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參數(shù)資料
| 型號： | AC161M |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 4-BIT SYNCHRONOUS BINARY COUNTERS |
| 中文描述： | 4位同步二進(jìn)制計(jì)數(shù)器 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 393K |
| 代理商： | AC161M |
CD54AC161, CD74AC161
4-BIT SYNCHRONOUS BINARY COUNTERS
SCHS239C
–
SEPTEMBER 1998
–
REVISED MARCH 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
INPUTS
OUTPUTS
FUNCTION
CLR
CLK
ENP
ENT
LOAD
A,B,C,D
Qn
L
RCO
L
X
↑
↑
↑
X
X
X
X
X
X
L
Reset (clear)
H
X
X
l
l
L
L
Parallel load
H
X
X
l
h
H
Note 1
H
h
h
h
X
Count
Note 1
Count
H
H
l
X
l
h
h
X
X
qn
qn
Note 1
L
Inhibit
X
H = high level, L = low level, X = don
’
t care, h = high level one setup time prior to the CLK
low-to-high transition, l = low level one setup time prior to the CLK low-to-high transition, q = the
state of the referenced output prior to the CLK low-to-high transition, and
↑
= CLK low-to-high
transition.
NOTE 1: The RCO output is high when ENT is high and the counter is at terminal count
(HHHH).
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