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N4983A Multiplexer and Demultiplexer

Product Status: Discontinued | Currently Supported
This product is no longer available

No replacement found for this product.

Key Features & Specifications


  • N4983A-M40 4:1 multiplexer operating from 2 to 44 Gb/s
  • N4983A-D40 1:4 demultiplexer operating from 2.6 to 44 Gb/s
  • Low power consumption
  • Low output jitter
  • Precision connectors (2.92 mm)


The Keysight Technologies N4983A-M40 broadband 4 to 1 multiplexer operates from 2 to 44 Gb/s. The four quarter-rate inputs are single-ended and AC-coupled, while the full-rate data output is fully differential and DC-coupled. The N4983A multiplexer accepts a half-rate input clock and returns a quarter-rate output clock for driving other circuits. A clock crossing point adjustment pin allows correction for duty cycle distortion. Power supply bias of negative 3.6 V is required.

The Keysight Technologies N4983A-D40 broadband 1 to 4 demultiplexer operates from 2.6 to 44 Gb/s. Differential data inputs are DC-coupled and terminated to ground with 50 ohm resistors to minimize reflections. The single-ended, half-rate clock input is AC-coupled and operates with low input power. The N4983A demultiplexer features single-ended AC-coupled outputs with ECL compatible signal levels.


  • OC-768/STM-256,
  • 100G Ethernet (4 x 25.78 Gb/s)
  • High bit rate research