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54LS398 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 54LS398 datasheet PDF. This datasheet also includes the 54LS399 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
54LS399 QUAD 2-PORT REGISTER
54LS373 OCTAL TRANSPARENT LATCH
54LS374 OCTAL TRANSPARENT LATCH
54LS385 Low-Power Schottky
54LS386 QUAD 2-INPUT EXCLUSIVE-OR GATE
54LS04 HEX INVERTER
54LS122 RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
54LS123 RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
54LS138 1-OF-8 DECODER/DEMULTIPLEXER
54LS155 DUAL 1-OF-4 DECODER/DEMULTIPLEXER