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SN74LS155, SN74LS156 Datasheet - Motorola

SN74LS156-Motorola.pdf

This datasheet PDF includes multiple part numbers: SN74LS155, SN74LS156. Please refer to the document for exact specifications by model.

Datasheet Details

Part number:

SN74LS155, SN74LS156

Manufacturer:

Motorola

File Size:

Direct Link

Description:

Dual 1-of-4 decoder / demultiplexer.

Note:

This datasheet PDF includes multiple part numbers: SN74LS155, SN74LS156.
Please refer to the document for exact specifications by model.

SN74LS155, SN74LS156, DUAL 1-OF-4 DECODER / DEMULTIPLEXER

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

When enabled, each decoder section accepts the binary weighted Address inputs (A0, A1) and provides four mutually exclusive active LOW outputs (O0 * O3).

If the Enable requ

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

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