Rev.3.00, Jul.22.2005, page 1 of 6

HD74LS48

BCD-to-Seven-Segment Decoder / Driver (Internal Pull-up outputs)

REJ03D0411–0300

Rev.3.00

Jul.22.2005

HD74LS48 features active high outputs for driving lamp buffers. This circuit has full ripple blanking input / output

controls and a lamp test input. Display patterns for BCD input counts above 9 are unique symbols to authenticate input

conditions. This circuit incorporates automatic leading and / or trailing-edge zero-blanking control (RBI and RBO).

Lamp test (LT) of these types may be performed at any time when the BI / RBO node is at a high level. It contains an

overriding blanking input (BI) which can be used to control the lamp intensity be pulsing or to inhibit the outputs.

Inputs and outputs are entirely compatible for use with TTL or DTL logic outputs.

Features

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74LS48P

DILP-16 pin

PRDP0016AE-B

(DP-16FV)

P

—

Pin Arrangement

(Top view)

GND

B

C

Lamp

Test

BI/RBO

RBI

D

A

f

g

b

a

c

d

e

15

16

1

2

3

4

5

6

7

14

8

9

10

11

12

13

Outputs

Inputs

Inputs

B

C

D

A

RBI

BI/RBO

LT

f

g

d

e

c

b

a