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DS1553 Datasheet, PDF (13/19 Pages) Maxim Integrated Products – 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
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DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
POWER-UP/DOWN CHARACTERISTICS
(VCC = 5.0V ±10%, over the operating range.)
PARAMETER
SYMBOL
MIN
TYP
MAX UNITS NOTES
CE or WE at VIH, Before Power-Down
tPD
0
ms
VCC Fall Time: VPF(MAX) to VPF(MIN)
tF
300
ms
VCC Fall Time: VPF(MIN) to VSO
tFB
10
ms
VCC Rise Time: VPF(MIN) to VPF(MAX)
tR
0
ms
VPF to RST High
Expected Data Retention Time
(Oscillator On)
tREC
40
tDR
10
200
ms
years
6, 7
Figure 8. Power-Up/Down Waveform Timing 5V Device
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