X1202
Write Cycle Timing
SCL
SDA
8th Bit of Last Byte
ACK
t
WC
Stop
Start
Condition
Condition
Power Up Timing
Symbol
Parameter
Min.
Typ.(2)
Max.
Unit
ms
(1)
t
Time from power up to read
Time from power up to write
1
5
PUR
(1)
t
ms
PUW
Notes: (1) Delays are measured from the time V
is stable until the specified operation can be initiated. These parameters are periodically
CC
sampled and not 100% tested.
(2) Typical values are for T = 25°C and V = 5.0V
A
CC
Nonvolatile Write Cycle Timing
Symbol
Parameter
Min.
Typ.(1)
Max.
Unit
(1)
t
Write cycle time
5
10
ms
WC
Note: (1) t
is the time from a valid stop condition at the end of a write sequence to the end of the self-timed internal nonvolatile write cycle.
WC
It is the minimum cycle time to be allowed for any nonvolatile write by the user, unless Acknowledge Polling is used.
WATCHDOG TIMER/LOW VOLTAGE RESET OPERATING CHARACTERISTICS
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
Pre-programmed reset trip voltage
PTRIP
X1202-4.5A
X1202
X1202-2.7A
X1202-2.7
4.49
4.25
2.76
2.57
4.63
4.38
2.85
2.65
4.77
4.51
2.94
2.73
V
t
V
detect to RESET LOW
500
400
ns
ms
µs
µs
RPD
CC
t
Power up reset time out delay
100
10
200
PURST1
t
V
V
fall time
rise time
F
CC
t
10
R
CC
t
Watchdog timer period:
WD1 = 0, WD0 = 0
WD1 = 0, WD0 = 1
WD1 = 1, WD0 = 0
WDO
1.7
725
225
1.75
750
250
1.8
775
275
s
ms
ms
t
t
Watchdog reset time out delay
2-wire interface
225
1
250
275
ms
µs
V
RST1
RSP
V
Reset valid V
1.0
RVALID
CC
Characteristics subject to change without notice. 18 of 23
REV 1.1.8 5/17/01
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XICOR [ XICOR INC. ]
