DS17285(1998) View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated
Part Name
Description
Manufacturer
DS17285 Datasheet PDF : 32 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 Time
tR, tF
Chip Select Setup Time Before
tCS
20
WR, or RD
Chip Select Hold Time
tCH
0
Read Data Hold Time
tDHR
10
Write Data Hold Time
tDHW
0
Muxed Address Valid Time to ALE tASL
40
Fall
Muxed Address Hold Time from
tAHL
10
ALE fall
RD or WR High Setup to ALE Rise tASD
30
Pulse Width ALE High
PWASH
40
ALE Low Setup to RD or WR Fall tASED
30
Output Data Delay Time from RD
tDDR
20
Data Setup Time
tDSW
60
IRQ Release from RD
tIRD
AC TEST CONDITIONS
Output Load: 50 pF
Input Pulse Levels: 0–3.0V
Timing Measurement Reference Levels
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5 ns
DS17285/DS17287
(0°C to 70°C; VCC = 3.0V ± 10%)
TYP
MAX
UNITS NOTES
DC
ns
ns
ns
30
ns
ns
ns
90
ns
ns
ns
ns
ns
ns
ns
200
ns
7
ns
2
µs
030598 21/32
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