DS1689_05 Datasheet, PDF (27/36 Pages) Dallas Semiconductor – 3V/5V Serialized Real-Time Clocks with NV RAM Control

DS1689/DS1693
RTC AC TIMING CHARACTERISTICS—5V
(Over the operating range.)
PARAMETER
SYMBOL
Cycle Time
Pulse Width, RD/WR Low
Pulse Width, RD/WR High
t_CYC
PW_RWL
PW_RWH
Input Rise and Fall Time
t_R, t_F
Chip-Select Setup Time Before WR or RD
t_CS
Chip-Select Hold Time
t_CH
Read-Data Hold Time
t_DHR
Write-Data Hold Time
t_DHW
Muxed Address Valid Time to ALE Fall
t_ASL
Muxed Address Hold Time from ALE Fall
t_AHL
RD or WR High Setup to ALE Rise
t_ASD
Pulse Width, ALE High
ALE Low Setup to RD or WR Fall
Output Data Delay Time from RD
PW_ASH
t_ASED
t_DDR
Data Setup Time
t_DSW
IRQ Release from RD
t_IRD
CEI to CEO Delay
t_CED
MIN
305
125
150
20
0
10
0
30
10
25
60
40
20
100
TYP
MAX
DC
30
80
120
2
10
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
NOTES
9
DS1689/DS1693 BUS TIMING FOR WRITE CYCLE TO RTC AND RTC
REGISTERS
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