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

• Wide Operating Temperature Range . . . -55oC to 125oC

• Balanced Propagation Delay and Transition Times

• Significant Power Reduction Compared to LSTTL

Logic ICs

• HC Types

- 2V to 6V Operation

- High Noise Immunity: NIL = 30%, NIH = 30% of VCC

at VCC = 5V

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.)