Deserializers lessen wires, traces

Maxim Integrated Products introduces the latest members of its high-speed LVDS SerDes family, which are hot-swappable 21-bit, DC-balanced LVDS deserializers. The MAX9234, MAX9236 and MAX9238 deserialize three LVDS serial inputs into 21 single-ended LVTTL/LVCMOS outputs, and communicate over a 3-wire twisted pair or differential line. Each product reduces the number of wires or traces from 22 to 8, which simplifies design and saves space and cost in system interconnects such as cables and backplanes.

In addition, hot-swappable capability increases fault tolerance and allows "on-the-fly" frequency programming. Advanced proprietary and integrated data coding reduce EMI, and the LVDS outputs meet the requirements of the ANSI TIA/EIA 644 LVDS standard.

The MAX9234/MAX9236 deserializers are suitable for driving 480 x 800 resolutions LCD displays, automotive navigation and entertainment systems, digital copiers, laser printers, network switches/routers, and base stations. Meanwhile, the MAX9238's high clock rate allows driving 768 x 1,024 resolution LCD displays.

DC-balanced outputs allow isolation between serializer and deserializer by using AC coupling. The DC-balanced feature reduces bit errors in the deserializers due to shift in the common mode caused by ground shift. The maximum, aggregate payload data rate is 1.386Gbps.

The three new products from Maxim feature a separate output supply for interfacing to 1.8V to 5V logic-level inputs. All devices are specified for operation from -40°C to 85°C. The LVDS outputs meet ISO 10605 (±25kV air, ±8kV contact).

These three deserializers are function and pin compatible with the MAX9210, MAX9220 and MAX9222 deserializers, respectively. They also communicate with the MAX9209 and MAX9213 21-bit DC-balanced serializers.

The MAX9234, MAX9236 and MAX9238 are housed in a 48-pin, low-profile TSSOP package, with prices starting at $3.90 (1,000-up, FOB USA).