7-1442

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

1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999

CD40257BMS

CMOS Quad 2 Line to 1 Line

Data Selector/Multiplexer

Features

• High Voltage Type (20V Rating)

• 3-State Outputs

• 100% Tested for Quiescent Current at 20V

• 5V, 10V and 15V Parametric Ratings

• Maximum Input Current of 1

µA at 18V Over Full Pack-

• Noise Margin (Over Full Package/Temperature Range)

- 1V at VDD = 5V

- 2V at VDD = 10V

- 2.5V at VDD = 15V

• Standardized Symmetrical Output Characteristics

• Meets All Requirements of JEDEC Tentative Standard

No. 13B, “Standard Specifications for Description of

‘B’ Series CMOS Devices”

Applications

• Digital Multiplexing

• Shift Right/Shift Left Registers

• True/Complement Selection

Description

CD40257BMS is a data selector/multiplexer featuring three

state outputs which can interface directly with and drive data

lines of bus oriented systems.

The CD40257BMS is supplied in these 16-lead outline

packages:

Braze Seal DIP

H4T

Frit Seal DIP

H1E

Ceramic Flatpack

H3X

December 1992

File Number

3364

Pinout

CD40257BMS

TOP VIEW

Functional Diagram

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

INPUT SELECT

A1

B1

D1

A2

B2

VSS

D2

VDD

A4

B4

D4

A3

B3

D3

OUTPUT DISABLE

2

3

5

6

11

10

14

13

A1

B1

A2

B2

A4

B4

A3

B3

1

4

7

9

12

D1

D2

D3

D4

OUTPUT

15

VDD = 16

VSS = 8

DISABLE

INPUT

SELECT