Clock Distribution Devices offer HCSL outputs.

Press Release Summary:

ECLinPS(TM) NB4N121K and NB4N111K feature differential Host Clock Signaling Level (HCSL) outputs and ultra low propagation delay variation for FBDIMM frequencies of 100/133/166/200/266/333/400 MHz. While NB4N121K is 1:21 or 1:42 HCSL clock distribution device, NB4N111K is 1:10 HCSL clock distribution device. Both 3.3 V devices produce additive phase jitter of 0.3 ps and are designed for synchronization of memory modules found in computing, data storage, and networking applications.

Original Press Release:

ON Semiconductor's New ECLinPS(TM) Clock Distribution Devices offer HCSL Outputs for Computing, Data Storage, Networking and Consumer Applications

Best-in-class devices deliver sub-picosecond jitter quality clocks, improve timing accuracy, increase design flexibility and reduce overall system cost

PHOENIX, Ariz. - Aug. 8, 2007 - ON Semiconductor (Nasdaq: ONNN), a global leader in power semiconductor solutions, today announced the expansion of its high performance ECLinPSTM clock management portfolio with the introduction of two new clock distribution devices for synchronization of memory modules found in today's most advanced computing, data storage, networking consumer applications. The new NB4N121K and NB4N111K feature differential Host Clock Signaling Level (HCSL) outputs and ultra low propagation delay variation for Fully Buffered Dual Inline Memory Module (FBDIMM) applications.

"Within the industry, the design of memory subsystems is transitioning from a parallel to a serial address-and-data architecture as system speed and capacity requirements continue to increase," said Dan Huettl, director of ON Semiconductor's Standard Products Advanced Logic Division. "Building upon our EClinPSTM leadership in low jitter differential signaling, we have created HCSL FBDIMM clock distribution products with the industry's lowest jitter, lowest skew and the widest fanout available. We will continue to expand both our ECLinPS(TM) clock distribution and PureEdge(TM) clock generation portfolios aimed at providing timing solutions for the entire clock tree. In this way, ON Semiconductor will continue to build upon its reputation as a key player in the market space."

The Devices

The new NB4N121K and NB4N111K are 3.3 volt (V) clock distribution devices with differential HCSL outputs targeted for typical FBDIMM frequencies of 100 MHz, 133 MHz, 166 MHz, 200 MHz, 266 MHz, 333 MHz and 400 MHz. Employing advanced 0.25 micron (um) CMOS technology, they significantly outperform competitive devices - producing additive phase jitter of only 0.3 picoseconds (ps) and output-to-output skew < 100 ps. (Delta tpd 100 ps Maximum Propagation Delay Variation per each Differential Pair.) Competitive devices perform at typically >1 ps jitter with skews well above 100 ps. As such, ON Semiconductor's newest ECLinPS(TM) devices free up more of the system designer's precious timing budget.

The optimal design, layout and processing of ON Semiconductor's new clock distribution devices minimize within device skew and skew from device to device. System designers can take advantage of this superior performance to distribute low skew, low jitter clocks to their memory controllers and FBDIMM modules. Clock inputs for both devices incorporate internal 50 ohm on die termination to reduce component count and simplify board layout.

The NB4N121K is a 1:21 or 1:42 HCSL clock distribution device. At 1:21, the device provides the industry's widest fanout, and can be configured in 2X mode to provide a 1:42 HCSL fanout. The device accepts differential LVPECL, CML, or LVDS levels as well as single-ended LVPECL, CML, LVCMOS or LVTTL with the proper VREFAC supply. Output drive current at IREF (Pin 1) for 1X load is selected by connecting to GND. Configuring to 2X mode is easily accomplished by connecting IREF to VCC.

The NB4N111K is a 1:10 HCSL clock distribution device. It also accepts differential LVPECL, CML, or LVDS input levels as well as single-ended LVPECL, CML, LVCMOS, or LVTTL by properly setting the VREFAC supply.

"As the industry reacts to uncertainties created by clock and timing supplier consolidations and business divestitures, ON Semiconductor has continued to provide customers with competitively priced timing solutions that deliver products of the highest performance and best quality." said Prescott Sakai, ON Semiconductor marketing manager for Advanced Logic. "The company's reputation for solid delivery, superior customer service, and consistent financial performance serves to further strengthen the confidence of our customers. During the coming year, we plan to introduce additional products that target the demanding technological needs and unique industry challenges of the marketplace."

Packaging and Pricing

Packaged for the NB4N121K is in a RoHs, 52pin, exposed pad QFN priced at $4.00 in quantities of 1,000. The NB4N111K is packaged in a RoHs 32 pin, exposed pad QFN priced at $3.75 in quantities of 1,000.

For more information, visit or contact Joe Staszkow at

About ON Semiconductor

With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of power solutions to engineers, purchasing professionals, distributors and contract manufacturers in the power supply, computer, consumer, portable/wireless, automotive and industrial markets. For more information, please visit ON Semiconductor's website at

ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.


Anne Spitza
Marketing Communications
ON Semiconductor
(602) 244-6398

Heather Gaynor
Dix & Eaton

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