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ASM1233D Datasheet(PDF) 3 Page - Alliance Semiconductor Corporation

Part No. ASM1233D
Description  Low Power, 5V/3.3V, 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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ASM1233D 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, 5V/3.3V, µP Reset, Active LOW, Open-Drain Output
ASM1233D-L/D/M
rev 1.3
March 2005
Application Information
Operation - Power Monitor
The ASM1233D-L/1233D/1233M detects out-of-tolerance
power supply conditions. It resets a processor during power-
up, power-down and generates 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 approximately 350ms after
the power supply voltage has reached the selected tolerance.
This allows the power supply and microprocessor to stabilize
before RESET is released.
tRPU
VLTL
VOH
VCCTP
VHTL
tR
VCC
RESET
Figure 1: Timing Diagram: Power-Up
VLTL
VCCTP
VHTL
tF
VCC
tRPD
VOL
RESET
Figure 2: Timing Diagram: Power-Down


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