ADM8322 Supervisory Circuit with Manual Reset, Active-Low Open-Drain and Active-High Push-Pull Reset Outputs

The ADM8316 / ADM8318 / ADM8319 / ADM8320 / ADM8321 / ADM8322 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. As well as providing power-on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. A reset signal can also be asserted by an external push-button switch through a manual reset input. The six devices feature different combinations of watchdog input, manual reset input, and output stage configuration.

Each device is available in a choice of 27 reset threshold options ranging from 2.5 V to 5 V in 100 mV increments. There are also four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms (minimum) and four watchdog timeout options of 6.3 ms, 102 ms, 1.6 sec, and 25.6 sec (typical).

The ADM8316 / ADM8318 / ADM8319 / ADM8320 / ADM8321 / ADM8322 are available in 5-lead SOT-23 packages and typically consume only 10 µA, making them suitable for use in low power, portable applications.

Applications

Automotive infotainment
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment

Features and Benefits

27 reset threshold options

2.5 V to 5 V in 100 mV increments

2.5 V to 5 V in 100 mV increments

4 reset timeout options

1 ms, 20 ms, 140 ms, and 1120 ms (minimum)

1 ms, 20 ms, 140 ms, and 1120 ms (minimum)

4 watchdog timeout options

6.3 ms, 102 ms, 1.6 sec, and 25.6 sec (typical)

6.3 ms, 102 ms, 1.6 sec, and 25.6 sec (typical)

Manual reset input

Multiple reset output options

Low power consumption

Specified over wide temperature range (−40°C to +125°C)

Qualified for automotive applications

5-lead SOT-23 package

Power Management

Data Sheets

Document	note
ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/ADM8322: Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 Data Sheet (Rev. B)	PDF 298.17 K