SN54/74LS251 8-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
The TTL/MSI SN74LS251 is a high speed 8-Input Digital Multiplexer....
SN54/74LS251 8-INPUT 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 universal function generator to generate any logic function of four variables. Both assertion and negation outputs are provided.
8-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
LOW POWER
SCHOTTKY
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 CONNECTION DIAGRAM DIP (TOP VIEW)
VCC 16 I4 15 I5 14 I6 13 I7 12 S0 11 S1 10 S2 9
16
J SUFFIX CERAMIC CASE 620-09
1
16 1
N SUFFIX PLASTIC CASE 648-08
1 I3
2 I2
3 I1
4 I0
5 Z
6 Z
7 E0
8 GND
PIN NAMES S0–S2 E0 I0–I7 Z Z Select Inputs Output Enable (Active LOW) Inputs Multiplexer Inputs Multiplexer Output Complementary Multiplexer Output
LOADING (Note a) HIGH 0.5 U.L. 0.5 U.L. 0.5 U.L. 65 U.L. 65 U.L. LOW 0.25 U.L. 0.25 U.L. 0.25 U.L. 15 U.L. 15 U.L.
16 1
D SUFFIX SOIC CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC
I4 I5
15 14
NOTES: a. 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
LOGIC DIAGRAM
S2 S1 S0 E1
9 10 11 7
I0
4
I1
3
I2
2
I3
1
I6
13
I7
12
VCC = PIN 16 GND = PIN 8 = PIN NUMBERS Z
5
6
Z
FAST AND LS TTL DATA 5-410
SN54/74LS251
FUNCTIONAL DESCRIPTION The LS251 is a logical implement...
