NSC 54F280LMQB, 54F280FMQB, 54F280DMQB, 54F280DM, 54F280DC Datasheet

TL/F/9512

54F/74F280 9-Bit Parity Generator/Checker

August 1995

54F/74F280
9-Bit Parity Generator/Checker

General Description

The ’F280 is a high-speed parity generator/checker that ac­cepts nine bits of input data and detects whether an even or
an odd number of these inputs is HIGH. If an even number
of inputs is HIGH, the Sum Even output is HIGH. If an odd
number is HIGH, the Sum Even output is LOW. The Sum
Odd output is the complement of the Sum Even output.

Features

Y

Guaranteed 4000V minimum ESD protection

Commercial Military

Package

Package Description

Number

74F280PC N14A 14-Lead (0.300×Wide) Molded Dual-In-Line

54F280DM (Note 2) J14A 14-Lead Ceramic Dual-In-Line

74F280SC (Note 1) M14A 14-Lead (0.150×Wide) Molded Small Outline, JEDEC

74F280SJ (Note 1) M14D 14-Lead (0.300×Wide) Molded Small Outline, EIAJ

54F280FM (Note 2) W14B 14-Lead Cerpack

54F280LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C

Note 1: Devices also available in 13×reel. Use suffixeSCX and SJX.

Note 2: Military grade device with environmental and burn-in processing. Use suffix

e

DMQB, FMQB and LMQB.

Logic Symbols Connection Diagrams

TL/F/9512– 3

IEEE/IEC

TL/F/9512– 5

Pin Assignment for

DIP, SOIC and Flatpak

TL/F/9512– 1

Pin Assignment

for LCC

TL/F/9512– 2

TRI-STATEÉis a registered trademark of National Semiconductor Corporation.

C

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

Unit Loading/Fan Out

54F/74F

Pin Names Description

U.L. Input I

IH/IIL

HIGH/LOW Output IOH/I

OL

I0–I

8

Data Inputs 1.0/1.0 20 mA/b0.6 mA

R

O

Odd Parity Output 50/33.3

b

1 mA/20 mA

R

E

Even Parity Output 50/33.3

b

1 mA/20 mA

Truth Table

Number of Outputs

HIGH Inputs

R Even R Odd

I

0–I8

0, 2, 4, 6, 8 H L
1, 3, 5, 7, 9 L H

HeHIGH Voltage Level
L

e

LOW Voltage Level

Logic Diagram

TL/F/9512– 4

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

2

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Storage Temperature

b

65§Ctoa150§C

Ambient Temperature under Bias

b

55§Ctoa125§C

Junction Temperature under Bias

b

55§Ctoa175§C

Plastic

b

55§Ctoa150§C

V

CC

Pin Potential to

Ground Pin

b

0.5V toa7.0V

Input Voltage (Note 2)

b

0.5V toa7.0V

Input Current (Note 2)

b

30 mA toa5.0 mA

Voltage Applied to Output

in HIGH State (with V

CC

e

0V)

Standard Output

b

0.5V to V

CC

TRI-STATEÉOutput

b

0.5V toa5.5V

Current Applied to Output

in LOW State (Max) twice the rated I

OL

(mA)

ESD Last Passing Voltage (Min) 4000V

Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under
these conditions is not implied.

Note 2: Either voltage limit or current limit is sufficient to protect inputs.

Recommended Operating
Conditions

Free Air Ambient Temperature

Military

b

55§Ctoa125§C

Commercial 0

§

Ctoa70§C

Supply Voltage

Military

a

4.5V toa5.5V

Commercial

a

4.5V toa5.5V

DC Electrical Characteristics

Symbol Parameter

54F/74F

Units V

CC

Conditions

Min Typ Max

V

IH

Input HIGH Voltage 2.0 V Recognized as a HIGH Signal

V

IL

Input LOW Voltage 0.8 V Recognized as a LOW Signal

V

CD

Input Clamp Diode Voltage

b

1.2 V Min I

IN

eb

18 mA

V

OH

Output HIGH 54F 10% V

CC

2.5 I

OH

eb

1mA

Voltage 74F 10% V

CC

2.5 V Min I

OH

eb

1mA

74F 5% V

CC

2.7 I

OH

eb

1mA

V

OL

Output LOW 54F 10% V

CC

0.5
V Min

I

OL

e

20 mA

Voltage 74F 10% V

CC

0.5 I

OL

e

20 mA

I

IH

Input HIGH Current 54F 20.0

mA Max

V

IN

e

2.7V

74F 5.0

I

BVI

Input HIGH Current 54F 100

mA Max

V

IN

e

7.0V

Breakdown Test 74F 7.0

I

CEX

Output HIGH 54F 250

mA Max

V

OUT

e

V

CC

Leakage Current 74F 50

V

ID

Input Leakage Test

74F 4.75 V 0.0

I

ID

e

1.9 mA

All Other Pins Grounded

I

OD

Output Leakage

74F 3.75 mA 0.0

V

IOD

e

150 mV

Circuit Current All Other Pins Grounded

I

IL

Input LOW Current

b

0.6 mA Max V

IN

e

0.5V

I

OS

Output Short-Circuit Current

b

60

b

150 mA Max V

OUT

e

0V

I

CCH

Power Supply Current 25 38 mA Max V

O

e

HIGH

3