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| DS1747 Datasheet, PDF (12/18 Pages) Dallas Semiconductor – Y2K-Compliant, Nonvolatile Timekeeping RAMs | |||
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DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs
POWER-UP/DOWN AC CHARACTERISTICS (5V)
(VCC = 5.0V ±10%, TA = Over the Operating Range.)
PARAMETER
SYMBOL MIN TYP
CE or WE at VH
Before Power-Down
VCC Fall Time: VPF(MAX) to
VPF(MIN)
VCC Fall Time: VPF(MIN) to VSO
VCC Rise Time: VPF(MIN) to
VPF(MAX)
Power-Up Recover Time
Expected Data-Retention Time
(Oscillator ON)
tPD
0
tF
300
tFB
10
tR
0
tREC
tDR
10
MAX
35
UNITS
ms
ms
ms
ms
ms
years
NOTES
5, 6
POWER-UP/DOWN TIMING (5V DEVICE)
12 of 18
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