HCC4543B

HCF4543B

December 1989

BCD-TO-7 SEGMENT LATCH/DECODER/LCD DRIVER

EY

(Plastic Package)

DISPLAY BLANKING OF ALL ILLEGAL INPUT

COMBINATIONS

LATCH STORAGE OF CODE

CAPABILITY OF DRIVING TWO LOW POWER

TTL LOADS, TWO HTL LOADS, OR ONE LOW

POWER SCHOTTKY LOAD OVER THE FULL

RATED-TEMPERATURE RANGE

PIN-FOR-PIN

REPLACEMENT

FOR

THE

DIRECT LED DRIVING CAPABILITY

100% TESTED FOR QUIESCENT CURRENT

AT 20V

MAXIMUM INPUT CURRENT OF 1A AT 18V

OVER

FULL

PACKAGE-TEMPERATURE

RANGE ; 100nA AT 18V AND 25

°C

NOISE MARGIN (full package-temperature

5-V, 10-V, AND 15-V PARAMETRIC RATINGS

ORDER CODES :

HCC4543 BF

HCF4543 BM1

HCF4543 BEY

HCF4543 BC1

F

(Ceramic Frit Seal Package)

M1

(Micro Package)

C1

(Plastic Chip Carrier)

Applications :

PIN CONNECTION (top view)

INSTRUMENT DISPLAY DRIVER

DASHBOARD DISPLAY DRIVER

COMPUTER/CALCULATOR DISPLAY DRIVER

TIMING DEVICE DRIVER (clocks, watches,

timers)

DESCRIPTION

The HCC/HCF4543B is a BCD-to-seven segment

latch/decoder/driver designed primarily for liquid-

crystal display (LCD) applications. It is also capable

of driving light emitting diode (LED), incandescent,

gas-discharge, and fluorescent displays. This de-

vice is functionally similar to and serves as direct re-

placement for the HCF4056B when pin 7 is

that it has a display blanking capability instead of a

level-shifting function and requires only one power

supply. When the HCF4056B is used in the level

shifting mode, two power supplies are required.

When the HCF4543B is used for LCD applications,

a square wave must be applied to the PHASE input

and the backplane of the LCD device. For LED ap-

plications a logic 1 is required at the PHASE input

for common-cathode devices ; a logic 0 is required

for common-anode devices (see truth table).

HCC/HCF4543B

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