Multiplexers reconstruct impaired HDMI, DVI signals

Milpitas, Calif.—Intersil Corp. launched a family of timing regenerators and multiplexers for HDMI and DVI applications.

According to Intersil, the ISL54100, ISL54101, and ISL54102 are the only TMDS (Transition Minimized Differential Signaling) products on the market that perform both retiming and input switching in a single chip.

The ISL54100 is a 4:1 (4 inputs, 1 output) multiplexer, targeted for applications with many HDMI or DVI inputs, such as TV and A/V receivers or professional DVI switching applications. The ISL54102 provides a 2:1 function, while the ISL54101 is a 1:1 regenerator, useful for cleaning up TMDS signals where there is no need for multiple inputs.

All three products feature a programmable equalizer and a clock and data recovery (CDR) function for each of the three TMDS pairs in an HDMI or DVI signal. The three CDRs completely recreate the signal in both the time and voltage domains. The TMDS data outputs of the ISL54100, ISL54101, and ISL54102 are regenerated and realigned to the regenerated TMDS clock signal, creating a clean, low-jitter signal that can be easily decoded by DVI/HDMI receivers, including HDMI 1.3-compliant devices. Since the output of the ISL5410X ICs is completely regenerated, their output signals are often lower jitter and higher quality than the original source.

The ISL54100, ISL54101, and ISL54102 are targeted for use in stand-alone HDMI and DVI multiplexers and repeaters, Audio/Video receivers, TVs, set top boxes, and DVD players and recorders.

The ISL54100, ISL54101, and ISL54102 are available now in a 128 Ld MQFP and are priced at $20, $15 and $10 each, respectively, in 1,000-unit quantities.

Datasheets: Click here.

Intersil Corp.,

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