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參數(shù)資料
| 型號(hào)： | VT82885 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Real Time Clock |
| 中文描述： | 實(shí)時(shí)時(shí)鐘 |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 72K |
| 代理商： | VT82885 |
16
VT82885
Real Time Clock
VIA Technologies, Inc.
CURRENT SUPPLIED
FROM EXTERNAL
LITHIUM ENERGY CELL
t
R
CS#
t
F
V
BAT
4.5V
V
CC
t
REC
DATA RETENTION
t
DR
t
PD
POWER DOWN/POWER UP TIMING
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
CS# at V
IH
before Power-Down
t
PD
0
μ
s
V
CC
slew from 4.5V to 0V
(CS# at V
IH
)
V
CC
slew from 0V to 4.5V
(CS# at V
IH
)
CS# at V
IH
after Power-Up
t
F
300
μ
s
t
R
100
μ
s
t
REC
20
200
ms
(tA = 25
°
C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Expected Data Retention
t
DR
10
years
NOTE
The real time clock will keep time to an
accuracy of
±
1 minute per month during data
retention time for the period of t
DR
.
WARNING
Under no circumstances are negative
undershots, of any amplitude, allowed when
device is in battery backup mode.
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