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The LS257B and LS258B are Quad 2-Input Multiplexers with 3-state outputs. They select four bits of data from two sources each under control of a Common Data Select Input. When the Select Input is LOW, the I0 inputs are selected and when Select is HIGH, the I1 inputs are selected. The data on the selected inputs appears at the outputs in true (noninverted) fo.
4 56 78 S I0a I1a Za I0b I1b Zb GND VCC E0 I0c I1c Zc I0d I1d Zd 16 15 14 13 12 11 10 9 SN54/74LS258B 1 2 3 4 56 78 S I0a I1a Za I0b I1b Zb GND NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. SN54/74LS257B SN54/74LS258B QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS LOW POWER SCHOTTKY 16 1 16 1 16 1 J SUFFIX CERAMIC CASE 620-09 N SUFFIX PLASTIC CASE 648-08 D SUFFIX SOIC CASE 751B-03 ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC FAST AND LS TTL DATA 5-1 SN54/74LS257B D SN54/74LS258B LOGIC DIAGRAMS SN54 / 74.
54LS258B - National Semiconductor
These Schottky-clamped high-performance multiplexers feature TRI-STATE outputs that can interface directly with data lin.
54LS258B - Texas Instruments
SN54LS257B, SN54LS258B, SN54S257, SN54S258 SN74LS257B, SN74LS258B, SN74S257, SN74S258 QUADRUPLE 2-LINE TO 1-LINE DATA SE.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | 54LS258A |
National Semiconductor |
TRI-STATE Quad 2-Data Selectors/Multiplexers |
|
| 2 | 54LS256 |
National Semiconductor |
Dual 4-Bit Addressable Latch |
|
| 3 | 54LS256 |
Motorola |
DUAL 4-BIT ADDRESSABLE LATCH |
|
| 4 | 54LS257A |
National Semiconductor |
TRI-STATE Quad 2-Data Selectors/Multiplexers |
|
| 5 | 54LS257B |
National Semiconductor |
Quad 2-Data Selectors/Multiplexers |
|
| 6 | 54LS257B |
Motorola |
QUAD 2-INPUT MULTIPLEXER |
|
| 7 | 54LS257B |
Texas Instruments |
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS |
|
| 8 | 54LS20 |
National Semiconductor |
Dual 4-Input NAND Gates |
|
| 9 | 54LS21 |
National Semiconductor |
Dual 4-Input AND Gates |
|
| 10 | 54LS21 |
Motorola |
DUAL 4-INPUT AND GATE |
|
| 11 | 54LS22 |
National Semiconductor |
Dual 4-Input NAND Gates |
|
| 12 | 54LS22 |
Motorola |
DUAL 4-INPUT NAND GATE |
|