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DS1644LPM Datasheet(PDF) 8 Page - Dallas Semiconductor

Part # DS1644LPM
Description  Nonvolatile Timekeeping RAM?
PDF  11 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1644LPM Datasheet(HTML) 8 Page - Dallas Semiconductor

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DS1644LPM
041697 8/11
AC ELECTRICAL CHARACTERISTICS (POWER–UP/DOWN TIMING)
(0
°C to 70°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
CE or WE at VIH before Power–
Down
tPD
0
µs
VPF (Max) to VPF (Min) VCC Fall
Time
tF
300
µs
VPF (Min) to VSO VCC Fall Time
tFB
10
µs
VSO to VPF (Min) VCC Rise Time
tRB
1
µs
VPF (Min) to VPF (Max) VCC Rise
Time
tR
0
µs
Power–Up
tREC
15
25
35
ms
Expected Data Retention Time
(Oscillator On)
tDR
10
years
4
DS1644L READ CYCLE TIMING
tRC
tRC
tWC
READ
READ
WRITE
tAH
tAS
tWEW
VALID IN
VALID OUT
VALID OUT
tOEZ
tAA
tOH
tCEA
tCEL
tOEA
tOEL
A0–A14
CE
OE
WE
DQ0–DQ7
tWR



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