RS5C372B-E2-F Datasheet, PDF (13/57 Pages) RICOH electronics devices division – I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC

RS5C372B
AC CHARACTERISTICS
 VDD2.0V (supports standard mode I²C bus)
Unless otherwise specified : VSS0V, Topt40 to 85, Crystal32.768kHz or 32.000kHz,
Input and Output Conditions:VIH0.8VDD,VIL=0.2VDD,VOL=0.2VDD,CL=50pF
Symbol
Item
Conditions
Min. Typ. Max. Unit
fSCL
SCL Clock Frequency
0
100 kHz
tLOW
SCL Clock “L” Time
4.7
s
tHIGH
SCL Clock “H” Time
4.0
s
tHD ; STA Start Condition Hold Time
4.0
s
tSU ; STO Stop Condition Setup Time
4.0
s
tSU ; STA Start Condition Setup Time
4.7
s
tSU ; DAT Data Setup Time
250
ns
tHDH ; DAT “H”Data Hold Time
0
ns
tHDL ; DAT “L”Data Hold Time
35
ns
tHDL ; DAT SDA “L”Stable Time After Falling of SCL
2.0
s
tPZ ; DAT SDA Off Stable Time After Falling of SCL
2.0
s
tR
Rising Time of SCL and SDA (Input)
1000 ns
tF
Falling Time of SCL and SDA (Input)
300
ns
tSP
Spike Width that can be Removed with
Input Filter
50
ns
S
SCL
SDA(IN)
tHD;STA
tLOW
tSU;DAT
tHIGH
Sr
tHD;STA
P
tSP
tHDH;DAT
tHDL;DAT
tSU;STA
tSU;STO
SDA(OUT)
tPL;DAT
tPZ;DAT
S Start condition
Sr Repeated start condition
P Stop condition
) For detailed information refer to “USAGES, 1.2 Transmission System of I²C bus.”
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