Semtech Adds Jitter Attenuating and Clock Multiplying IC to SETS Product LineNew ACS8942A generates subpicosecond jitter output clock for SONET/SDH networks Camarillo, California - April 12, 2005 Semtech Corp. (NASDAQ: SMTC), a leading supplier of analog and mixed-signal semiconductors for communications, portable devices, computers, and industrial equipment, today announced the ACS8942A, a jitter attenuating and multiplying (JAM) phase-locked loop (PLL) for generating ultra-low jitter output clocks for SONET and SDH network equipment.
With a tiny 5mm x 5mm QFN 32-pin package, the device can be used to attenuate jitter in the network element at the point-of-use. The ACS8942A features a unique integrated voltage controlled oscillator, which saves cost and board space; it also eliminates long-term center frequency drift and the potential for mechanical failure of an external oscillator. “The ACS8942A offers a significant advantage to the designer who is finding that jitter is impacting a high-speed design,” stated Stewart Kelly, director of the Advanced Communications Products Division at Semtech. “With this device in our successful SETS product portfolio, Semtech has become the first one-stop shop to fulfill all SONET/SDH network element, standards-compliant clocking requirements.” The device nominally inputs a 155.52 MHz reference clock via a single, differential LVPECL input and can be configured to provide either 622.08 MHz or 77.76 MHz on a single, differential CML output. The IC features an external feedback-operating mode that allows it to input other common SONET/SDH spot frequencies (19.44, 38.88, 77.76 MHz), and allows the final output signal from any external buffers and dividers to be in exact phase alignment with the clock input. Key Features of the ACS8942A
Pricing and AvailabilityEngineering samples of the ACS8942A are available now from Semtech’s authorized network of sales representatives and distributors. Requests for datasheets, evaluation boards, samples and pricing may be directed to salesinfo@semtech.com or requested from the Company's website at www.semtech.com. Please reference the following part numbers when contacting us:
About SemtechSemtech Corporation is a leading supplier of high-quality analog and mixed-signal semiconductor products. The company is dedicated to providing customers with proprietary solutions and breakthrough technology in power management, protection, advanced communications, human interface, and test & measurement products. Publicly traded since 1967, Semtech is listed on the NASDAQ National Market under the symbol SMTC. For more information, contact Semtech Corp. at 200 Flynn Road, Camarillo, CA 93012-8790; phone (805) 498-2111; email to info@semtech.com; or visit its web site at www.semtech.com. Press ContactTerry Sears, Marketing Communications Manager, Telephone: 805.498.2111 |
The ACS8942A is the latest addition to Semtech’s synchronous equipment timing source (SETS) product family. The IC features jitter generation as low as 0.10 picosecond (ps) RMS (G.813, STM-16, 1 MHz to 20 MHz band) and 0.93 ps RMS (GR-253, OC-48, 12 kHz to 20 MHz band), well below the jitter requirements of ITU-T and Telcordia specifications for up to OC-48/STM-16 systems. The device dejitters the output of a line card protection device or line card clock synthesizer, providing a clock-cleaning solution for DSL access multiplexers and metropolitan or edge networking equipment with very tight jitter budgets.
