hef4543b NXP Semiconductors, hef4543b Datasheet - Page 2

• Manufacturer Part Number: hef4543b
• Description: Bcd To 7-segment Latch/decoder/driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF4543B is a BCD to 7-segment
latch/decoder/driver for liquid crystal and LED displays. It
has four address inputs (D
disable input (LD), an active HIGH blanking input (BI), an
active HIGH phase input (PH) and seven buffered
segment outputs (O
PINNING
January 1995
D
PH
BI
LD
O
A
BCD to 7-segment latch/decoder/driver
a
to O
to D
D
g
Fig.1 Functional diagram.
address (data) inputs
phase input (active HIGH)
blanking input (active HIGH)
latch disable input (active HIGH)
segment outputs
a
to O
g
A
).
to D
D
), an active HIGH latch
2
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.
FAMILY DATA, I
See Family Specifications
HEF4543BP(N):
HEF4543BD(F):
HEF4543BT(D):
( ): Package Designator North America
Fig.3 Segment designation.
DD
Fig.2 Pinning diagram.
LIMITS category MSI
16-lead DIL; plastic (SOT38-1)
16-lead DIL; ceramic (cerdip) ( SOT74)
16-lead SO; plastic (SOT109-1)
Product specification
HEF4543B
MSI