS
ABR
ABQ
ABP
ABO
ABN
ABM
TOP MARK
ADH
ADG
ADF
ADE
ADD
ADC
ADB
ADA
ACZ
ACY
ACX
ACW
ACV
ACU
PARTS
MAX6402BS31-T
MAX6402BS30-T
MAX6402BS29-T
MAX6402BS28-T
MAX6402BS27-T
MAX6402BS26-T
MAX6402BS25-T
MAX6402BS24-T
MAX6402BS23-T
MAX6402BS22-T
PARTS
MAX6405BS46-T
MAX6405BS45-T
MAX6405BS44-T
MAX6405BS43-T
MAX6405BS42-T
MAX6405BS41-T
MAX6405BS40-T
MAX6405BS39-T
MAX6405BS38-T
MAX6405BS37-T
MAX6405BS36-T
MAX6405BS35-T
MAX6405BS34-T
MAX6405BS33-T
TOP MARK
ACF
ACE
ACD
ACC
ACB
ACA
ABZ
ABY
ABX
ABW
TOP MARK
ADV
ADU
ADT
ADS
ADR
ADQ
ADP
ADO
ADN
ADM
ADL
ADK
ADJ
ADI
UCSP Reliability
The chip-scale package (UCSP) represents a unique
packaging form factor that may not perform equally to a
packaged product through traditional mechanical reliabil-
ity tests. CSP reliability is integrally linked to the user’s
assembly methods, circuit board material, and usage
environment. The user should closely review these areas
when considering use of a CSP package. Performance
through Operating Life Test and Moisture Resistance
remains uncompromised as it is primarily determined by
the wafer-fabrication process.
Mechanical stress performance is a greater considera-
tion for a CSP package. CSPs are attached through
direct solder contact to the user’s PC board, foregoing
the inherent stress relief of a packaged product lead
frame. Solder joint contact integrity must be considered.
Information on Maxim’s qualification plan, test data, and
recommendations are detailed in the UCSP application
note, which can be found on Maxim’s website at
.
8_______________________________________________________________________________________
元器件交易网
µP Supervisory Circuits in 4-Bump (2
✕
2)
Chip-Scale Package
Package Information
S
P
E
.
2
x
2
P
S
C
U
,
L
4
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600______________________9
©2001 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products.
MAX6400–MAX6405