DS1339 Datasheet, PDF (4/18 Pages) Dallas Semiconductor – Serial Real-Time Clock

AC ELECTRICAL CHARACTERISTICS
(V_CC = MIN to MAX, T_A = -40°C to +85°C.) (Note 12)
PARAMETER
SYMBOL
CONDITION
SCL Clock Frequency
Fast mode
f_SCL
Standard mode
Bus Free Time Between a STOP
and START Condition
Hold Time (Repeated) START
Condition (Note 7)
LOW Period of SCL Clock
t_BUF
t_HD:STA
t_LOW
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
HIGH Period of SCL Clock
t_HIGH
Fast mode
Standard mode
Setup Time for a Repeated
START Condition
Data Hold Time (Notes 8, 9)
Data Setup Time (Note 10)
Rise Time of Both SDA and SCL
Signals (Note 11)
Fall Time of Both SDA and SCL
Signals (Note 11)
Setup Time for STOP Condition
t_SU:STA
t_HD:DAT
t_SU:DAT
t_R
t_F
t_SU:STO
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Capacitive Load for Each Bus
Line (Note 11)
C_B
I/O Capacitance (SDA, SCL)
C_I/O
(Note 12)
Oscillator Stop Flag (OSF) Delay
t_OSF
(Note 13)
DS1339 I²C Serial Real-Time Clock
MIN
TYP
100
1.3
4.7
0.6
4.0
1.3
4.7
0.6
4.0
0.6
4.7
0
0
100
250
20 + 0.1C_B
20 + 0.1C_B
20 + 0.1C_B
20 + 0.1C_B
0.6
4.0
100
MAX
400
100
UNITS
kHz
ms
ms
ms
ms
ms
0.9
ms
ns
300
ns
1000
300
ns
300
ms
400
pF
10
pF
ms
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