DS1308 Datasheet, PDF (5/16 Pages) Dallas Semiconductor – 64 X 8 Serial Real Time Clock

DS1308
Low-Current I²C RTC with 56-Byte NV RAM
SDA
tBUF
tLOW
SCL
tHD:STA
tR
STOP
START
NOTE: TIMING IS REFERENCED TO V_ILMAX AND V_IHMIN.
tHD:DAT
Figure 1. Data Transfer on I²C Serial Bus
tF
tHIGH
tSU:DAT
tHD:STA
tSU:STA
REPEATED
START
VCC
V_PF
tSP
tSU:STO
SCL
RECOGNIZED
SDA
VALID
tVCCF
Figure 2. Power-Up/Power-Down Timing
DON’T CARE
HIGH IMPEDANCE
tREC
tVCCR
RECOGNIZED
VALID
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