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CD54AC161 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. CD54AC161
Description  4-BIT SYNCHRONOUS BINARY COUNTERS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD54AC161 Datasheet(HTML) 2 Page - Texas Instruments

 
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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
RCO
FUNCTION
L
X
X
X
X
X
L
L
Reset (clear)
H
X
X
l
l
L
L
Parallel load
H
XX
l
h
H
Note 1
Parallel load
H
h
h
h
X
Count
Note 1
Count
H
X
l
X
h
X
qn
Note 1
Inhibit
H
X
X
l
h
X
qn
L
Inhibit
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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