Fremont, Calif. Exar Corp. kicked off a new family of zero delay buffers with two devices that tout low-skew and low-noise capabilities at 3.3 V.
The XRK32510 and XRK39910 are said to be cost-effective zero delay buffers (ZDBs) for a wide range of applications spanning from consumer and industrial to networking and computing.
"This marks Exar's fourth clock and timing introduction and reaffirms Exar's focus on not only this market but the company's ongoing commitment to delivering customers a wide range of device options," said Bahram Ghaderi, vice president and general manager, network and transmission products division. "Leveraging our extensive analog and phase-locked loop (PLL) design expertise, we have extended this product line to include more features and functionality for customers' clock distribution needs."
Exar previously introduced intelligent dynamic clock switch (IDCS) devices and a portfolio of 3.3-V programmable skew buffers (PSBs).
Click here for more details on Exar's IDCS devices at eeProductCenter.
Operating at speeds up to 175 MHz, the ZDB clock drivers are designed for use with synchronous dynamic random access memory modules found in computing systems, plus telecommunications and networking applications. The devices accurately align the feedback output to the clock input signal ensuring a zero delay through the IC. Each device distributes one clock input to a bank of ten outputs, resulting in low-skew, low-jitter copies of each clock, Ghaderi said. "The family offers tight peak-to-peak jitter spec at less than 75 picoseconds to ensure the production of stable and clean signals," he said.
The XRK39910 is a fanout PLL clock driver intended for high performance computing and data-communications applications. The internal loop filter is tuned to minimize the jitter (or frequency variation), while still providing accurate responses to input frequency changes. The XRK39910 offers eight zero delay outputs with less than 250 ps of output-to-output skew, selectable positive or negative edge synchronization, output frequency of 15 MHz to 85 MHz, and low jitter of less than 200 ps peak-to peak.
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The XRK32510 is available now in a 24-pin TSSOP for $2.20 each in 10,000-unit quantities. Click here for the XRK32510 data sheet. The XRK39910, which sells for $1.95 in like quantities, will be available in a month in a 24-pin SOIC package.
Click here for the XRK39910 data sheet.
Exar, 1-510-668-7000, www.Exar.com.