18
FN8123.0
March 29, 2005
RESET Output Timing
V
TRIP
Programming Timing Diagram (WEL = 1)
V
TRIP
Programming Parameters
Symbol Parameter Min. Typ. Max. Unit
t
WDO
Watchdog Time Out Period,
WD1 = 1, WD0 = 1 (factory setting)
WD1 = 1, WD0 = 0
WD1 = 0, WD0 = 1
WD1 = 0, WD0 = 0
100
450
1
OFF
250
650
1.5
300
850
2
ms
ms
sec
t
RST
Reset Time Out 100 250 400 ms
Parameter Description Min. Max. Unit
t
VPS
V
TRIP
Program Enable Voltage Setup time 1 µs
t
VPH
V
TRIP
Program Enable Voltage Hold time 1 µs
t
TSU
V
TRIP
Setup time 1 µs
t
THD
V
TRIP
Hold (stable) time 10 ms
t
WC
V
TRIP
Write Cycle Time 10 ms
t
VPO
V
TRIP
Program Enable Voltage Off time (Between successive adjustments) 0 µs
t
RP
V
TRIP
Program Recovery Period (Between successive adjustments) 10 ms
V
P
Programming Voltage 15 18 V
V
TRAN
V
TRIP
Programmed Voltage Range 2.55 4.75 V
V
ta1
Initial V
TRIP
Program Voltage accuracy (V
CC
applied-V
TRIP
) (Programmed at 25°C.) -0.1 +0.4 V
V
ta2
Subsequent V
TRIP
Program Voltage accuracy [(V
CC
applied-V
ta1
)-V
TRIP
.
Programmed at 25°C.]
-25 +25 mV
V
tr
V
TRIP
Program Voltage repeatability (Successive program operations. Programmed at
25°C.)
-25 +25 mV
V
tv
V
TRIP
Program variation after programming (0-75°C). (Programmed at 25°C.) -25 +25 mV
V
TRIP
programming parameters are periodically sampled and are not 100% tested.
V
CC
(V
TRIP
)
WP
t
TSU
t
THD
t
VPH
t
VPS
V
P
V
TRIP
t
VPO
SCL
SDA
A0h
01h or 03h
t
RP
00h
00h
X4643, X4645