HCF4543 STMicroelectronics, HCF4543 Datasheet - Page 3

• Manufacturer Part Number: HCF4543
• Description: BCD-TO-7 SEGMENT LATCH/DECODER/LCD DRIVER
• Manufacturer: STMicroelectronics

X = Don’t care.
* = For liquid-crystal readouts, apply a square wave to Ph.
** = Depends upon the BCD code previously applied when LD = 1.
TRUTH TABLE
LD
= Above combinations
X
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
For common cathode LED readouts, select Ph = 0.
For common anode LED readouts, select Ph = 1.
BI
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Ph*
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
INPUT CODE
D
X
X
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
C
X
X
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
B
X
X
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
X
a
0
1
0
1
1
0
1
1
1
1
1
0
0
0
0
0
0
b
0
1
1
1
1
1
0
0
1
1
1
0
0
0
0
0
0
OUTPUT STATE
Inverse of Output
c
0
1
1
0
1
1
1
1
1
1
1
0
0
0
0
0
0
Combinations
Above
**
d
0
1
0
1
1
0
1
1
0
1
1
0
0
0
0
0
0
e
0
1
0
1
0
0
0
1
0
1
0
0
0
0
0
0
0
0
1
0
0
0
1
1
1
0
1
1
0
0
0
0
0
0
f
g
0
0
0
1
1
1
1
1
0
1
1
0
0
0
0
0
0
HCC/HCF4543B
CHARACTER
DISPLAY
as above
Display
Blank
Blank
Blank
Blank
Blank
Blank
**
0
1
2
3
4
5
6
7
8
9
3/12