74F401SCX データシートの表示（PDF） - Fairchild Semiconductor

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74F401SCX

CRC Generator/Checker

Fairchild Semiconductor 

April 1988

Revised August 1999

74F401

CRC Generator/Checker

General Description

The 74F401 Cycle Redundancy Check (CRC) Generator/

Checker provides an advanced tool for implementing the

most widely used error detection scheme in serial digital

data handling systems. A 3-bit control input selects one-of-

eight generator polynomials. The list of polynomials

includes CRC-16 and CRC-CCITT as well as their recipro-

cals (reverse polynomials). Automatic right justification is

incorporated for polynomials of degree less than 16. Sepa-

rate clear and preset inputs are provided for floppy disk

and other applications. The Error output indicates whether

or not a transmission error has occurred. Another control

input inhibits feedback during check word transmission.

The 74F401 is fully compatible with all TTL families.

Features

s Eight selectable polynomials

s Error indicator

s Separate preset and clear controls

s Automatic right justification

s Fully compatible with all TTL logic families

s 14-pin package

s 9401 equivalent

s Typical applications:

Floppy and other disk storage systems

Digital cassette and cartridge systems

Data communication systems

Ordering Code:

Order Number Package Number

Package Description

74F401SC

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

74F401PC

N14A

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

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

Logic Symbol

Connection Diagram

© 1999 Fairchild Semiconductor Corporation DS009534

www.fairchildsemi.com

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