Rainbow Electronics DS1631 - Manual (Page 13)

DS1631
13 of 14
EEPROM AC ELECTRICAL CHARACTERISTICS
(-55°C to +100°C; V
DD
= 2.7V to 5.5V)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
EEPROM Write Cycle Time t
wr
4 10 ms
EEPROM Writes N
EEWR
-55°C to +55°C 50k writes
EEPROM Data Retention t
EEDR
-55°C to +55°C 10 years
AC ELECTRICAL CHARACTERISTICS (-55°C to +125°C; V
DD
= 2.7V to 5.5V)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTES
9-bit resolution 93.75
10-bit resolution 187.5
11-bit resolution 375
Temperature
Conversion Time t
TC
12-bit resolution 750
ms
SCL Frequency f
SCL
0 400 kHz
Bus Free Time
Between a STOP and
START Condition t
BUF
1.3 µs 1
START and Repeated
START Hold Time
from Falling SCL t
HD:STA
0.6 µs 1, 2
Low Period of SCL t
LOW
1.3 µs 1
High Period of SCL t
HIGH
0.6 µs 1
Repeated START
Condition Setup Time
to Rising SCL t
SU:STA
0.6 µs 1
Data-Out Hold Time
from Falling SCL t
HD:DAT
0 0.9 µs 1
Data-In Setup Time to
Rising SCL t
SU:DAT
100 ns 1
Rise Time of SDA and
SCL t
R
20 +
0.1C
B
1000 ns 1, 3
Fall time of SDA and
SCL t
F
20 +
0.1C
B
300 ns 1, 3
STOP Setup Time to
Rising SCL t
SU:STO
0.6 µs 1
Capacitive Load for
each Bus Line C
B
400 pF
I/O Capacitance C
I/O
10 pF
Input Capacitance C
I
5 pF
Spike Pulse Width that
can be Suppressed by
Input Filter t
SP
0 50 ns
All values referenced to V
IH
= 0.9 V
DD
and V
IL
= 0.1 V
DD
.
NOTES:
1) See timing diagram in Figure 8.
2) After this period the first clock pulse is generated.
3) For example, if C
B
= 300pF, then t
R
[min] = t
F
[min] = 50ns.