DS1339 I2C Serial Real-Time Clock
AC ELECTRICAL CHARACTERISTICS
(VCC = MIN to MAX, TA = -40°C to +85°C.) (Note 12)
PARAMETER
SYMBOL
CONDITION
Fast mode
MIN
TYP
MAX
400
UNITS
100
SCL Clock Frequency
fSCL
kHz
Standard mode
100
Fast mode
Standard mode
Fast mode
1.3
4.7
0.6
4.0
1.3
4.7
Bus Free Time Between a STOP
and START Condition
tBUF
tHD:STA
tLOW
ꢀs
ꢀs
ꢀs
ꢀs
ꢀs
ꢀs
ns
ns
ns
Hold Time (Repeated) START
Condition (Note 7)
Standard mode
Fast mode
Standard mode
LOW Period of SCL Clock
HIGH Period of SCL Clock
Fast mode
0.6
tHIGH
tSU:STA
tHD:DAT
tSU:DAT
tR
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
4.0
0.6
4.7
0
0
100
250
20 + 0.1CB
20 + 0.1CB
20 + 0.1CB
20 + 0.1CB
0.6
Setup Time for a Repeated
START Condition
0.9
Data Hold Time (Notes 8, 9)
Data Setup Time (Note 10)
300
1000
300
Rise Time of Both SDA and SCL
Signals (Note 11)
Fall Time of Both SDA and SCL
Signals (Note 11)
tF
300
Setup Time for STOP Condition
tSU:STO
CB
ꢀs
Standard mode
4.0
Capacitive Load for Each Bus
Line (Note 11)
400
10
pF
I/O Capacitance (SDA, SCL)
CI/O
tOSF
(Note 12)
(Note 13)
pF
Oscillator Stop Flag (OSF) Delay
100
ms
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DALLAS [ DALLAS SEMICONDUCTOR ]
