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ASM1832 Datasheet, PDF (6/9 Pages) Alliance Semiconductor Corporation – 3.3V UP Power Supply Monitor and Reset Circuit
◁
October 2006
rev 1.6
ASM1832
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Watchdog Timeout Period
tTD
TD = VCC
500
1200
2000
ms
Watchdog Timeout Period
tTD
TD Floating
250
610
1000
ms
Output Voltage
VOH
I=-500µA, VCC < 2.7.V Note
1
VCC - 0.3V
VCC - 0.1V
V
Output Current
IOH
Output = 2.4V, VCC >=2.7V
350
µA
Output Current
IOL
Output = 0.4V, VCC >=2.7V
10
mA
Input Leakage
IIL
-1.0
1.0
µA
RESET Low Level
VOL
Note 1
0.4
V
Internal Pull-up Resistor
PBRST pin
40
kΩ
Operating Current
ICC1
Outputs open, VCC <= 3.6V
and all inputs at VCC or GND
20
µA
Input Capacitance
CIN
5
pF
Output Capacitance
COUT
7
pF
PBRST Manual Reset
Minimum Low Time
tPB
PBRST = VIL
20
ms
Reset Active Time
tRST
250
610
1000
ms
Must not exceed tRD mini-
ST Pulse Width
tST
mum. Watchdog cannot be
20
ns
disabled.
VCC Fail Detect to RESET or
RESET
tRPD
Pulses < 2 µs at VCCTP min-
imum will not cause reset
5
8
µs
VCC Slew Rate
tF
20
µs
PBRST Stable LOW to
RESET and RESET Active
tPDLY
20
ms
VCC Detect to RESET or
RESET inactive
tRPU
trise=5µs
250
610
1000
ms
VCC Slew Rate
tR
0
ns
Notes
1. RESET remains within 0.5V of VCC on power-down until VCC falls below 2V. RESET remains within 0.5V of ground on power-down until VCC
falls below 2.0V.
3.3V µP Power Supply Monitor and Reset Circuit
Notice: The information in this document is subject to change without notice
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