7447 IC BCD to 7-Segment Decoders/Drivers Common Anode DIP-16

Description

IC BCD to 7-Segment Decoders/Drivers Common Anode

Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions. All of the circuits incorporate automatic leading and/or trailing-edge, zero-blanking control (RBI and RBO). Lamp test (LT) of these devices may be performed at any time when the BI/RBO node is at a high logic level. All types contain an overriding blanking input (BI) which can be used to control the lamp intensity (by pulsing) or to inhibit the outputs.

Features

All circuit types feature lamp intensity modulation capability

Open-collector outputs drive indicators directly

Lamp-test provision

Leading/trailing zero suppression

Pinout:

Pin Configuration:

Here’s a typical pinout for the
7447
IC (assuming it’s in a 16-pin DIP package):

Pin Number

Pin Name

Description

1

a

Segment ‘a’ output (controls segment a)

2

b

Segment ‘b’ output (controls segment b)

3

c

Segment ‘c’ output (controls segment c)

4

d

Segment ‘d’ output (controls segment d)

5

e

Segment ‘e’ output (controls segment e)

6

f

Segment ‘f’ output (controls segment f)

7

g

Segment ‘g’ output (controls segment g)

8

Vss

Ground

9

BL

Blanking input (active low)

10

D

BCD input (D)

11

C

BCD input (C)

12

B

BCD input (B)

13

A

BCD input (A)

14

Vcc

Positive voltage supply (typically +5V)

15

LE

Lamp test input (active low)

16

LT

Lamp test input (active low)

Technical Specifications

Physical

Case/Package

PDIP

Number of Pins

16

Technical

High-Level Output Current

-200 µA

Independent Circuits

1

Logic Function

Decoder

Low-Level Output Current

8 mA

Max Input Voltage

5.25 V

Max Operating Temperature

70 °C

Min Input Voltage

4.75 V

Min Operating Temperature

0 °C

Operating Supply Voltage

5.25 V

Supply Type

Single

How To Use This Chip

Like every other chip in the 7400 series, this IC needs to be connected to power before you can use it. Most 7400 ICs support a VCC voltage of 5V. One difference between the HC and LS versions of the chip is that the 74HC47 supports 2V to 6V, while the 74LS47 supports only 5V.

7447 Datasheet