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54LS257B - QUAD 2-INPUT MULTIPLEXER

General Description

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.

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📁 Similar Datasheet

Part Number Description Manufacturer
54LS257B Quad 2-Data Selectors/Multiplexers National Semiconductor
54LS257B QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS Texas Instruments
54LS257A TRI-STATE Quad 2-Data Selectors/Multiplexers National Semiconductor
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Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
54LS256 DUAL 4-BIT ADDRESSABLE LATCH
54LS258B QUAD 2-INPUT MULTIPLEXER
54LS21 DUAL 4-INPUT AND GATE
54LS22 DUAL 4-INPUT NAND GATE
54LS26 QUAD 2-INPUT NAND BUFFER

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.