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Maxim Integrated Semiconductor Electronic Components Datasheet

DS1831C Datasheet

3.3V/2.5V Multisupply MicroMonitor

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DS1831C/D/E
3.3V/2.5V Multisupply MicroMonitor
www.maxim-ic.com
FEATURES
§ 2.5V 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 IN2.5V input or the IN3.3V 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
(DS1831D)
§ 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
DS1831D
PIN ASSIGNMENT
DS1831C
IN2.5V
RST2.5V
TOL2.5V
TD2.5V
PBRST2.5V
IN1
1
2
3
4
5
6
16 IN3.3V
15 RST3.3V
14 TOL3.3V
13 TD3.3V
12 PBRST3.3V
11 NMI1
IN2 7
10 NMI2
GND 8
9 MPBRST
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
DS1831E
IN2.5V
RST2.5V
TOL2.5V
TD2.5V
PBRST2.5V
IN1
1
2
3
4
5
6
16 IN3.3V
15 RST3.3V
14 TOL3.3V
13 TD3.3V
12 PBRST3.3V
11 NMI1
IN2.5V
RST2.5V
TOL2.5V
TD2.5V
PBRST2.5V
IN1
1
2
3
4
5
6
16 IN3.3V
15 RST3.3V
14 TOL3.3V
13 TD3.3V
12 PBST
11 NMI1
ST 7
10 WDS
IN2 7
10 NMI2
GND 8
9 TDWD
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
GND 8
9 MPBRST
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
DESCRIPTION
The DS1831C multisupply monitor and reset monitors up to four system voltages: 2.5V 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 2.5V input. One of these inputs must be
greater than 1V for device operation. Pushbutton (manual reset) functionality is provided for the 2.5V
1 of 15
060303


Maxim Integrated Semiconductor Electronic Components Datasheet

DS1831C Datasheet

3.3V/2.5V Multisupply MicroMonitor

No Preview Available !

DS1831C/D/E
reset, the 3.3V reset or for all reset outputs by the master pushbutton. The DS1831D replaces one
reference comparator and the master pushbutton with watchdog and the DS1831E replaces the 3.3V
PBRST with a last reset status output.
TOL and TD inputs allow user configuration of the DS1831 for multiple applications. The TOL inputs
configure the tolerance for the specified output and the TD inputs configure the reset time delays.
PIN DESCRIPTION
IN2.5V
2.5V Power Supply Input
RST 2.5V
TOL2.5V
TD2.5V
PBRST 2.5V
IN1
IN2
ST
GND
2.5V Reset Open Drain
Output
Selects 2.5V Input
Tolerance
Selects 2.5V Reset Time
Delay
2.5V Reset Pushbutton
Sense Input 1
Sense Input 2 (DS1831C/E)
Watchdog Strobe Inputs
(DS1831D)
Ground
MPBRST
TDWD
NMI2
WDS
NMI1
PBRST 3.3V
PBST
TD3.3V
TOL3.3V
RST 3.3V
IN3.3V
Master Pushbutton (DS1831C/E)
Watchdog Time Delay Select
(DS1831D)
Non-maskable Interrupt 2 (DS1831C/E)
Watchdog Status Output (DS1831D)
Non-maskable Interrupt 1
3.3V Reset Pushbutton (DS1831C/E)
Pushbutton Status Output (DS1831E)
Select 3.3V Reset Time Delay
Selects 3.3V Input Tolerance
3.3V Reset Open Drain Output
3.3V Power Supply Input
2 of 15


Part Number DS1831C
Description 3.3V/2.5V Multisupply MicroMonitor
Maker Maxim Integrated
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DS1831C Datasheet PDF






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