參數(shù)資料
型號: CDP1878C
廠商: Intersil Corporation
元件分類: 通用總線功能
英文描述: CMOS Dual Counter-Timer(CMOS 雙路計時器/定時器)
中文描述: CMOS雙反定時器(的CMOS雙路計時器/定時器)
文件頁數(shù): 13/13頁
文件大?。?/td> 61K
代理商: CDP1878C
4-103
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C
Dynamic Electrical Specifications
at T
A
= -40 to +85
o
C, V
DD
= 5V
±
5%, Input t
R
, t
F
= 10ns, C
L
= 50pF and 1 TTL Load
PARAMETER
SYMBOL
(NOTE 1)
MIN
(NOTE 2)
TYP
MAX
UNITS
WRITE CYCLE TIMES (See Figure 15)
Address Setup to Write
t
AS
150
-
-
ns
Write Pulse Width
t
WR
150
-
-
ns
Data Setup to Write
t
DS
200
-
-
ns
Address Hold after Write
t
AH
50
-
-
ns
Data Hold after Write
t
WH
50
-
-
ns
Chip Select Setup to TPA
t
CS
50
-
-
ns
NOTES:
1. Time required by a limit device to allow for the indicated function.
2. Typical values are for T
A
= 25
o
C and nominal V
DD
.
FIGURE 15. WRITE CYCLE TIMING WAVEFORMS
ADDRESS/CHIP SELECT
WRITE
TPA
DATA TO COUNTER-TIMER
t
CS
t
AH
t
AS
t
DS
t
WR
t
WH
CDP1878C
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