Motorola SN54LS151J, SN74LS151N, SN74LS151D Datasheet

8-INPUT MULTIPLEXER

The TTL /MSI SN54 /74LS151 is a high speed 8-input Digital Multiplexer. It provides, in one package, the ability to select one bit of data from up to eight sources. The LS151 can be used as a universal function generator to generate any logic function of four variables. Both assertion and negation outputs are provided.

•Schottky Process for High Speed

•Multifunction Capability

•On-Chip Select Logic Decoding

•Fully Buffered Complementary Outputs

•Input Clamp Diodes Limit High Speed Termination Effects

CONNECTION DIAGRAM DIP (TOP VIEW)

	VCC		I4		I5		I6		I7		S0		S1		S2
	16		15		14		13		12		11		10		9

	1		2		3		4		5		6				7				8
	I3		I2		I1		I0		Z			Z			E				GND

PIN NAMES		LOADING (Note a)
		HIGH		LOW
S0 ± S2	Select Inputs	0.5	U.L.	0.25	U.L.
E	Enable (Active LOW) Input	0.5	U.L.	0.25	U.L.
I0 ± I7	Multiplexer Inputs	0.5	U.L.	0.25	U.L.
Z	Multiplexer Output (Note b)	10	U.L.	5 (2.5)	U.L.
Z	Complementary Multiplexer Output	10	U.L.	5 (2.5)	U.L.
	(Note b)

NOTES:

a)1 TTL Unit Load (U.L.) = 40 μA HIGH/1.6 mA LOW.

b)The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges.

SN54/74LS151

8-INPUT MULTIPLEXER

LOW POWER SCHOTTKY

			J SUFFIX
			CERAMIC
			CASE 620-09
16	1
			N SUFFIX
			PLASTIC
16			CASE 648-08
	1
			D SUFFIX
	16		SOIC
			CASE 751B-03
		1

ORDERING INFORMATION

SN54LSXXXJ Ceramic

SN74LSXXXN Plastic

SN74LSXXXD SOIC

LOGIC SYMBOL

		7			4	3		2		1 15 14 13 12
			E I0 I1					I2 I3 I4 I5 I6 I7
11			S0
10			S1
9			S2
								Z			Z
								6		5

VCC = PIN 16

GND = PIN 8

FAST AND LS TTL DATA

5-252

SN54/74LS151

LOGIC DIAGRAM

I0	I1	I2	I3	I4		I5	I6	I7
9	4	3	2	1	15	14	13	12
S2
10
S1
11
S0
7
E

VCC = PIN 16
GND =	PIN	8		6 5
=	PIN	NUMBERS	Z	Z

FUNCTIONAL DESCRIPTION

The LS151 is a logical implementation of a single pole,

Z = E (I0 S0

S1 S2 +

I1

S0 S1 S2

+

I2

S0 S1

S2

8-position switch with the switch position controlled by the

+ I3 S0 S1

S2

+ I4

S0 S1 S2

+ I5

S0

S1

S2 + I6

S0

state of three Select inputs, S0, S1, S2. Both assertion and

S1 S2 + I7 S0

S1

S2).

negation outputs are provided. The Enable input (E) is active

The LS151 provides the ability, in one package, to select

LOW. When it is not activated, the negation output is HIGH

from eight sources of data or control information. By proper

and the assertion output is LOW regardless of all other inputs.

manipulation of the inputs, the LS151 can provide any logic

The logic function provided at the output is:

function of four variables and its negation.

TRUTH TABLE

E

S2 S1 S0

I0

I1

I2

I3 I4 I5 I6

I7

Z

Z

H

X X X

X X X X X X X X

H L

L

L L L

L

X X X X X X X

H L

L

L L L

H X X X X X X X

L H

L

L L H

X L

X X X X X X

H L

L

L L H

X H X X X X X X

L H

L

L H L

X X L X X X X X

H L

L

L H L

X X H X X X X X

L H

L

L H H

X X X L X X X X

H L

L

L H H

X X X H X X X X

L H

L

H L L

X X X X L X X X

H L

L

H L L

X X X X H X X X

L H

L

H L H

X X X X X L X X

H L

L

H L H

X X X X X H X X

L H

L

H H L

X X X X X X L X

H L

L

H H L

X X X X X X H X

L H

L

H H H

X X X X X X X L

H L

L

H H H

X X X X X X X H

L H

H = HIGH Voltage Level

L = LOW Voltage Level

X = Don't Care

FAST AND LS TTL DATA

5-253