National Semiconductor DM54LS260, DM74LS260 Technical data

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DM54LS260/DM74LS260
Dual 5-Input NOR Gate

General Description

This device contains two individual five input gates, each of
which perform the logic NOR function.

Connection Diagram

DM54LS260/DM74LS260 Dual 5-Input NOR Gate

April 1992

Dual-In-Line Package

Truth Table

Order Number DM54LS260J, DM54LS260W,

TL/F/9824– 1

DN54LS260E, DM74LS260M or DM74LS260N

See NS Package Number E20A, J14A, M14A, N14A or W14B

AaBaCaDaEeY

Inputs Outputs

ABCDE Y

LLLLL H
XXXXH L
XXXHX L
XXHXX L
XHXXX L
HXXX X L

C

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

TL/F/9824

Absolute Maximum Ratings (Note)

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

Supply Voltage 7V

Input Voltage 7V

Operating Free Air Temperature Range

DM54LS
DM74LS 0

Storage Temperature Range

b

55§Ctoa125§C

Ctoa70§C

§

b

65§Ctoa150§C

The ‘‘Absolute Maximum Ratings’’ are those values

Note:

beyond which the safety of the device cannot be guaran­teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.

Recommended Operating Conditions

Symbol Parameter

V

CC

V

IH

V

IL

I

OH

I

OL

T

A

Supply Voltage 4.5 5 5.5 4.75 5 5.25 V

High Level Input Voltage 2 2 V

Low Level Input Voltage 0.7 0.8 V

High Level Output Current

Low Level Output Current 4 8 mA

Free Air Operating Temperature

DM54LS260 DM74LS260

Min Nom Max Min Nom Max

b

0.4

b

55 125 0 70

b

0.4 mA

Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)

Symbol Parameter Conditions Min

e

V

I

V

OH

V

OL

I

I

I

IH

I

IL

Input Clamp Voltage V

High Level Output V
Voltage V

Low Level Output V
Voltage V

Input Current@Max V
Input Voltage V

High Level Input Current V

Low Level Input Current V

CC

CC

e

IL

CC

e

IH

e

I

OL

CC

CC

CC

Min, I

e

Min, I

Max

e

Min, I

Min

4 mA, V

e

Max, V

e

Max, V

e

Max, V

eb

18 mA

I

e

Max DM54 2.5

OH

DM74 2.7

e

Max DM54 0.4

OL

DM74 0.5 V

e

Min DM74 0.4

CC

e

7V

I

e

10V DM54

I

e

2.7V 20 mA

I

e

0.4V DM54

I

DM74

I

OS

I

CCH

I

CCL

Note 1: All typicals are at V

Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.

Short Circuit V
Output Current (Note 2)

Supply Current with Outputs High V

Supply Current with Outputs Low V

e

e

5V, T

CC

25§C.

A

e

Max DM54

CC

CC

CC

e

e

Max, V

Max, V

e

GND 4.0 mA

IN

e

Open 5.5 mA

IN

DM74

b

b

Typ

(Note 1)

Max Units

b

1.5 V

0.1 mA

b

0.40

b

0.36

20

20

b

100

b

100

Units

C

§

mA

mA

V

Switching Characteristics V

Symbol Parameter

t

t

PLH

PHL

Propagation Delay Time
Low to High Level Output

Propagation Delay Time
High to Low Level Output

CC

ea

5V, T

A

ea

2

25§C

e

2kX,C

R

L

Min Max

e

15 pF

L

10 ns

12 ns

Units