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SN74LS155 - DUAL 1-OF-4 DECODER / DEMULTIPLEXER

Download the SN74LS155 datasheet PDF. This datasheet also covers the SN74LS156 variant, as both devices belong to the same dual 1-of-4 decoder / demultiplexer family and are provided as variant models within a single manufacturer datasheet.

General Description

The LS155 and LS156 are Dual 1-of-4 Decoder/Demultiplexers with common Address inputs and separate gated Enable inputs.

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Note: The manufacturer provides a single datasheet file (SN74LS156-Motorola.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
SN74LS155 DUAL 1-OF-4 DECODER / DEMULTIPLEXER ON Semiconductor
SN74LS155A DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS Texas Instruments
SN74LS151 8-Input Multiplexer ON Semiconductor
SN74LS151 Data Selectors/Multiplexers Texas Instruments
SN74LS153 Dual 4-Input Multiplexer ON Semiconductor

Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
SN74LS15 TRIPLE 3-INPUT AND GATE
SN74LS151 8-INPUT MULTIPLEXER
SN74LS153 DUAL 4-INPUT MULTIPLEXER
SN74LS156 DUAL 1-OF-4 DECODER/ DEMULTIPLEXER
SN74LS157 QUAD 2-INPUT MULTIPLEXER

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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DUAL 1-OF-4 DECODER/ DEMULTIPLEXER The SN54 / 74LS155 and SN54 / 74LS156 are high speed Dual 1-of-4 Decoder/Demultiplexers. These devices have two decoders with common 2-bit Address inputs and separate gated Enable inputs. Decoder “a” has an Enable gate with one active HIGH and one active LOW input. Decoder “b” has two active LOW Enable inputs. If the Enable functions are satisfied, one output of each decoder will be LOW as selected by the address inputs. The LS156 has open collector outputs for wired-OR (DOT-AND) decoding and function generator applications. The LS155 and LS156 are fabricated with the Schottky barrier diode process for high speed and are completely compatible with all Motorola TTL families.