IDT Announces World's First JESD204B Clock Buffer for 2G, 3G and 4G LTE Wireless Infrastructure Syst


IDT Announces World's First JESD204B Clock Buffer for 2G, 3G and 4G LTE Wireless Infrastructure Systems

IDT's Low-noise, Configurable, JESD204B Fanout Buffer Distributes High-quality Clock Signals to Data Converters in Wireless Base Stations for Optimal System Performance and Cost Efficiency

SAN JOSE, Calif.--(BUSINESS WIRE)-- Integrated Device Technology, Inc. (IDT®) (NAS: IDTI) , the Analog and Digital Company™ delivering essential mixed-signal semiconductor solutions, today announced the world's first clock fanout buffer supporting high-speed JESD204B clocking. The low-noise, configurable clock buffer complements IDT's JESD204B RF-PLL chipset, functioning to replicate and distribute high-quality clock and system synchronization reference (SYSREF) signals to data converters in GSM, WCDMA and LTE base station radio cards. Promoting optimal system performance and cost efficiency, this innovative device continues the expansion of IDT's industry-leading wireless infrastructure timing portfolio.

The IDT 8V79S690i is a two-channel JESD204B clock and SYSREF fanout buffer with configurable phase delay and extremely low additive phase noise, offering maximum design flexibility and performance. Supporting frequencies such as 614.4 MHz and 1228.8 MHz, IDT's clock buffer addresses the latest generation of high-speed JESD204B analog-to-digital (ADC) and digital-to-analog (DAC) data converters, delivering high-quality, synchronous clock and SYSREF signals to improve overall base station signal quality and increase data throughput via lower system bit error rates (BER). Furthermore, base-station developers may reduce system costs by simplifying filters as a result of less noise in the signal path. Together, the 8V79S690i clock buffer, 8V19N486i RF-PLL, and 8V19N476i clock synthesizer chipset comprise the industry's highest-performance and most complete JESD204B clocking solution on the market.

"The new fanout buffer complements our RF-PLL and clock synthesizer, giving our customers the tools needed to build the highest-performance JESD204B-based systems," said Christian Kermarrec, vice president and general manager of the Timing and Synchronization Division at IDT. "With additive phase jitter below 20 fs RMS at 1228.8 MHz, multiple clock fanout channels, and configurable phase delay for each SYSREF output, the 8V79S690i offers the performance and flexibility expected of IDT - the world's leader in timing solutions. The new clock buffers increase IDT's serviceable timing market, adding to our rich portfolio of products for wireless infrastructure applications, including performance-leading JESD204B-based data converters, data compression, RF signal chain, and RapidIO®."

Using silicon-germanium (SiGe) technology, the 8V79S690i clock buffer supports the distribution of high frequency clocks and SYSREF signals with low additive phase noise and high power supply noise rejection. The two-channel device offers a 1:10 LVPECL/LVDS clock fan-out, and a 1:8 LVDS fan-out for the SYSREF signal. The clock outputs are configurable for both amplitude and phase delay (101 picosecond steps) for flexibility in achieving radio board synchronization as well as fine-tuning the system for optimal performance. In addition, a configurable power-down control enables sophisticated power saving schemes for improved system efficiency.

The features offered by the 8V79S690i not only provide exceptional performance and flexibility in the radio board design, but allow system designers to save components previously required for signal level conversion and correction.


The IDT 8V79S690i is currently sampling to qualified customers and is available in a 72-lead 10x10 mm VFQFPN package. To learn more about IDT's industry-leading timing portfolio, visit or contact your local sales representative.

About IDT Clock and Timing Solutions

With a product portfolio 10 times greater and broader than any other, IDT is the world's leader in silicon timing and is in a unique position to address the needs of virtually any application. With the industry's largest market share, IDT is the only one-stop-shop for timing, offering products from full-featured system solutions to simple clock building-block devices. Factory-programmable options and clock solution customization capabilities address unique customer requirements, while the lowest jitter and lowest power features set IDT apart from the competition. Products are accompanied by a world-class support team driven by service and responsiveness goals. IDT has also expanded its portfolio to include frequency control products, such as the XpressO® oscillators from Fox Electronics and an innovative line of MEMS oscillators that are rapidly replacing legacy quartz-based oscillators. For more information about IDT's leading portfolio of timing products, please visit

About IDT

Integrated Device Technology, Inc., the Analog and Digital Company™, develops system-level solutions that optimize its customers' applications. IDT uses its market leadership in timing, serial switching and interfaces, and adds analog and system expertise to provide complete application-optimized, mixed-signal solutions for the communications, computing and consumer segments. Headquartered in San Jose, Calif., IDT has design, manufacturing, sales facilities and distribution partners throughout the world, with direct purchase services through IDT Direct™. IDT stock is traded on the NASDAQ Global Select Stock Market® under the symbol "IDTI." Additional information about IDT is accessible at Follow IDT on Facebook, LinkedIn, Twitter, and YouTube.

IDT and the IDT logo are trademarks or registered trademarks of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners.

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Integrated Device Technology, Inc.
Sue Kim, 408-284-2739
IDT Corporate Marketing

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