DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
POWER-UP/DOWN CHARACTERISTICS (3.3V)
(VCC = 3.3V M10%, TA = Over the operating range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
CE or WE at VIH, Before Power-
Down
tPD
0
ꢀs
VCC Fall Time: VPF(MAX) to VPF(MIN)
VCC Rise Time: VPF(MIN) to VPF(MAX)
VPF to RST High
tF
tR
300
0
ꢀs
ꢀs
tREC
tDR
35
ms
Expected Data-Retention Time
10
years
5, 6
(Oscillator ON)
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
MIN
TYP
MAX
14
10
UNITS
NOTES
pF
pF
CO
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