September 2003
rev 1.0
ASM1233D
V
CC
V
CCTP
(MAX)
V
CCTP
V
CCTP
(MIN)
t
F
Application Information
Operation - Power Monitor
The ASM1233D 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
threshold. When an out-of-tolerance V
CC
voltage is detected,
the RESET signal is asserted. On power-up, RESET is kept
active (LOW) for approximatley 350ms after the power supply
voltage has reached the selected tolerance. This allows the
power supply and microprocessor to stablize before RESET
is released.
t
R
V
CCTP
(MAX)
V
CCTP
(MIN)
V
CCTP
RESET
t
RPD
V
OL
Figure 2: Timing Diagram: Power-Down
V
CC
t
RPU
V
OH
RESET
Figure 1: Timing Diagram: Power-Up
~
~
3 of 8
the monitored power supply voltage is below the reset
~
~
~
~
Low Power, 5µP Reset, Active LOW, Open-Drain Output
Notice: The information in this document is subject to change without notice
PULSECORE [ PulseCore Semiconductor ]
