ASM809 Datasheet | Alliance Semiconductor Corporation

Description The ASM809/ASM810 are cost effective 3.0V, 3.3V and 5.0V power supply supervisor circuits optimized for low-power microprocessor (µP), microcontroller (µC) and digital systems. They provide a reset output during power-up, power-down and brown-out conditions. They provide excellent reliability by eliminating external ponents and adjustments. The ASM809/810 are improved drop-in replacements for the Maxim Six voltage thresholds are available to support 3V to 5V systems: RESET THRESHOLD Suffix L M J T S R Voltage 4.63 4.38 4.00 3.08 2.93 2.63 .. MAX809/810 and feature 60% lower supply current. A reset signal is issued if the power supply voltage drops below a preset reset threshold and is asserted for at least 140ms after the supply has risen above the reset threshold. The ASM809 has an active-low RESET output that is guaranteed to be in the correct logic state for VCC down to 1.1V. The ASM810 has an active-high RESET output. The reset parator is designed to ignore fast transients on VCC. Low supply current makes the ASM809/ASM810 ideal for use in portable and battery operated equipment. The ASM809/ASM810 are available in a pact, industry standard 3-pin SOT23 package. Features : - - - - - - Monitor 5V, 3.3V and 3V supplies 140ms min. reset pulse width Active-low reset valid with 1.1V supply (ASM809) Small 3-pin SOT-23 package No external ponents Specified over full temperature range - -40°C to 105°C Applications - - - - - - Embedded controllers Portable/Battery operated systems Intelligent instruments Wireless munication systems PDAs and handheld equipment puters Typical Operating Circuit VCC VCC µP RESET (RESET) GND RESET (RESET) Input GND Alliance Semiconductor 2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . .alsc. Notice: The information in this document is subject to change without notice October 2003 rev 1.0 ASM809, ASM810 Block Diagram SOT23 GND Pin Diagram ASM809 (ASM810) 3 VCC + + -...