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参数资料
| 型号： | 12C887 |
| 英文描述： | Test Prod Wire; Conductor Size AWG:18; No. Strands x Strand Size:65 x 36; Jacket Color:Black; Conductor Material:Copper; Jacket Material:Rubber; Leaded Process Compatible:Yes; Number of Conductors:1 RoHS Compliant: Yes |
| 中文描述： | 实时时钟 |
| 文件页数： | 10/19页 |
| 文件大小： | 193K |
| 代理商： | 12C887 |
DS12C887
18 of 19
POWER DOWN / POWER UP TIMING
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
CS
at VIH before Power-
Down
tPD
0
s
VCC slew from 4.5V to 0V
( CS at VIH)
tF
4.0 ≤ VCC ≤ 4.5V
300
s
VCC slew from 0V to 4.5V
( CS at VIH)
tR
100
s
CS
at VIH after Power-Up
tREC
20
200
ms
Expected Data Retention
tDR
10
years
10,11
(tA=25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Expected Data Retention
tDR
10
years
10,11
Note:
The real time clock will keep time to an accuracy of
±1 minute per month during data retention time for
the period of tDR.
Warning:
Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery
back-up mode.
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