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SN74LS398 Datasheet QUAD 2-PORT REGISTER

Manufacturer: Motorola Semiconductor (now NXP Semiconductors)

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). The selected data is transferred to the output register on the LOW-to-HIGH transition of the Clock input.

Download the SN74LS398 datasheet PDF. This datasheet also includes the SN74LS398D variant, as both parts are published together in a single manufacturer document.

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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.

More Datasheets from Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
SN74LS398D QUAD 2-PORT REGISTER
SN74LS390 DUAL DECADE COUNTER / DUAL 4-STAGE BINARY COUNTER
SN74LS393 DUAL DECADE COUNTER / DUAL 4-STAGE BINARY COUNTER
SN74LS395 4-BIT SHIFT REGISTER
SN74LS399 QUAD 2-PORT REGISTER
SN74LS30 8-INPUT NAND GATE
SN74LS32 QUAD 2-INPUT OR GATE
SN74LS322A 8-BIT SHIFT REGISTERS
SN74LS323 8-BIT SHIFT/STORAGE REGISTER
SN74LS33 QUAD 2-INPUT NOR BUFFER