GENERAL DESCRIPTION

The ADM709 contains a power supply monitor which generates a system reset during power-up, power-down and brownout conditions. When VCC falls below the reset threshold, RESET goes low and holds the µP in reset. On power-up the RESET output is held low for 140 ms after VCC rises above the thresh old. The RESET output remains operational with VCC as low as 1 V.

Three supply-voltage threshold levels are available suitable for +5 V, +3.3 V and for +3 V supply monitoring. The actual reset voltage threshold is given below.

The ADM709 is available in 8-pin DIP and SOIC packages.

FEATURES

Precision Supply Voltage Monitor

+5 V, +3.3 V, +3 V Power Supply Monitor

35 mA Quiescent Current

140 ms (min) Power-On Reset Pulse

Low Cost

8-Pin DIP/SO Packages

Upgrade for MAX709

APPLICATIONS

Microprocessor Systems

Computers

Controllers

Intelligent Instruments

Critical μP Monitoring

Automotive Systems

Critical μP Power Monitoring