
DS1851
15 of 18
AC ELECTRICAL CHARACTERISTICS
(-40
°C to +95°C, V
CC = 3.0V to 5.5V)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
NOTES
SCL Clock
Frequency
f
SCL
Fast Mode
Standard Mode
0
400
100
kHz
6
Bus Free Time
Between STOP and
START Condition
t
BUF
Fast Mode
Standard Mode
1.3
4.7
s
6
Hold Time (repeated)
START Condition
t
HD:STA
Fast Mode
Standard Mode
0.6
4.0
s
4, 6
Low Period of SCL
Clock
t
LOW
Fast Mode
Standard Mode
1.3
4.7
s
6
High Period of SCL
Clock
t
HIGH
Fast Mode
Standard Mode
0.6
4.0
s
6
Data Hold Time
t
HD:DAT
Fast Mode
Standard Mode
0
0.9
s
4, 5, 6
Data Setup Time
t
SU:DAT
Fast Mode
Standard Mode
100
250
ns
6
Start Setup Time
t
SU:STA
Fast Mode
Standard Mode
0.6
4.7
s
6
Rise Time of Both
SDA and SCL
Signals
t
R
Fast Mode
Standard Mode
20 + 0.1C
B
300
1000
ns
6
Fall Time of Both
SDA and SCL
Signals
t
F
Fast Mode
Standard Mode
20 + 0.1C
B
300
ns
6
Setup Time for STOP
Condition
t
SU:STO
Fast Mode
Standard Mode
0.6
4.0
s
Pulse Width of Spikes
that must be
Suppressed by the
Input Filter
tSP
Fast Mode
0
50
ns
I/O Capacitance
CI/O
10
pF
Capacitive Load for
Each Bus Line
C
B
400
pF
6
EEPROM Write
Time
tW
10
20
ms
7