DS17485E-3 View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated
Part Name
Description
MFG CO.
DS17485E-3 Datasheet PDF : 38 Pages
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RTC AC TIMING CHARACTERISTICS
PARAMETER
SYMBOL MIN
Cycle Time
tCYC
360
Pulse-Width, RD / WR Low
PWRWL
200
Pulse-Width, RD / WR High
PWRWH
150
Input Rise and Fall
tR, tF
Chip-Select Setup Time
Before WR or RD
tCS
20
Chip-Select Hold Time
tCH
0
Read Data Hold Time
Write Data Hold Time
tDHR
10
tDHW
0
Muxed Address Valid Time to
ALE Fall
tASL
40
Muxed Address Hold Time to
ALE Fall
tAHL
10
RD or WR High Setup to
ALE Rise
Pulse-Width ALE High
tASD
30
PWASH
40
ALE Low Setup to RD or WR
Fall
tASED
30
Output Data-Delay Time from
tDDR
20
RD
Data Setup Time
tDSW
70
IRQ Release from RD
tIRD
AC TEST CONDITIONS
Output Load: 50pF
Input Pulse Levels: 0V to 3.0V
Timing Measurement Reference Levels
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5ns
DS17485/DS17487
Over the operating range (3V)
TYP MAX UNITS NOTES
DC
ns
ns
ns
30
ns
ns
ns
90
ns
ns
ns
ns
ns
ns
ns
200
ns
6
ns
2
ms
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