asm1817-5t Alliance Memory, Inc, asm1817-5t Datasheet - Page 3

• Manufacturer Part Number: asm1817-5t
• Description: Power, 3.3v/3.0v Reset, Active High, Push-pull Output
• Manufacturer: Alliance Memory, Inc

February 2005
rev 1.5
Application Information
Operation - Power Monitor
The ASM1817 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 (HIGH) 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.
Figure 1: Typical Application
ASM1817
RESET
CC
Notice: The information in this document is subject to change without notice
voltage is detected, the
Microprocessor
RESET
Low Power, 3.3V/3.0V µP Reset
RESET
V
RESET
CC
Figure 3: Timing Diagram: Power-Down
Figure 2: Timing Diagram: Power-Up
V
V
CC
CCTP
(MAX)
V
CCTP
V
V
tF
OH
CCTP
t
RPD
V
(MIN)
CCTP
(MIN)
RESET Slews with V
t
R
V
CCTP
V
t
RPU
ASM1817
CCTP
(MAX)
V
OL
CC
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