Clock Distribution Circuits and ALVC Logic from Texas Instruments Meet Intel's PC100 Specifications
DALLAS (April 20, 1998) -- Texas Instruments (TI) (NYSE:TXN) announced today that it has available clock distribution circuits and Advanced Low-Voltage CMOS (ALVC) logic devices that support PC bus speeds of up to 100 MHz. These products will allow PC system designers to move data between the microprocessor and its dual in-line memory modules (DIMMs) at much faster speeds than can currently be realized in today's PCs. The end result is a significant improvement in the speed and ultimately, the capability of personal computers. The 100 MHz bus speed is part of Intel's PC100 specification -- the new high-speed standard for synchronous memory interface on computer motherboards.
The clock driver circuits (CDCs), designated CDC2509A and CDC 2510A, use phase locked loop (PLL) technology to synchronize both the phase and the frequency of the clock signals. The CDC2509A and the CDC2510A also support spread spectrum modulation of timing signals - a technique that reduces the system's electromagnetic interference or EMI. In addition, a non-spread spectrum version of these devices - the CDC2509 and the CDC2510 - will be available along with the CDC2509A and CDC2510A in second quarter 1998. All of these products are part of a large family of CDCs available from TI that includes clock buffers, clock drivers with dividers, PLL clock drivers and clock synthesizers. The clock buffer family includes the recently released CDC318, an 18-output clock buffer with individually selected I2C control interface. CDC318 is designed for use on motherboards that support PC100 specifications and is optimized to interface with TI's PC100 clock drivers.
"With the variety in our CDC portfolio, DIMM manufacturers know they can find the optimum solution for their product from TI," said Sameer Vuyyuru, marketing manager for TI's CDC business. "Today, we've extended that support with the addition of PC100-compliant PLL CDCs."
More information on TI's family of CDCs can be found on the World Wide Web at 
http://www.ti.com/sc/cdc
In addition to CDCs, TI's ALVC family of logic devices includes five memory drivers ideally suited for implementing the PC100 standard--ALVC16835, ALVC162835, ALVC16334, ALVC162334, and ALVC162836. All of these devices are available now from TI. With this selection of 16-, 18- and 20-bit devices, designers can choose a driver that best fits the bit-width requirements of a specific DIMM design. Optimizing the system design reduces both board space requirements and system costs. Finally, all of these devices feature latch-enable (LE) circuitry -- allowing the DIMM to operate in both registered and buffered modes.
"With its family of ALVC products, TI offers a total logic solution for PC100 DIMM designs, said Ed Agis, world-wide Standard Linear and Logic product marketing manager for TI. "As the industry's largest supplier of logic, we also have the reference guides and tools for making designers' jobs as simple as possible."
More information on TI's family of PC100 logic devices can be found on the World Wide Web at http://www.ti.com/sc/docs/asl/pc100.htm
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