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54F402LM Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # 54F402LM
Description  Serial Data Polynomial Generator/Checker
Download  12 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

54F402LM Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLF9535
January 1995
54F74F402 Serial Data Polynomial
GeneratorChecker
General Description
The ’F402 expandable Serial Data Polynomial generator
checker is an expandable version of the ’F401 It provides
an advanced tool for the implementation of the most widely
used error detection scheme in serial digital handling sys-
tems A 4-bit control input selects one-of-six generator poly-
nomials The list of polynomials includes CRC-16 CRC-
CCITT and Ethernet
as well as three other standard poly-
nomials (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
’F402 is compatible with FAST
devices and with all TTL
families
Features
Y
Guaranteed 30 MHz data rate
Y
Six selectable polynomials
Y
Other polynomials available
Y
Separate preset and clear controls
Y
Expandable
Y
Automatic right justification
Y
Error output open collector
Y
Typical applications
Floppy and other disk storage systems
Digital cassette and cartridge systems
Data communication systems
Commercial
Military
Package
Package Description
Number
74F402PC
N16E
16-Lead (0300 Wide) Molded Dual-In-Line
54F402DM (Note 1)
J16A
16-Lead Ceramic Dual-In-Line
54F402FM (Note 1)
W16A
16-Lead Cerpack
54F402LM (Note 1)
E20A
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1
Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbol
Connection Diagrams
TLF9535 – 4
Pin Assignment
for DIP SOIC and Flatpak
TLF9535 – 1
Pin Assignment
for LCC
TLF9535 – 2
TRI-STATE
is a registered trademark of National Semiconductor Corporation
Ethernet
is a registered trademark of Xerox Corporation
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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