HCF4527B_02 Datasheet, PDF (3/12 Pages) STMicroelectronics – BCD RATE MULTIPLEXER

HCF4527B
TRUTH TABLE
INPUTS
Number of Pulses or Logic Level
D C B A CLK INH IN STR CAS CLR SET
LLLL
10
L
L
L
L
L
L L LH
10
L
L
L
L
L
L LHL
10
L
L
L
L
L
L LHH
10
L
L
L
L
L
LHL L
10
L
L
L
L
L
LHLH
10
L
L
L
L
L
L HH L
10
L
L
L
L
L
L HHH
10
L
L
L
L
L
HL L L
10
L
L
L
L
L
HL LH
10
L
L
L
L
L
HLHL
10
L
L
L
L
L
H L HH
10
L
L
L
L
L
HHL L
10
L
L
L
L
L
HH L H
10
L
L
L
L
L
HHH L
10
L
L
L
L
L
HHHH
10
H
L
L
L
L
XXXX
10
L
H
L
L
L
XXXX
10
L
L
L
L
L
XXXX
10
L
L
H
L
L
HXXX
10
L
L
L
H
L
LXXX
10
L
L
L
H
L
XXXX
10
L
L
L
L
H
X : Don’t Care
** : Depends on internal state of counter.
* : Output same as the first 16 lines of this truth table (depending on value of A, B, C, D)
OUTPUTS
Number of Pulses or Output
Logic Level
OUT
L
1
2
3
4
5
6
7
8
9
8
9
8
9
8
9
**
L
H
10
L
L
OUT
H
1
2
3
4
5
6
7
8
9
8
9
8
9
8
9
**
H
*
10
H
H
INH
OUT
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
H
1
1
H
H
L
"9"
OUT
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
**
1
1
L
L
H
3/12