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DS1744 Datasheet, PDF (12/18 Pages) Dallas Semiconductor – Y2K-Compliant, Nonvolatile Timekeeping RAMs
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DS1744/DS1744P 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 VIH Before Power-Down
tPD
0
VCC Fall Time: VPF(MAX) to VPF(MIN)
tF
300
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)
tFB
10
tR
0
tREC
tDR
10
MAX
35
UNITS NOTES
ms
ms
ms
ms
ms
years 5, 6
POWER-UP/DOWN TIMING (5V DEVICE)
12 of 18
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