
DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
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POWER-UP/DOWN CHARACTERISTICS—3.3V
(VCC = 3.3V ±10%, TA = Over the Operating Range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
CE or WE at VH, Before
Power-Down
tPD
0
s
VCC Fall Time: VPF(MAX) to
VPF(MIN)
tF
300
s
VCC Rise Time: VPF(MIN) to
VPF(MAX)
tR
0
s
VPF to RST High
tREC
35
ms
Expected Data-Retention Time
(Oscillator ON)
tDR
10
years
5, 6
POWER-UP/DOWN WAVEFORM TIMING (3.3V DEVICE)
CAPACITANCE
(TA = +25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Capacitance on All Input Pins
CIN
14
pF
Capacitance on All Output Pins
CO
10
pF