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X25045V-2.7 Datasheet(PDF) 11 Page - Xicor Inc.

Part # X25045V-2.7
Description  Programmable Watchdog Supervisory E2PROM
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Manufacturer  XICOR [Xicor Inc.]
Direct Link  http://www.xicor.com
Logo XICOR - Xicor Inc.

X25045V-2.7 Datasheet(HTML) 11 Page - Xicor Inc.

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


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