Datasheet

January 1995 4
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver
HEF4543B
MSI
FUNCTION TABLE
Notes
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
4. For liquid crystal displays, apply a square-wave to PH.
For common cathode LED displays, select PH = LOW.
For common anode LED displays, select PH = HIGH.
5. Depends upon the BCD-code previously applied when LD = HIGH.
INPUTS OUTPUTS
LD BI PH
(4)
D
D
D
C
D
B
D
A
O
a
O
b
O
c
O
d
O
e
O
f
O
g
DISPLAY
X H L X X X X L L L L L L L blank
HLL L L L LHH HHHHL 0
HLLLLLHLHHLLLL 1
HLLLLHLHHLHHLH 2
HL L L L H H H H H H L L H 3
HLLLHLLLHHLLHH 4
HLLLHLHHLHHLHH 5
HLL LHH LH L HHHHH 6
HLLLHHHHHHLLLL 7
HLL HL L LHH HHHHH 8
HL L H L L H H H H H L HH 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
LL L X X X X
(5) (5)
as above H as above inverse of above as above
Fig.5 Display.