ASM1812

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 HIGH power-up reset
• Precision temperature-compensated voltage reference and comparator
• Eliminates external components
• TO-92 and compact surface mount SOT-23 package
• Push-Pull output for minimum current drain
• Operating temperature -40°C to +85°C



Application

• Set-top boxes
• Cellular phones
• PDAs
• Energy management systems
• Embedded control systems
• Printers
• Single board computers


Pinout

Specifications

Parameter	Min	Max	Unit
Voltage on VCC	-0.5	7	V
Voltage on RESET	-0.5	VCC + 0.5	V
Operating Temperature Range	-40	85	°C
Soldering Temperature (for 10 sec)		260	°C
Storage Temperature	-55	125	°C
ESD rating HBM MM		2 200	KV V
NOTE: These are stress ratings only and functional use is not implied. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability.

Description

The ASM1812 is a voltage supervisory device with low-power, 5V µP Reset, active HIGH, Push-Pull output. Maximum supply current over temperature is a low 20µA.
The ASM1812 issues an active HIGH reset signal whenever the monitored supply is out of tolerance. A precision reference and comparator circuit monitor power supply (V_CC) level. Tolerance level options are 5%, 10% and 15%. When an out-oftolerance condition is detected, an internal power-fail signal is generated which forces an active HIGH reset signal. After V_CC returns to an in-tolerance condition, the reset signal remains active for 150ms to allow the power supply and system microprocessor to stabilize.
The ASM1812 is designed with a push-pull output stage and operates over the extended industrial temperature range. Devices are available in TO-92 and compact surface mount SOT-23 packages.
Other low power products in this family include the ASM1810/11/15/16/17, ASM1233D and ASM1233M.