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