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New LVDS Transceiver from TI Supports Clock Frequencies for Consumer Applications

Bidirectional Device Reduces System Component Count

Jul 14, 2005

DALLAS (July 14, 2005) – Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced a 14-bit low-voltage differential signaling (LVDS) serializer/deserializer (SERDES) that saves system cost and board space in consumer electronics products. The device supports a phase-locked loop (PLL) range of 10 MHz to 100 MHz without needing external PLL components. It is suitable for a vast array of consumer applications requiring bidirectional data flows, such as memory cards where data can be written as well as read. (See www.ti.com/sc05149.)

The SN75LVDT1422 full duplex SERDES reduces system space and component requirements by incorporating in a single device a 14-bit serializer and 14-bit deserializer, each operating independently. The serializer accepts 14 transistor-transistor logic (TTL) input lines and generates two LVDS high-speed serial streams plus one LVDS clock signal. The deserializer accepts three LVDS input signals, including two high-speed serial streams and one LVDS clock signal, and drives out 14 TTL data signals plus one TTL clock. The LVDT1422 provides three termination resistors for the differential LVDS inputs, thereby minimizing cost and board space, while providing better overall signal integrity.

Additional Key Features and Benefits

• 175 Mbytes/sec in TX/RX modes enables video transfer over distances not possible with TTL

• Supports spread spectrum clocking

• Reduces cable size, cost and system electromagnetic interference (EMI)

• Low Power: < 360 mW typical at 100 MHz and power-down mode typical at < 500 uW

• Operates over free-air temperature range of –10°C to 70°C

• Inputs and Outputs Compatible with TIA/EIA-644 LVDS Standard

Available Today

The LVDT1422 is available now in a Lead (Pb)-Free 64-pin thin quad flat package (TQFP) from TI and its authorized distributors. The device is priced at $3.70 in 1,000 piece quantities (suggested resale pricing).

TI offers analog engineers a wide-ranging support infrastructure that includes design tools and utilities, technical documentation, training and seminars, evaluation modules, an online KnowledgeBase, a product information hotline and a comprehensive offering of samples that ship within 24 hours of request. For more information on TI´s complete analog design support, and to download the LVDS Application and Data Handbook, visit www.ti.com/analog