ASM1233M

Features:

• Low Supply Current
   •20 µA maximum (5.5 V)
   •15µA maximum (3.6 V)
• Automatically restarts a microprocessor after power failure
• 350ms reset delay after VCC returns to an in-tolerance condition
• Active LOW power-up reset, 5kΩ internal pull-up
• Precision temperature-compensated voltage reference and comparator
• Eliminates external components
• Low-cost TO-92 package
• Compact surface mount SO-8 package
• 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
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 ASM1233M is a voltage supervisor with low-power, 5V µP Reset, with an active LOW, open-drain output. Maximum supply current over temperature is a low 20µA.

The ASM1233M 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% ,and 10% for a 5V power supply. The tolerance is 15% for the 3.3V, ASM1233M. 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 350ms to allow the power supply and system microprocessor to stabilize.

The ASM1233M is designed with a open-drain output stage and operates over the extended industrial temperature range. Devices are available in compact surface mount SO-8 packages and 3-lead TO-92 packages.
Other low power products in this family include the ASM1810/11/12/15/16/17 and ASM1233D.