October 1987

Revised January 1999

© 1999 Fairchild Semiconductor Corporation

DS005959.prf

www.fairchildsemi.com

CD4028BC

BCD-to-Decimal Decoder

General Description

The CD4028BC is a BCD-to-decimal or binary-to-octal

decoder consisting of 4 inputs, decoding logic gates, and

10 output buffers. A BCD code applied to the 4 inputs, A, B,

C, and D, results in a high level at the selected 1-of-10 dec-

imal decoded outputs. Similarly, a 3-bit binary code applied

to inputs A, B, and C is decoded in octal at outputs 0–7. A

high level signal at the D input inhibits octal decoding and

causes outputs 0–7 to go LOW.

All inputs are protected against static discharge damage by

Features

s Wide supply voltage range:

3.0V to 15V

s Low power TTL compatibility: fan out of 2 driving 74L

or 1 driving 74LS

s Low power

s Glitch free outputs

s “Positive logic” on inputs and outputs

Applications

• Code conversion

• Address decoding

• Indicator-tube decoder

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Pin Assignments for DIP and SOIC

Top View

Order Number

Package Number

Package Description

CD4028BCM

M16A

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body

CD4028BCN

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide