1

Data sheet acquired from Harris Semiconductor

SCHS217B

Features

• Input Latches for BCD Code Storage

• Blanking Capability

• Phase Input for Complementing Outputs

• Fanout (Over Temperature Range)

- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads

- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

Description

The CD74HC4543 high-speed silicon-gate device is a BCD

to 7-segment latch/decoder/driver designed primarily for

directly driving liquid-crystal displays. It has an active-high

disable input (LD), an active-high blanking input (BI) and a

phase input (PH) to which a square wave is applied for

liquid-crystal applications. This square wave also is applied

to the backplane of the liquid-crystal display.

This device also can be used, in conjunction with current

amplifying

devices,

for

driving

LEDs,

incandescent,

fluorescent,

and

gas-discharge

displays.

For

these

applications the phase input provides a means to obtain

active-high or active-low segment outputs. (See the Function

Table.)

Pinout

CD74HC4543

(PDIP)

TOP VIEW

Ordering Information

PART NUMBER

TEMP. RANGE

PACKAGE

CD74HC4543E

-55 to 125

16 Ld PDIP

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

LD

D2

D1

D3

D0

PH

GND

BI

g

e

d

c

b

a

f

7-SEGMENT

OUTPUTS

BCD

INPUTS

February 1998 - Revised July 2003

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

Copyright

CD74HC4543

High-Speed CMOS Logic BCD to 7-Segment

Latch/Decoder/Driver for LCDs

[ /Title

(CD74

HC454

3)

/Sub-

ject

(High-

Speed

CMOS

Logic

BCD-

to-7