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DS1556_10 Datasheet, PDF (15/18 Pages) Maxim Integrated Products – 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM | |||
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DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
POWER-UP/DOWN CHARACTERISTICSâ5V
(VCC = 5.0V ï±10%, Over the Operating Range.)
PARAMETER
CE or WE at VIH, Before
Power-Down
SYMBOL
tPD
CONDITIONS
VCC Fall Time: VPF(MAX) to VPF(MIN)
VCC Fall Time: VPF(MIN) to VSO
VCC Rise Time: VPF(MIN) to VPF(MAX)
VPF to RST High
Expected Data-Retention Time
(Oscillator On)
tF
tFB
tR
tREC
tDR
(Notes 6, 7)
MIN
0
300
10
0
40
10
TYP
MAX
200
UNITS
ïs
ïs
ïs
ïs
ms
years
Figure 8. Power-Up/Down Waveform Timing (5V Device)
15 of 18
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