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| X25043 Datasheet, PDF (11/15 Pages) Xicor Inc. – Programmable Watchdog Supervisory E2PROM | |||
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X25043/45
Power-Up and Power-Down Timing
VCC
VTRIP
0 Volts
tR
RESET (X25043)
tPURST
tPURST
VTRIP
tF
tRPD
RESET (X25045)
3844 FHD F13.1
RESET Output Timing
Symbol
Parameter
VTRIP
tPURST
tRPD(5)
tF(5)
tR(5)
VRVALID
Reset Trip Point Voltage, 5V Device
Reset Trip Point Voltage, 2.7V Device
Power-up Reset Timeout
VCC Detect to Reset/Output
VCC Fall Time
VCC Rise Time
Reset Valid VCC
Notes: (5) This parameter is periodically sampled and not 100% tested.
CS vs RESET/RESET Timing
CS
tCST
RESET
Min.
4.25
2.55
100
10
0
1
tWDO
tRST
tWDO
tRST
RESET
3844 FHD F14.1
RESET/RESET Output Timing
Symbol
tWDO
tCST
tRST
Parameter
Watchdog Timeout Period,
WD1=1,WD0=0
WD1=0,WD0=1
WD1=0,WD0=0
CS Pulse Width to Reset the Watchdog
Reset Timeout
Min.
100
450
1
400
100
Typ.
Typ.
200
600
1.4
Max.
4.5
2.7
400
500
Units
V
V
ms
ns
µs
ns
V
3844 PGM T14.3
Max.
300
800
2
400
Units
ms
ms
sec
ns
ms
3844 PGM T15.3
11
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