The MAX9254 from Maxim Integrated Products is the latest
member of its LVDS SERDES family. The device is a hot-swappable, high-output-drive, 21-bit, dc-balanced LVDS de-serializer with programmable
spread spectrum. This device spreads output clock and data over a specified ±2% or ±4% range to reduce EMI.

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The MAX9254 reduces the number of wires/traces from 22 to eight. It is compatible with the MAX9209/MAX9213 serializers and is suited for driving 800 x 480 resolution displays in automotive navigation and entertainment systems.

When the MAX9254 operates at a 40 MHz clock speed, the maximum aggregate payload data rate is 840 Mbps. Higher output-drive capability enables the device to meet LCD setup and hold times in the presence of higher capacitive loads.

Dc-balancing provides two notable advantages. First, it reduces bit errors resulting from a change in common mode when a ground shift occurs, thus allowing isolation between the serializer and deserializer. Secondly, it also allows the ac coupling of LVDS inputs, which provides short-to-battery protection.

The MAX9254 deserializes three LVDS serial inputs into 21 single-ended LVTTL/LVCMOS outputs and communicates over a 3-wire twisted-pair/differential line. The LVDS inputs meet the requirements of both the ANSI/TIA/EIA-644 LVDS standard and the ISO 10605 standard (±25 kV Air, ±8 kV Contact). A separate output supply interfaces to 1.8 V to 5 V logic-level inputs.

Hot-swap capability increases fault tolerance and allows "on-the-fly" frequency programming. The component is available in a 48-pin, low-profile TSSOP package. Prices start at $4.62 for 1000 pieces.