DS1258W-150-IND(2002) 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated
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DS1258W-150-IND Datasheet PDF : 9 Pages
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POWER-DOWN/POWER-UP CONDITION
DS1258W
POWER-DOWN/POWER-UP TIMING
PARAMETER
SYMBOL
VCC Fail Detect to CE and WE Inactive
tPD
VCC slew from VTP to 0V
tF
VCC slew from 0V to VTP
tR
VCC Valid to CE and WE Inactive
tPU
VCC Valid to End of Write Protection
tREC
MIN
150
150
TYP
(tA: See Note 10)
MAX UNITS NOTES
1.5
ms
11
ms
ms
2
ms
125
ms
PARAMETER
Expected Data Retention Time
SYMBOL MIN TYP
tDR
10
MAX
(tA = +25°C)
UNITS NOTES
years
9
WARNING:
Under no circumstance are negative undershoots, of any amplitude, allowed when device is in battery
backup mode.
7 of 9
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