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| DS1744 Datasheet, PDF (13/18 Pages) Dallas Semiconductor – Y2K-Compliant, Nonvolatile Timekeeping RAMs | |||
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DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
POWER-UP/DOWN CHARACTERISTICS (3.3V)
(VCC = 3.3V ±10%, TA = Over the operating range.)
PARAMETER
SYMBOL MIN
CE or WE at VIH, Before Power-
Down
tPD
0
VCC Fall Time: VPF(MAX) to VPF(MIN)
tF
300
VCC Rise Time: VPF(MIN) to VPF(MAX)
tR
0
VPF to RST High
Expected Data-Retention Time
(Oscillator ON)
tREC
tDR
10
TYP
MAX UNITS NOTES
ms
ms
ms
35
ms
years 5, 6
POWER-UP/DOWN WAVEFORM TIMING (3.3V DEVICE)
CAPACITANCE
(TA = +25°C)
PARAMETER
Capacitance On All Input Pins
Capacitance On All Output Pins
SYMBOL
CIN
CO
MIN
TYP
MAX
14
10
UNITS
pF
pF
NOTES
13 of 18
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