參數(shù)資料
型號(hào): 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(jì)時(shí)器/定時(shí)器)
中文描述: CMOS雙反定時(shí)器(的CMOS雙路計(jì)時(shí)器/定時(shí)器)
文件頁數(shù): 12/13頁
文件大小: 61K
代理商: CDP1878C
4-102
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
READ CYCLE TIMES (See Figure 14)
Data Access from Address
t
DA
-
350
-
ns
Read Pulse Width
t
RD
400
-
-
ns
Data Access from Read
t
DR
-
250
-
ns
Address Hold after Read
t
RH
0
-
-
ns
Output Hold after Read
t
DH
50
-
-
ns
Chip Select Setup to TPA
t
CS
50
-
-
ns
NOTES:
1. Time required be a limit device to allow for the indicated function.
2. Typical values are for T
A
= 25
o
C and nominal V
DD
.
FIGURE 14. READ CYCLE TIMING WAVEFORMS
ADDRESS/CHIP SELECT
READ
TPA
DATA TO CPU
t
CS
t
RH
t
RD
t
DR
t
DA
t
DH
CDP1878C
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