ASM1233A

www.DataSheet4U.com November 2003 rev 1.0 ASM1233A Low Power, 3.3V, µP Reset, Active LOW, Open-Drain Output Embedded control systems Printers Single board computers General Description The ASM1233A is a voltage supervisor with low-power, 3.3V µP 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 (VCC) 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 active for 350ms to allow the power supply and system microprocessor to stabilize. Typical Operating Circuit VCC ASM1233A Microprocessor RESET RESET 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 GND Key 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 ref...