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DS17885 데이터시트(PDF) 28 Page - Dallas Semiconductor

부품명 DS17885
상세설명  3V/5V Real-Time Clock
PDF  38 Pages
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제조업체  DALLAS [Dallas Semiconductor]
홈페이지  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS17885 데이터시트(HTML) 28 Page - Dallas Semiconductor

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RTC AC TIMING CHARACTERISTICS
Over the operating range (5V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Cycle Time
tCYC
240
DC
ns
Pulse-Width, RD / WR Low
PWRWL
120
ns
Pulse-Width, RD / WR High
PWRWH
80
ns
Input Rise and Fall Time
tR, tF
30
ns
Chip-Select Setup Time
before WR or RD
tCS
20
ns
Chip-Select Hold Time
tCH
0ns
Read Data Hold Time
tDHR
10
50
ns
Write Data Hold Time
tDHW
0ns
Muxed Address Valid Time to
ALE Fall
tASL
20
ns
Muxed Address Hold Time to
ALE fall
tAHL
10
ns
RD
or WR High Setup to
ALE Rise
tASD
25
ns
Pulse-Width ALE High
PWASH
40
ns
ALE Low Setup to RD or WR
Fall
tASED
30
ns
Output Data-Delay Time from
RD
tDDR
20
120
ns
6
Data Setup Time
tDSW
30
ns
IRQ
Release from RD
tIRD
2
ms
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



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