參數(shù)資料
型號: BQ4285Q
廠商: TEXAS INSTRUMENTS INC
元件分類: XO, clock
英文描述: 1 TIMER(S), REAL TIME CLOCK, PQCC28
封裝: PLASTIC, LCC-28
文件頁數(shù): 7/26頁
文件大?。?/td> 1079K
代理商: BQ4285Q
15
Jan. 1999 D
Read/Write Timing (TA =TOPR,VCC = 5V ± 10%)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Notes
tCYC
Cycle time
160
-
ns
tDSL
DS low or RD/WR high time
80
-
ns
tDSH
DS high or RD/WR low time
55
-
ns
tRWH
R/W hold time
0
-
ns
tRWS
R/W setup time
10
-
ns
tCS
Chip select setup time
5
-
ns
tCH
Chip select hold time
0
-
ns
tDHR
Read data hold time
0
-
25
ns
tDHW
Write data hold time
0
-
ns
tAS
Address setup time
20
-
ns
tAH
Address hold time
5
-
ns
tDAS
Delay time, DS to AS rise
10
-
ns
tASW
Pulse width, AS high
30
-
ns
tASD
Delay time, AS to DS rise
(RD/WR fall)
35
--
ns
tOD
Output data delay time from
DS rise (RD fall)
-
50
ns
tDW
Write data setup time
30
-
ns
tBUC
Delay time before update
-
244
-
s
tPI
Periodic interrupt time interval
----
See Table 3
tUC
Time of update cycle
-
1
-
s
bq4285
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