General Description

The ASM1810 is a voltage supervisor with low-power, 5V µP active LOW Reset, Push-Pull output. Maximum supply current over temperature is a low 20µA. The ASM1810 generates an active LOW reset signal whenever the monitored supply is out of tolerance. A precision reference and comparator circuit monitor power supply (VCC) level. Tolerance level options are 5%, 10% and 15%. When an out-of tolerance condition is detected, an internal power-fail signal is generated which forces an active LOW reset signal. After VCC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize.

Key Features

• Low Supply Current

•20 µA maximum (5.5 V)

• Automatically restarts a microprocessor after power failure

• 150ms reset delay after VCC returns to an in-tolerance condition

• Active LOW power-up reset

• Precision temperature-compensated voltage reference and comparator

• Eliminates external components

• Low cost TO-92 and compact surface mount SOT-23 package

• Push-Pull output for minimum current drain

• Operating temperature -40°C to +85°C

Applications

• Set-top boxes

• Cellular phones

• PDAs

• Energy management systems

• Embedded control systems

• Printers

• Single board computers