SN74LS251DW Motorola, SN74LS251DW Datasheet

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SN74LS251DW

Manufacturer Part Number
SN74LS251DW
Description
8-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
Manufacturer
Motorola
Datasheet
8-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
provides, in one package, the ability to select one bit of data from up to eight
sources. The LS251 can be used as a universal function generator to
generate any logic function of four variables. Both assertion and negation
outputs are provided.
NOTES:
a. 1 TTL Unit Load (U.L.) = 40 A HIGH/1.6 mA LOW.
LOGIC DIAGRAM
PIN NAMES
S 0 –S 2
E 0
I 0 –I 7
Z
Z
The TTL/MSI SN74LS251 is a high speed 8-Input Digital Multiplexer. It
Schottky Process for High Speed
Multifunction Capability
On-Chip Select Logic Decoding
Inverting and Non-Inverting 3-State Outputs
Input Clamp Diodes Limit High Speed Termination Effects
S 2
S 1
S 0
E 1
V CC = PIN 16
GND = PIN 8
CONNECTION DIAGRAM DIP (TOP VIEW)
V CC
Select Inputs
Output Enable (Active LOW) Inputs
Multiplexer Inputs
Multiplexer Output
Complementary Multiplexer Output
16
I 3
1
10
11
= PIN NUMBERS
9
7
15
I 4
2
I 2
14
I 5
I 1
3
I 6
13
I 0
4
12
I 7
5
Z
S 0
11
6
Z
I 0
FAST AND LS TTL DATA
4
S 1
10
E 0
7
0.5 U.L.
0.5 U.L.
0.5 U.L.
HIGH
65 U.L.
65 U.L.
LOADING (Note a)
I 1
GND
S 2
9
8
3
5-410
I 2
2
0.25 U.L.
0.25 U.L.
0.25 U.L.
LOW
15 U.L.
15 U.L.
I 3
1
Z
I 4
5
15
6
Z
16
16
SN54/74LS251
I 5
WITH 3-STATE OUTPUTS
ORDERING INFORMATION
8-INPUT MULTIPLEXER
LOW POWER SCHOTTKY
16
14
1
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXDW SOIC
1
1
I 6
13
I 7
Ceramic
Plastic
12
CASE 751B-03
CASE 620-09
CASE 648-08
CERAMIC
N SUFFIX
D SUFFIX
J SUFFIX
PLASTIC
SOIC

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SN74LS251DW Summary of contents

Page 1

MULTIPLEXER WITH 3-STATE OUTPUTS The TTL/MSI SN74LS251 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 LS251 can be used as a ...

Page 2

FUNCTIONAL DESCRIPTION The LS251 is a logical implementation of a single pole, 8-position switch with the switch position controlled by the state of three Select inputs Both assertion and negation outputs ...

Page 3

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Symbol Symbol Parameter Parameter V IH Input HIGH Voltage V IL Input LOW Voltage V IK Input Clamp Diode Voltage V OH Output HIGH Voltage Output LOW Voltage Output LOW ...

Page 4

V IN 1 PLH t PHL 1 OUT Figure 1 PZL t PLZ V OUT 1.3 V 0.5 V Figure ...

Page 5

G - 0.25 (0.010 - SEATING -T- PLANE 0.25 (0.010) ...

Page 6

... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different applications. All operating parameters, including “ ...

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