Datasheet

CD74HCT4543
BCD-TO-7 SEGMENT LATCH/DECODER/DRIVER
SCHS281A – REVISED MAY 2003
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
LD BI PH D
3
D
2
D
1
D
0
a b c d e f g Display
X H L X X X X L L L L L L L Blank
H L L L L L L H H H H H H L 0
H L L L L L H L H H L L L L 1
H L L L L H L H H L H H L H 2
H L L L L H H H H H H L L H 3
H L L L H L L L H H L L H H 4
H L L L H L H H L H H L H H 5
H L L L H H L H L H H H H H 6
H L L L H H H H H H L L L L 7
H L L H L L L H H H H H H H 8
H L L H L L H H H L H L H H 9
H L L H L H L L L L L L L L Blank
H L L H L H H L L L L L L L Blank
H L L H H L L L L L L L L L Blank
H L L H H L H L L L L L L L Blank
H L L H H H L L L L L L L L Blank
H L L H H H H L L L L L L L Blank
L L L X X X X
† †
As above H As above Inverse of above As above
†
Depends on BCD code previously applied when LD = high.
functional diagram
5
3
2
4
1
7
D0
D1
D2
D3
LD
BI
PH
6
GND = 8
V
CC
= 16
9
10
11
12
13
15
14
a
b
c
d
e
f
g
Latch
Decoder
Driver
7-Segment
Outputs
BCD
Inputs