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74F402PC Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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74F402PC Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page © 1999 Fairchild Semiconductor Corporation DS009535 www.fairchildsemi.com April 1988 Revised August 1999 74F402 Serial Data Polynomial Generator/Checker General Description The 74F402 expandable Serial Data Polynomial generator/ checker is an expandable version of the 74F401. It pro- vides an advanced tool for the implementation of the most widely used error detection scheme in serial digital han- dling systems. A 4-bit control input selects one-of-six gen- erator polynomials. The list of polynomials includes CRC- 16, CRC-CCITT and Ethernet ®, as well as three other standard polynomials (56th order, 48th order, 32nd order). Individual clear and preset inputs are provided for floppy disk and other applications. The Error output indicates whether or not a transmission error has occurred. The CWG Control input inhibits feedback during check word transmission. The 74F402 is compatible with FAST ® devices and with all TTL families. Features s Guaranteed 30 MHz data rate s Six selectable polynomials s Other polynomials available s Separate preset and clear controls s Expandable s Automatic right justification s Error output open collector s Typical applications: Floppy and other disk storage sys- tems Digital cassette and cartridge systems Data com- munication systems Ordering Code: Logic Symbol Connection Diagram FAST ® is a registered trademark of Fairchild Semiconductor Corporation. Ethernet ® is a registered trademark of Xerox Corporation. Order Number Package Number Package Description 74F402PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide |
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