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DS1831/A/B Datasheet

  • DS1831/A/B

  • Multisupply Micromonitor

  • 14頁

  • ETC

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DS1831/A/B
Multisupply Micromonitor
www.maxim-ic.com
FEATURES
摟
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摟
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5V power-on reset
3.3V (or 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擄C to +85擄C
DS1831A
IN
5V
RST
5V
TOL
5V
TD
5V
PBRST
5V
IN1
ST
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN
3.3V
RST
3.3V
TOL
3.3V
TD
3.3V
PBRST
3.3V
NMI1
WDS
TD
WD
PIN ASSIGNMENT
DS1831
IN
5V
RST
5V
TOL
5V
TD
5V
PBRST
5V
IN1
IN2
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN
3.3V
RST
3.3V
TOL
3.3V
TD
3.3V
PBRST
3.3V
NMI1
NMI2
MPBRST
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
DS1831B
IN
5V
RST
5V
TOL
5V
TD
5V
PBRST
5V
IN1
IN2
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN
3.3V
RST
3.3V
TOL
3.3V
TD
3.3V
PBRST
3.3V
NMI1
NMI2
MPBRST
16-Pin (300mil) DIP
&
16-Pin (150mil) SO
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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