HCC4527B Datasheet, PDF (4/13 Pages) STMicroelectronics – BCD RATE MULTIPLEXER

HCC/HCF4527B
TRUTH TABLE
Inputs
Number of Pulsed or Logic Level
(0 = Low; 1 = High; X = Don’t Care)
D C B A CLK INH IN STR CAS CLR SET
0 0 0 0 10
0
0
0
0
0
0 0 0 1 10
0
0
0
0
0
0 0 1 0 10
0
0
0
0
0
0 0 1 1 10
0
0
0
0
0
0 1 0 0 10
0
0
0
0
0
0 1 0 1 10
0
0
0
0
0
0 1 1 0 10
0
0
0
0
0
0 1 1 1 10
0
0
0
0
0
1 0 0 0 10
0
0
0
0
0
1 0 0 1 10
0
0
0
0
0
1 0 1 0 10
0
0
0
0
0
1 0 1 1 10
0
0
0
0
0
1 1 0 0 10
0
0
0
0
0
1 1 0 1 10
0
0
0
0
0
1 1 1 0 10
0
0
0
0
0
1 1 1 1 10
0
0
0
0
0
X X X X 10
1
0
0
0
0
X X X X 10
0
1
0
0
0
X X X X 10
0
0
1
0
0
1 X X X 10
0
0
0
1
0
0 X X X 10
0
0
0
1
0
X X X X 10
0
0
0
0
1
q Output same as the first 16 lines of this truth table (depending on value of A, B, C, D)
s Depends on internal state of counter.
Outputs
Number of Pulses or Output
Logic Level
(L = LOW; H = High)
OUT
OUT
INH
OUT
”9”
OUT
L
H
1
1
1
1
1
1
2
2
1
1
3
3
1
1
4
4
1
1
5
5
1
1
6
6
1
1
7
7
1
1
8
8
1
1
9
9
1
1
8
8
1
1
9
9
1
1
8
8
1
1
9
9
1
1
8
8
1
1
9
9
1
1
s
s
H
s
L
H
1
1
H
q
1
1
10
10
H
L
L
H
H
L
L
H
L
H
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