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Programmable Spread-Spectrum, Single-Link, 27-Bit, DC-Balanced Serializer/Deserializer Chipset Reduces EMI for LCD Displays
SUNNYVALE, CA-February 15, 2006-Maxim Integrated
Products (NASDAQ: MXIM) introduces the latest
members of the Company's high-speed LVDS SERDES
family-the MAX9247 serializer and MAX9248
deserializer, a programmable spread-spectrum,
27-bit, DC-balanced LVDS chipset. To reduce EMI,
the MAX9247 provides proprietary data encoding,
while the MAX9248's output clock and data are
spread over a specified range of ±2% or ±4%. The
chipset further reduces EMI by communicating over
a DC-balanced, single twisted-pair or
differential line, which not only allows
isolation between the serializer and deserializer
through AC-coupling, but also simplifies design
and reduces system cost. The MAX9247/MAX9248
operate over a wide 2.5MHz to 42MHz frequency
range, making them ideal for QVGA to WVGA LCD
displays up to 1280 x 480 resolution, as used in
automotive navigation and infotainment systems.
The MAX9247 serializes 18-bits of LVTTL/LVCMOS
RGB digital video data, 9-bits of LVTTL/LVCMOS
control data, and clock into a single LVDS serial
clock and data stream. The MAX9248 then
deserializes that single LVDS serial input into
27 single-ended LVTTL/LVCMOS outputs. The
chip-set thus reduces the number of wires or
traces from 28 to 2, saving space and cost in
system interconnects such as cables and
backplanes. Hot-swappable capability increases
fault tolerance and allows "on-the-fly" frequency
programming. The LVDS input and output signals
meet the requirements of the ANSI TIA/EIA 644
LVDS standard.
The MAX9247 operates from a 3.3V ±10% core supply
and features a separate input supply for
interfacing to 1.8V to 3.3V logic levels. The
MAX9248 features a separate output supply for
interfacing to 1.8V to 3.3V logic level inputs.
Both devices are specified for operation from -40
degrees Celsius to +85 degrees Celsius. The LVDS
inputs and outputs meet IEC 61000-4-2 Level 4 ESD
specifications (±15kV Air Discharge, ±8kV
Contact Discharge), as well as ISO 10605 (±30kV
Air Discharge, ±10kV Contact Discharge).
The MAX9247 and MAX9248 are available in 48-pin
TQFP and TQFN* packages. Prices start at $5.86
(1000 up, FOB USA).
*Future product-contact factory for availability.
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