ADM6321AY31ARJZ-R7

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 through a manual reset input. Each device is available in a choice of 26 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, 1600 ms, and 25.6 sec (typical). Available in 5-lead SOT-23 packages and typically consume only 3 µA, making them suitable for use in low power portable applications.

Applications

• Microprocessor systems
• Computers and controllers
• Intelligent instruments
• Portable equipment

Key features

• 26 reset threshold options: 2.5 V to 5 V in 100 mV increments
• 4 reset timeout options: 1 ms, 20 ms, 140 ms, and 1120 ms (minimum)
• 4 watchdog timeout options: 6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)
• Manual reset input
• Reset output stages: Push-pull active low, Open-drain active low, Push-pull active high
• Low power consumption: 5 µA
• Guaranteed reset output valid to VCC = 1V
• Power supply glitch immunity
• Specified over industrial temperature range
• 5-lead SOT-23 package