(PDF) MAX837 Datasheet PDF | Maxim





MAX837 Datasheet PDF

Part Number MAX837
Description 4-Pin Micropower Voltage Monitors
Manufacture Maxim
Total Page 6 Pages
PDF Download Download MAX837 Datasheet PDF

Features: Datasheet pdf 19-1137; Rev 0; 9/96 4-Pin Micropower V oltage Monitors _______________General Description The MAX836/MAX837 micropowe r voltage monitors contain a 1.204V pre cision bandgap reference and a comparat or in a SOT143 package. The MAX836 has an open-drain, N-channel output driver, while the MAX837 has a push-pull outpu t driver. Two external resistors set th e trip threshold voltage. ____________ ________________Features o ±1.25% Prec ision Voltage Threshold o SOT143 Packag e o Low Cost o <5µA Typical Supply Cur rent o Open-Drain Output (MAX836) Push- Pull Output (MAX837) MAX836/MAX837 __ ______________________Applications Prec ision Battery Monitor Load Switching Ba ttery-Powered Systems Threshold Detecto rs ______________Ordering Information PART* MAX836EUS-T MAX837EUS-T TEMP. RAN GE -40°C to +85°C -40°C to +85°C PI NMARKING PACKAGE CODE 4 SOT143 4 SOT143 AAEQ AAER *All devices available in t ape-and-reel only. Contact factory for availability. __________Typical Operating Circuit VCC MAX836 ONLY GN.

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MAX837 datasheet
19-1137; Rev 0; 9/96
4-Pin Micropower Voltage Monitors
_______________General Description
The MAX836/MAX837 micropower voltage monitors
contain a 1.204V precision bandgap reference and a
comparator in a SOT143 package. The MAX836 has an
open-drain, N-channel output driver, while the MAX837
has a push-pull output driver. Two external resistors set
the trip threshold voltage.
____________________________Features
o ±1.25% Precision Voltage Threshold
o SOT143 Package
o Low Cost
o <5µA Typical Supply Current
o Open-Drain Output (MAX836)
Push-Pull Output (MAX837)
________________________Applications
Precision Battery Monitor
Load Switching
Battery-Powered Systems
Threshold Detectors
______________Ordering Information
PART*
TEMP. RANGE
PIN- MARKING
PACKAGE CODE
MAX836EUS-T -40°C to +85°C 4 SOT143
MAX837EUS-T -40°C to +85°C 4 SOT143
AAEQ
AAER
*All devices available in tape-and-reel only. Contact factory for
availability.
__________Typical Operating Circuit
VCC
GND
1.204V
REF
MAX836
ONLY
OUT
VCC VCC
MAX836
MAX837
IN
0.1µF
__________________Pin Configuration
TOP VIEW
GND 1
MAX836
MAX837
4 OUT
VCC 2
3 IN
SOT-143
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

MAX837 datasheet
4-Pin Micropower Voltage Monitors
ABSOLUTE MAXIMUM RATINGS
VCC, OUT to GND (MAX836) ....................................-0.3V to 12V
IN, OUT to GND (MAX837).........................-0.3V to (VCC + 0.3V)
Input Current
VCC .................................................................................20mA
IN.....................................................................................10mA
Output Current, OUT...........................................................20mA
Rate of Rise, VCC ............................................................100V/µs
Continuous Power Dissipation
SOT143 (derate 4mW/°C above +70°C) ......................320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+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
(VCC = +2.5V to +11.0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Operating Voltage Range
(Note 1)
VCC
2.5 11 V
Supply Current (Note 2)
Trip Threshold Voltage
Trip Threshold Voltage
Hysteresis
VIN = 1.16V, VCC = 3.6V
OUT = low
TA = +25°C
TA = TMIN to TMAX
ICC VCC = full operating range
VIN = 1.25V, VCC = 3.6V
OUT = high
TA = +25°C
TA = TMIN to TMAX
VCC = full operating range
TA = +25°C
VTH VIN falling TA = 0°C to +70°C
1.185
1.169
VHYST VCC = 5V, IN = low to high
3.5
2.0
1.204
1.204
6
6.5
10
15
5.0
8.0
13
1.215
1.231
µA
V
mV
IN Operating Voltage Range
(Note 1)
VIN
VCC - 1 V
IN Leakage Current (Note 3)
Propagation Delay
Glitch Immunity
OUT Rise Time
OUT Fall Time
Output Leakage Current
(Note 4)
IIN
tPL
tRT
tFT
ILOUT
VIN = VTH
VCC = 5.0V, 50mV overdrive
VCC = 5.0V, 100mV overdrive
VCC = 5.0V, no load (MAX837 only)
VCC = 5.0V, no load (MAX836 pull-up = 10k)
VIN > VTHMAX (MAX836 only)
±3 ±12 nA
80 µs
35 µs
260 ns
680 ns
±1 µA
Output Voltage High
Output Voltage Low
VOH
VOL
VIN > VTHMAX, ISOURCE = 500µA (MAX837 only)
VIN < VTHMIN, ISINK = 500µA
VCC - 0.5
V
0.4 V
Note 1: The voltage-detector output remains in the direct state for VCC down to 1.2V when VIN VCC / 2.
Note 2: Supply current has a monotonic dependence on VCC (see Typical Operating Characteristics).
Note 3: IN leakage current has a monotonic dependence on VCC (see Typical Operating Characteristics).
Note 4: The MAX836 open-drain output can be pulled up to a voltage greater than VCC, but may not exceed 11V.
2 _______________________________________________________________________________________




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