X40420 XICOR [Xicor Inc.], X40420 Datasheet - Page 20

• Manufacturer Part Number: X40420
• Description: Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch
• Manufacturer: XICOR [Xicor Inc.]

X40420/X40421 – Preliminary
RESET/RESET/MR Timings
LOW VOLTAGE AND WATCHDOG TIMINGS PARAMETERS (@25°C, VCC = 5V)
Note: (1) Based on characterization data.
REV 1.2.14 7/12/02
Symbol
V
t
t
t
RPD1
RPD2
t
PURST
RVALID
t
t
t
t
RPDL
t
t
WDO
RST1
RST2
LR
RSP
t
t
in1
t
MD
R
F
(1)
(1)
(1)
RESET
RESET
V
V
LOWLINE to RESET/RESET delay (Power down only) [= t
V
Power On Reset delay:
PUP1=0, PUP0=0
PUP1=0, PUP0=1 (factory default)
PUP1=1, PUP0=0
PUP1=1, PUP0=1
V
V
Reset Valid V
MR to RESET/ RESET delay (activation only)
Pulse width Suppression Time for MR
Watchdog Timer Period:
WD1=0, WD0=0
WD1=0, WD0=1
WD1=1, WD0=0
WD1=1, WD0=1 (factory default)
Watchdog Reset Time Out Delay
WD1=0, WD0=0
WD1=0, WD0=1
Watchdog Reset Time Out Delay WD1=1, WD0=0
Watchdog timer restart pulse width
MR
TRIP1
TRIP1
TRIP2
CC,
CC,
V
CC
V2MON Fall Time
V2MON Rise Time
to RESET/RESET (Power down only)
to LOWLINE
to V2FAIL
V
TRIP1
t
CC
R
V
RVALID
t
PURST
Parameters
t
MD
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t
RPD1
RPD1
-t
t
PURST
RPDL
Characteristics subject to change without notice.
]
Min.
12.5
500
100
20
20
50
1
1
400
800
200
Typ.
1.4
50
OFF
500
200
200
25
25
(1)
(1)
(1)
(1)
(1)
t
F
Max.
37.5
300
5
5
mV µs
mV µs
Unit
20 of 25
ms
ms
ms
ms
ms
ms
ms
ms
µs
ns
µs
ns
ns
µs
V
s