asm1811-5t Alliance Memory, Inc, asm1811-5t Datasheet - Page 3

• Manufacturer Part Number: asm1811-5t
• Description: Power Reset Active Open Drain Output
• Manufacturer: Alliance Memory, Inc

February 2005
rev 1.4
Application Information
Operation - Power Monitor
The ASM1811 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 V
RESET signal is asserted. On power-up, RESET is kept
active (LOW) for approximately 150ms after the power supply
voltage has reached the selected tolerance. This allows the
power supply and microprocessor to stabilize before RESET
is released.
Figure 1: Timing Diagram: Power-Up
RESET
V
CC
V
CCTP
(MIN)
t
CC
R
V
CCTP
Notice: The information in this document is subject to change without notice
voltage is detected, the
V
t
RPU
CCTP
(MAX)
V
OH
Low Power 5V µP Reset
RESET
V
CC
Figure 2: Timing Diagram: Power-Down
V
CCTP
(MAX)
V
CCTP
t
F
V
t
OL
RPD
V
CCTP
ASM1811
(MIN)
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