GENERAL DESCRIPTION

The ADM8611/ADM8616/ADM8617/ADM8618 are supervisory circuits which monitor power supply voltage levels and code execution integrity in microprocessor-based systems. A power-on-reset signal is generated when the supply voltage rises to a preset threshold level. The ADM8611’s debounced manual reset input can be used to initiate a reset by means of an external push-button or logic signal. The ADM8616–ADM8618 have an on-chip watchdog timer which can reset the microprocessor if it fails to strobe within a preset timeout period.

FEATURES

Precision 1.8V to 5V Power Supply Monitoring

9 Reset Threshold Options:

1.58V to 4.63V

140ms (Min) Reset Timeout

Manual Reset Input (ADM8611)

Watchdog Timer (ADM8616–ADM8618)

Reset Output Stages

Push-Pull Active-Low

Open-Drain Active-Low

Push-Pull Active-High

Low Power Consumption (3µA)

Guaranteed Reset Output valid to VCC=1V

Power Supply Glitch Immunity

Specified Over -40°C to +85°C Temperature Range

4-Lead SC70 Package

APPLICATIONS

Microprocessor Systems

Computers

Controllers

Intelligent Instruments

Portable Equipment