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SN54LS399 Datasheet QUAD 2-PORT REGISTER

Manufacturer: Motorola Semiconductor (now NXP Semiconductors)

Download the SN54LS399 datasheet PDF. This datasheet also includes the SN54LS398 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (SN54LS398_MotorolaInc.pdf) that lists specifications for multiple related part numbers.

Overview

QUAD 2-PORT REGISTER The SN54 / 74LS398 and SN54 / 74LS399 are Quad 2-Port Registers.

They are the logical equivalent of a quad 2-input multiplexer followed by a quad 4-bit edge-triggered register.

A Common Select input selects between two 4-bit input ports (data sources).

Key Features

  • both Q and Q inputs, while the SN54/ 74LS399 has only Q outputs.
  • Select From Two Data Sources.
  • Fully Positive Edge-Triggered Operation.
  • Both True and Complemented Outputs on SN54/ 74LS398.
  • Input Clamp Diodes Limit High-Speed Termination Effects.

📁 Similar Datasheet

Brand Logo Part Number Description Manufacturer
Texas Instruments Logo SN54LS399 QUADRUPLE 2-INPUT MULTIPLEXER Texas Instruments
Texas Instruments Logo SN54LS399J QUADRUPLE 2-INPUT MULTIPLEXER Texas Instruments

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