Philips N74ALS151D Datasheet

INTEGRATED CIRCUITS

74ALS151

8-input multiplexer

Product specification

1991 Feb 08

IC05 Data Handbook

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Philips Semiconductors	Product specification
8-input multiplexer	74ALS151

FEATURES

•8-to-1 multiplexing

•On chip decoding

•Multi-function capability

•Complementary outputs

•See 74ALS251 for 3-State version

DESCRIPTION

The 74ALS151 is a logic implementation of a single 8-position switch with the switch position controlled by the state of three select (S0, S1, S2) inputs. True (Y) and complementary (Y) outputs are both provided.

The enable (E) is active-Low. When E is High, Y output is Low and

the Y output is High regardless of all other inputs.

		TYPICAL	TYPICAL
	TYPE		SUPPLY CURRENT
		PROPAGATION DELAY
			(TOTAL)
	74ALS151	8.0ns	8.0mA

PIN CONFIGURATION

I3			1				16	VCC
I2								I4
			2				15
I1								I5
			3				14
I0								I6
			4				13
Y								I7
			5				12
								S0
	Y		6				11
								S1
	E		7				10
GND								S2
			8				9

			SF00742
	ORDERING INFORMATION
		ORDER CODE
			DRAWING
	DESCRIPTION	COMMERCIAL RANGE
			NUMBER
		VCC = 5V ±10%,
		Tamb = 0°C to +70°C
	16-pin plastic DIP	74ALS151N	SOT38-4
	16-pin plastic SO	74ALS151D	SOT109-1

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS																		DESCRIPTION								74ALS (U.L.)							LOAD VALUE
																											HIGH/LOW						HIGH/LOW
I0 ± I7							Data inputs																				1.0/1.0						20μA/0.1mA
S0 ± S2							Select inputs																				1.0/1.0						20μA/0.1mA
E							Enable input (active-Low)																				1.0/1.0						20μA/0.1mA
Y,							Data outputs																				130/240						2.6mA/24mA
		Y
NOTE: One (1.0) ALS unit load is defined as: 20μA in the High state and 0.1mA in the Low state.
LOGIC SYMBOL																								IEC/IEEE SYMBOL
				4		3		2			1		15			14		13		12
																								7				EN			MUX
																										11
																												0
																								10									5
																															0
				I0		I1		I2			I3			I4		I5		I6		I7				9						G
																															7
11				S0																						4		2
																										3							6
10				S1
																										2
9				S2
																										1
7				E
									Y				Y													15
																										14
																										13
VCC = Pin 16																								12
								5					6
GND = Pin 8																						SF00743											SF00744

1991 Feb 08

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853±1022 01670

Philips Semiconductors	Product specification
8-input multiplexer	74ALS151

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

	VCC = Pin 16		5		6
		Y		Y
	GND = Pin 8
						SF00741

FUNCTION TABLE

INPUTS

OUTPUTS

S2

S1

S0

E

Y

Y

X

X

X

H

L

H

L

L

L

L

I0

I0

L

L

H

L

I1

I1

L

H

L

L

I2

I2

L

H

H

L

I3

I3

H

L

L

L

I4

I4

H

L

H

L

I5

I5

H

H

L

L

I6

I6

H

H

H

L

I7

I7

H

=

High voltage level

L

=

Low voltage level

X

=

Don't care

1991 Feb 08

3