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DS1831, DS1831A, DS1831B
Multisupply MicroMonitor™
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Status
Active: In Production.
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 3.3V reset or for all reset outputs by the master pushbutton. The DS1831A replaces one reference comparator and the master pushbutton with watchdog and the DS1831B replaces the 3.3V 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.
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Data Sheet
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Key Features
- 5V power-on reset
- 3.3 (or 3V) power-on reset
- Two referenced comparators with separate outputs for monitoring additional supplies
- Internal power is drawn from higher of either the IN5V 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 (DS1831A)
- Precision temperature-compensated voltage reference and voltage sensor
- 16-pin DIP and 16-pin 150-mil SO available
- Operating Temperature of -40°C to +85°C
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Key Specifications:
| Supervisors (4 Monitored Voltages) |
| Part Number |
Interface |
Reset Thresh.
(V) |
Reset Out |
tRESET |
Watchdog Feature |
Watchdog Timeout |
Supervisor Features |
Reset Thresh. Accur.
(%) |
ICC
(µA) |
Budgetary Price |
| min |
@ +25°C |
max |
See Notes |
| DS1831A |
| Factory Fixed | | R/C Adjustable |
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| 15ms to 85ms | | 85ms to 300ms | | 300ms to 1s |
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| Input/Output (WDI/WDO) | | Pin Selectable |
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Manual Reset |
2.5 |
100 |
$2.99 @1k |
| DS1831B |
No Watchdog |
- |
$2.99 @1k |
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See All Supervisors (4 Monitored Voltages) (26)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Block Diagram
More Information
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Information Index
Rev 1;
2003-06-03
This page last modified: 2009-10-23
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