Datasheet DM54LS368AJ-MLS Datasheet (NSC)

TL/F/6430

54LS368A/DM54LS368A/DM74LS368A Hex TRI-STATE Inverting Buffers

May 1989

54LS368A/DM54LS368A/DM74LS368A
Hex TRI-STATE

É

Inverting Buffers

General Description

This device contains six independent gates each of which
performs an inverting buffer function. The outputs have the
TRI-STATE feature. When enabled, the outputs exhibit the
low impedance characteristics of a standard LS output with
additional drive capability to permit the driving of bus lines
without external resistors. When disabled, both the output
transistors are turned off presenting a high-impedance state
to the bus line. Thus the output will act neither as a signifi­cant load nor as a driver. To minimize the possibility that two

outputs will attempt to take a common bus to opposite logic
levels, the disable time is shorter than the enable time of the
outputs.

Features

Y

Alternate Military/Aerospace device (54LS368) is avail­able. Contact a National Semiconductor Sales Office/
Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6430– 1

Order Number 54LS368ADMQB, 54LS368AFMQB, 54LS368ALMQB,

DM54LS368AJ, DM54LS368AW, DM74LS368AM or DM74LS368AN

See NS Package Number E20A, J16A, M16A, N16E or W16A

Function Table

YeA

Inputs Output

AG Y

LL H
HL L
X H Hi-Z

HeHigh Logic Level

L

e

Low Logic Level

X

e

Either Low or High Logic Level

Hi-Z

e

TRI-STATE (Outputs are disabled)

TRI-STATEÉis a registered trademark of National Semiconductor Corporation.

C

1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

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 and 54LS

b

55§Ctoa125§C

DM74LS 0

§

Ctoa70§C

Storage Temperature Range

b

65§Ctoa150§C

Note:

The ‘‘Absolute Maximum Ratings’’ are those values
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

DM54LS368A DM74LS368A

Units

Min Nom Max Min Nom Max

V

CC

Supply Voltage 4.5 5 5.5 4.75 5 5.25 V

V

IH

High Level Input Voltage 2 2 V

V

IL

Low Level Input Voltage 0.7 0.8 V

I

OH

High Level Output Current

b

1

b

2.6 mA

I

OL

Low Level Output Current 12 24 mA

T

A

Free Air Operating Temperature

b

55 125 0 70

§

C

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

Symbol Parameter Conditions Min

Typ

Max Units

(Note 1)

V

I

Input Clamp Voltage V

CC

e

Min, I

I

eb

18 mA

b

1.5 V

V

OH

High Level Output V

CC

e

Min, I

OH

e

Max

2.4 3.4 V

Voltage V

IL

e

Max, V

IH

e

Min

V

OL

Low Level Output V

CC

e

Min, I

OL

e

Max DM54 0.25 0.4

Voltage V

IL

e

Max, V

IH

e

Min

DM74 0.35 0.5 V

I

OL

e

12 mA, V

CC

e

Min DM74 0.25 0.4

I

I

Input Current@Max V

CC

e

Max, V

I

e

7V

0.1 mA

Input Voltage

I

IH

High Level Input V

CC

e

Max, V

I

e

2.7V
20 mA

Current

I

IL

Low Level Input V

CC

e

Max, V

I

e

0.5V A Input

b

20 mA

Current (Note 4)

V

CC

e

Max, V

I

e

0.4V A Input

b

0.4

(Note 5) mA

V

CC

e

Max, V

I

e

0.4V G Input

b

0.4

I

OZH

Off-State Output Current V

CC

e

Max, V

O

e

2.4V

with High Level Output V

IH

e

Min, V

IL

e

Max 20 mA

Voltage Applied

I

OZL

Off-State Output Current V

CC

e

Max, V

O

e

0.4V

with Low Level Output V

IH

e

Min, V

IL

e

Max

b

20 mA

Voltage Applied

I

OS

Short Circuit V

CC

e

Max DM54

b

20

b

100

mA

Output Current (Note 2)

DM74

b

20

b

100

I

CC

Supply Current V

CC

e

Max (Note 3) 12 21 mA

Note 1: All typicals are at V

CC

e

5V, T

A

e

25§C.

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

Note 3: I

CC

is measured with the DATA inputs grounded and the OUTPUT CONTROLS at 4.5V.

Note 4: Both G

inputs are at 2V.

Note 5: Both G

inputs at 0.4V.

2

Switching Characteristics at V

CC

e

5V and T

A

e

25§C (See Section 1 for Test Waveforms and Output Load)

R

L

e

667X

Symbol Parameter C

L

e

50 pF C

L

e

150 pF Units

Min Max Min Max

t

PLH

Propagation Delay Time Low

15 25 ns

to High Level Output

t

PHL

Propagation Delay Time High

18 25 ns

to Low Level Output

t

PZH

Output Enable Time to

30 35 ns

High Level Output

t

PZL

Output Enable Time to

30 40 ns

Low Level Output

t

PHZ

Output Disable Time from

20 ns

High Level Output (Note 6)

t

PLZ

Output Disable Time from

20 ns

Low Level Output (Note 6)

Note 6: C

L

e

5 pF.

3

Physical Dimensions inches (millimeters)

Ceramic Leadless Chip Carrier Package (E)

Order Number 54LS368ALMQB

NS Package Number E20A

16-Lead Ceramic Dual-In-Line Package (J)

Order Number 54LS368ADMQB or DM54LS368AJ

NS Package Number J16A

4

Physical Dimensions inches (millimeters) (Continued)

16-Lead Small Outline Molded Package (M)

Order Number DM74LS368AM

NS Package Number M16A

16-Lead Molded Dual-In-Line Package (N)

Order Number DM74LS368AN

NS Package Number N16E

5

54LS368A/DM54LS368A/DM74LS368A Hex TRI-STATE Inverting Buffers

Physical Dimensions inches (millimeters) (Continued)

16-Lead Ceramic Flat Package (W)

Order Number 54LS368AFMQB or DM54LS368AW

NS Package Number W16A

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