參數(shù)資料
型號(hào): BQ3285ECS
英文描述: Real-Time Clock
中文描述: 實(shí)時(shí)時(shí)鐘
文件頁(yè)數(shù): 21/26頁(yè)
文件大小: 831K
代理商: BQ3285ECS
21
bq3285EC/LC
July 1996
Power-Down/Power-Up Timing—bq3285EC
(T
A
= T
OPR
)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Conditions
t
F
V
CC
slew from 4.5V to 0V
300
-
-
μ
s
t
R
V
CC
slew from 0V to 4.5V
100
-
-
μ
s
t
CSR
CS at V
IH
after power-up
20
-
200
ms
Internal write-protection
period after V
CC
passes V
PFD
on power-up.
Caution:
Negative undershoots below the absolute maximum rating of -0.3V in battery-backup mode
may affect data integrity.
Power-Down/Power-Up Timing—bq3285EC
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