X25644 Datasheet, PDF (11/15 Pages) Xicor Inc. – Programmable Watchdog Timer w/Serial E 2 PROM

X25644/46
X25324/26
X25164/66
CS vs. RESET/RESET Timing
CS
RESET
RESET
t _CST
t _WDO
t_RST
t_WDO
t _RST
Power Up and Down Timing Diagram
V_CC
V_RST
t_PURST
7029 FRM 11
RESET
RESET
RESET/RESET Output Timing
Symbol
t_WDO
t_CST
t_RST
t_PURST
V_RST
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
Power Up Reset Timeout
Reset Valid Voltage
Min.
100
450
1
400
100
100
1.0
Typ.
200
600
1.4
200
7029 FRM 12
Max.
300
800
2
300
350
Units
ms
ms
sec
ns
ms
ms
V
7029 FRM T15
11