54F402 NSC [National Semiconductor], 54F402 Datasheet

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54F402

Manufacturer Part Number
54F402
Description
Serial Data Polynomial Generator/Checker
Manufacturer
NSC [National Semiconductor]
Datasheet

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Part Number:
54F402DMQB/QS 5962-9059301MEA
Manufacturer:
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Quantity:
7
C 1995 National Semiconductor Corporation
54F 74F402 Serial Data Polynomial
Generator Checker
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
nomials (56
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
families
Note 1 Military grade device with environmental and burn-in processing Use suffix
Logic Symbol
TRI-STATE is a registered trademark of National Semiconductor Corporation
Ethernet is a registered trademark of Xerox Corporation
74F402PC
Commercial
th
order 48
as well as three other standard poly-
th
order 32
54F402DM (Note 1)
54F402FM (Note 1)
54F402LM (Note 1)
TL F 9535–4
TL F 9535
Military
devices and with all TTL
nd
order) Individual clear
for DIP SOIC and Flatpak
Pin Assignment
Package
Number
W16A
N16E
E20A
J16A
Features
Y
Y
Y
Y
Y
Y
Y
Y
Connection Diagrams
Guaranteed 30 MHz data rate
Six selectable polynomials
Other polynomials available
Separate preset and clear controls
Expandable
Automatic right justification
Error output open collector
Typical applications
Floppy and other disk storage systems
Digital cassette and cartridge systems
Data communication systems
e
DMQB FMQB and LMQB
TL F 9535 – 1
16-Lead (0 300 Wide) Molded Dual-In-Line
16-Lead Ceramic Dual-In-Line
16-Lead Cerpack
20-Lead Ceramic Leadless Chip Carrier Type C
Package Description
Pin Assignment
for LCC
RRD-B30M105 Printed in U S A
January 1995
TL F 9535 – 2

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54F402 Summary of contents

Page 1

... Commercial Military 74F402PC 54F402DM (Note 1) 54F402FM (Note 1) 54F402LM (Note 1) Note 1 Military grade device with environmental and burn-in processing Use suffix Logic Symbol TL F 9535–4 TRI-STATE is a registered trademark of National Semiconductor Corporation Ethernet is a registered trademark of Xerox Corporation C 1995 National Semiconductor Corporation ...

Page 2

Unit Loading Fan Out Pin Names Description S –S Polynomial Select Inputs 0 3 CWG Check Word Generate Input D CW Serial Data Check Word D Data Input ER Error Output RO Register Output CP Clock Pulse SEI Serial Expansion ...

Page 3

Select Code Hex ...

Page 4

Select Code Applications In addition to ...

Page 5

Applications (Continued 9535 – 6 ...

Page 6

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Storage Temperature b Ambient Temperature under Bias b Junction Temperature under Bias b Plastic b V Pin Potential ...

Page 7

AC Electrical Characteristics Symbol Parameter f Maximum Clock Frequency max t Propagation Delay PLH PHL t Propagation Delay PLH PHL t Propagation Delay PLH PHL t Propagation ...

Page 8

AC Operating Requirements Symbol Parameter t (H) Setup Time HIGH or LOW s t (L) SEI (H) Hold Time HIGH or LOW h t (L) SEI (H) Setup Time HIGH or LOW ...

Page 9

Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows Temperature Range Family 74F Commercial e 54F Military e Device Type Package Code P ...

Page 10

Physical Dimensions inches (millimeters) 20-Lead Ceramic Leadless Chip Carrier (L) 16-Lead Ceramic Dual-In-Line Package (D) NS Package Number E20A NS Package Number J16A 10 ...

Page 11

Physical Dimensions inches (millimeters) (Continued) 16-Lead (0 300 Wide) Molded Plastic Dual-In-Line Package (P) NS Package Number N16E 11 ...

Page 12

Physical Dimensions inches (millimeters) (Continued) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 ...

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