X4643 XICOR [Xicor Inc.], X4643 Datasheet - Page 17

• Manufacturer Part Number: X4643
• Description: CPU Supervisor with 64K EEPROM
• Manufacturer: XICOR [Xicor Inc.]

X4643/5 – Preliminary Information
Power-Up and Power-Down Timing
RESET Output Timing
Notes: (8) This parameter is periodically sampled and not 100% tested.
SDA vs. RESET Timing
REV 1.26 4/30/02
Symbol
V
t
t
V
PURST
RVALID
RPD
t
t
TRIP
R
F
(8)
(8)
(8)
RESET
(X4643)
RESET
(X4645)
V
CC
RESET
SDA
SCL
0 Volts
Reset Trip Point Voltage, X4643/5-4.5A
Reset Trip Point Voltage, X4643/5
Reset Trip Point Voltage, X4643/5-2.7A
Reset Trip Point Voltage, X4643/5-2.7
Power-up Reset Time Out
V
V
V
Reset Valid V
CC
CC
CC
Detect to Reset/Output
Fall Time
Rise Time
V
TRIP
CC
t
R
Note: All inputs are ignored during the active reset period (t
t
RSP
t
t
RSP
PURST
<t
Parameter
WDO
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t
RPD
t
RSP
>t
WDO
t
PURST
Min.
4.25
2.85
2.55
100
100
100
4.5
1
t
RST
Characteristics subject to change without notice.
RST
).
Typ.
4.62
4.38
2.92
2.62
250
t
RSP
>t
WDO
V
RVALID
V
t
Max.
F
RVALID
4.75
400
500
4.5
3.0
2.7
t
RST
Unit
ms
ns
µs
µs
V
V
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