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ASM1816 Datasheet(PDF) 3 Page - Alliance Semiconductor Corporation

Part No. ASM1816
Description  Low Power 3.3V/3.0V uP Reset, Active LOW, Open-Drain Output
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Maker  ALSC [Alliance Semiconductor Corporation]
Homepage  http://www.alsc.com
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ASM1816 Datasheet(HTML) 3 Page - Alliance Semiconductor Corporation

   
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Notice: The information in this document is subject to change without notice
Low Power 3.3V/3.0V µP Reset
ASM1816
rev 1.4
February 2005
Application Information
Operation - Power Monitor
The ASM1816 detects out-of-tolerance power supply
conditions. It resets a processor during power-up, power-
down and issues a reset to the system processor when the
monitored power supply voltage is below the reset threshold.
When an out-of-tolerance VCC voltage is detected, the
RESET signal is asserted. On power-up, RESET is kept
active (LOW) for approximatley 150ms after the power supply
voltage has reached the selected tolerance. This allows the
power supply and microprocessor to stablize before RESET
is released.
tRPU
VCCTP (MIN)
VOH
VCCTP
VCCTP (MAX)
tR
VCC
RESET
Figure 1: Timing Diagram: Power-Up
VCCTP (MIN)
VCCTP
VCCTP (MAX)
tF
VCC
tRPD
VOL
RESET
Figure 2: Timing Diagram: Power-Down


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