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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 (non-inverted) .
Voltage Operating Ambient Temperature Range Output Current
– High Output Current
– Low Min 4.75 0 Typ 5.0 25 Max 5.25 70
– 2.6 24 Unit V °C mA mA
16
PLASTIC N SUFFIX CASE 648
1
SOIC D SUFFIX CASE 751B
ORDERING INFORMATION
Device SN74LS257BN SN74LS257BD SN74LS258BN SN74LS258BD Package 16 Pin DIP 16 Pin 16 Pin DIP 16 Pin Shipping 2000 Units/Box 2500/Tape & Reel 2000 Units/Box 2500/Tape & Reel
© Semiconductor Components Industries, LLC, 1999
1
December, 1999
– Rev. 6
Publication Order Number: SN74LS257B/D
SN74LS257B SN74LS258B
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC 16 E0 15 I0c 14 I1c 13 .
74LS257 - Fairchild Semiconductor
These Schottky-clamped high-performance multiplexers feature 3-STATE outputs that can interface directly with data lines.
74LS257 - Hitachi Semiconductor
19.20 20.00 Max 16 9 7.40 Max 6.30 Unit: mm 1 1.3 1.11 Max 8 0.51 Min 2.54 Min 5.06 Max 7.62 2.54 ± 0.25 0.48 ± .
74LS257 - National Semiconductor
These Schottky-clamped high-performance multiplexers feature TRI-STATE outputs that can interface directly with data lin.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | 74LS251 |
ON Semiconductor |
LOW POWER SCHOTTKY |
|
| 2 | 74LS251 |
Fairchild Semiconductor |
3-STATE 1-of-8 Line Data Selector/Multiplexer |
|
| 3 | 74LS251 |
Hitachi Semiconductor |
1 of 8 Data Selectors/Multiplexers |
|
| 4 | 74LS253 |
Fairchild Semiconductor |
3-STATE Data Selector/Multiplexer |
|
| 5 | 74LS256 |
Signetics |
Dual 4-Bit Addressable Latch |
|
| 6 | 74LS256 |
National Semiconductor |
Dual 4-Bit Addressable Latch |
|
| 7 | 74LS256 |
Motorola |
DUAL 4-BIT ADDRESSABLE LATCH |
|
| 8 | 74LS257B |
Fairchild Semiconductor |
3-STATE Quad 2-Data Selectors/Multiplexers |
|
| 9 | 74LS257B |
National Semiconductor |
Quad 2-Data Selectors/Multiplexers |
|
| 10 | 74LS257B |
Motorola |
QUAD 2-INPUT MULTIPLEXER |
|
| 11 | 74LS257B |
Texas Instruments |
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS |
|
| 12 | 74LS258B |
National Semiconductor |
Quad 2-Data Selectors/Multiplexers |
|