X4043/45
Power-Up and Power-Down Timing
V
TRIP
V
CC
t
0 Volts
PURST
t
PURST
t
F
t
R
t
RPD
V
RVALID
RESET
(X4043)
V
RVALID
RESET
(X4045)
RESET Output Timing
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
Reset trip point voltage, X4043/45-4.5A
Reset trip point voltage, X4043/45
Reset trip point voltage, X4043/45-2.7A
Reset trip point voltage, X4043/45-2.7
4.5
4.62
4.38
2.92
2.62
4.75
4.5
3.0
2.7
V
TRIP
4.25
2.85
2.55
t
Power-up reset time out
100
200
10
400
20
ms
µs
PURST
(8)
t
V
V
V
detect to RESET/RESET
fall time
RPD
CC
CC
CC
(8)
t
20
20
1
mV/µs
mV/µs
V
F
(8)
t
rise time
R
V
Reset valid V
CC
RVALID
t
Watchdog time out period,
WD1 = 1, WD0 = 0
WD1 = 0, WD0 = 1
WD1 = 0, WD0 = 0
WDO
100
450
1
200
600
1.4
300
800
2
ms
ms
sec
t
Watchdog Time Restart pulse width
Reset time out
1
µs
RSP
t
100
200
400
ms
RST
Notes: (8) This parameter is periodically sampled and not 100% tested.
Characteristics subject to change without notice. 17 of 25
REV 1.1.17 9/14/01
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XICOR [ XICOR INC. ]
