Motorola SN54LS257BJ, SN54LS258BJ, SN74LS258BN, SN74LS258BD, SN74LS257BN Datasheet
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QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
The LSTTL/MSI SN54/74LS257B and the SN54/74LS258B are Quad 2-Input Multiplexers with 3-state outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (non-inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (EO) Input, allowing the outputs to interface directly with bus oriented systems. It is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families.
•Schottky Process For High Speed
•Multiplexer Expansion By Tying Outputs Together
•Non-Inverting 3-State Outputs
•Input Clamp Diodes Limit High Speed Termination Effects
•Special Circuitry Ensures Glitch Free Multiplexing
•ESD > 3500 Volts
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC |
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E0 |
I0c |
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I1c |
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Zc |
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I0d |
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I1d |
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Zd |
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SN54/74LS257B |
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VCC = PIN 16 |
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GND = PIN 8 |
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S |
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I0a |
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I1a |
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Za |
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I0b |
I1b |
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Zb |
GND |
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VCC |
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E0 |
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I0c |
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I1c |
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Zc |
I0d |
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I1d |
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Zd |
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NOTE: |
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SN54/74LS258B |
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The Flatpak version |
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has the same pinouts |
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(Connection Diagram) as |
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the Dual In-Line Package. |
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S |
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I0a |
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I1a |
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Za |
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I0b |
I1b |
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Zb |
GND |
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SN54/74LS257B
SN54/74LS258B
QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
LOW POWER SCHOTTKY
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J SUFFIX |
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CERAMIC |
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CASE 620-09 |
16 |
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N SUFFIX |
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PLASTIC |
16 |
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CASE 648-08 |
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1 |
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D SUFFIX |
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SOIC |
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CASE 751B-03 |
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1 |
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ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
FAST AND LS TTL DATA
5-427
SN54/74LS257B D SN54/74LS258B
LOGIC DIAGRAMS
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SN54 / 74LS257B |
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E0 |
I0a |
I1a |
I0b |
I1b |
I0c |
I1c |
I0d |
I1d |
S |
15 |
2 |
3 |
5 |
6 |
14 |
13 |
11 |
10 |
1 |
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4 |
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7 |
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12 |
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9 |
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Za |
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Zb |
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Zc |
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Zd |
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SN54 / 74LS258B |
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E0 |
I0a |
I1a |
I0b |
I1b |
I0c |
I1c |
I0d |
I1d |
S |
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15 |
2 |
3 |
5 |
6 |
14 |
13 |
11 |
10 |
1 |
VCC = PIN 16 |
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4 |
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7 |
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12 |
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9 |
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GND |
= |
PIN |
8 |
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= |
PIN |
NUMBERS |
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Za |
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Zb |
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Zc |
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Z |
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d |
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FAST AND LS TTL DATA
5-428
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