Philips HEF4543BT, HEF4543BPB, HEF4543BP, HEF4543BDB, HEF4543BD Datasheet
DATA SH EET
Product specification
File under Integrated Circuits, IC04
January 1995
INTEGRATED CIRCUITS
HEF4543B
MSI
BCD to 7-segment
latch/decoder/driver
For a complete data sheet, please also download:
•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
January 1995 2
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver
HEF4543B
MSI
DESCRIPTION
The HEF4543B is a BCD to 7-segment
latch/decoder/driver for liquid crystal and LED displays. It
has four address inputs (DAto DD), an active HIGH latch
disable input (LD), an active HIGH blanking input (BI), an
active HIGH phase input (PH) and seven buffered
segment outputs (Oato Og).
The circuit provides the function of a 4-bit storage latch
and an 8-4-2-1 BCD to 7-segment decoder/driver. It can
invert the logic levels of the output combination. The phase
(PH), blanking (BI) and latch disable (LD) inputs are used
to reverse the function table phase, blank the display and
store a BCD code, respectively.
For liquid crystal displays a square-wave is applied to PH
and the electrical common back-plane of the display. The
outputs of the device are directly connected to the
segments of the liquid crystal.
Fig.1 Functional diagram.
HEF4543BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4543BD(F): 16-lead DIL; ceramic (cerdip) ( SOT74)
HEF4543BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America
Fig.2 Pinning diagram.
PINNING
D
A
to D
D
address (data) inputs
PH phase input (active HIGH)
BI blanking input (active HIGH)
LD latch disable input (active HIGH)
O
a
to O
g
segment outputs
FAMILY DATA, I
DD
LIMITS category MSI
See Family Specifications
Fig.3 Segment designation.
January 1995 3
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver
HEF4543B
MSI
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Fig.4 Logic diagram.
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