ASM1233A

Features:

• Low Supply Current
  •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 SOT-223 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 ASM1233A is a voltage supervisor with low-power, 3.3VµP Reset, with an active LOW, open-drain output. Maximum supply current over temperature is a low 15µA.

The ASM1233A generates an active LOW reset signal whenever the monitored supply is out of tolerance. A precision reference and comparator circuit monitor power supply (V_CC) level. The tolerance is 15% for the 3.3V, ASM1233A.

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 of ASM1233A active for 350ms to allow the power supply and system microprocessor to stabilize.

The ASM1233A is designed with a open-drain output stage and operates over the extended industrial temperature range. Devices are available in compact SOT-223 packages.

Other low power products in this family include the ASM1810/11/12/15/16/17, ASM1233D, and ASM1233M