DS1831A Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Multisupply Micromonitor

www.maxim-ic.com
FEATURES
§ 5V power-on reset
§ 3.3V power-on reset
§ Two referenced comparators with separate
outputs for monitoring additional supplies
§ Internal power is drawn from higher of either
the IN_5V input or the IN_3.3V input
§ Excellent for systems designed to operate
with multiple power supplies
§ Asserts resets during power transients
§ Pushbutton reset input for system override
§ Maintains reset for user configurable times
of 10ms, 100ms, or 1s
§ Watchdog timer for software monitoring
(DS1831A)
§ Precision temperature-compensated voltage
reference and voltage sensor
§ 16 pin DIP and 16 pin 150mil SO available
§ Operating Temperature of -40°C to +85°C
DS1831A
DS1831/A/B
Multisupply Micromonitor
PIN ASSIGNMENT
DS1831
IN_5V 1
RST_5V 2
TOL_5V 3
TD_5V 4
PBRST_5V 5
IN1 6
16
IN_3.3V
15 RST_3.3V
14 TOL_3.3V
13
TD_3.3V
12 PBRST_3.3V
11 NMI1
IN2 7
10 NMI2
GND 8
9 MPBRST
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
DS1831B
IN_5V 1
RST_5V 2
16
IN_3.3V
15 RST_3.3V
TOL_5V 3
TD_5V 4
14 TOL_3.3V
13
TD_3.3V
PBRST_5V 5
IN1 6
12 PBRST_3.3V
11 NMI1
ST 7
10 WDS
GND 8
9 TD_WD
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
IN_5V 1
16
IN_3.3V
RST_5V 2
TOL_5V 3
TD_5V 4
PBRST_5V 5
15 RST_3.3V
14
TOL_3.3V
13
TD_3.3V
12 PBST
IN1 6
11 NMI1
IN2 7
10 NMI2
GND 8
9 MPBRST
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
DESCRIPTION
The DS1831 multisupply monitor and reset monitors up to four system voltages: 5V supply, 3.3V (or 3V)
supply, and two additional user configurable voltage monitors. DS1831 power for internal operation
comes from the higher voltage level of the 3.3V input or the 5V input. One of these inputs must be greater
than 1V for device operation. Pushbutton (manual reset) functionality is provided for the 5V reset, the
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