Semtech Sampling First Commercially Available, Single Chip Stratum 3E Compliant SETS IC for SONET/SDH Network Synchronization.Business Editors & High-Tech Writers CAMARILLO, Calif.--(BUSINESS WIRE)--May 20, 2002 New ACS (Asynchronous Communications Server) See network access server. 8530 is latest offering in a product line that continues to revolutionize clock synchronization Clock synchronization is a problem from computer science and engineering which deals with the idea that internal clocks of several computers may differ. Even when initially set accurately, real clocks will differ after some amount of time due to clock drift, caused by clocks for SONET/SDH applications Semtech Corp. (Nasdaq:SMTC SMTC Southern Maine Technical College SMTC Science/Mathematics/Technology Center (Central Michigan University) SMTC Saluda Mountain Telephone Company (Knoxville, Tennessee) SMTC Short-To-Medium Term Control ), a leading supplier of analog and mixed-signal semiconductors for communications, portable devices, computers, and industrial equipment, today announced the newest addition to its Synchronous Equipment Timing Source (SETS) family of products, the ACS8530, a highly integrated single-chip solution for the SETS function in a SONET or SDH (Synchronous Digital Hierarchy) The European counterpart to SONET. See SONET. SDH - Synchronous Digital Hierarchy network. This chip is the first commercially available device to meet or exceed the stringent requirements for Stratum 3E clocks, including all the requirements of Telcordia 1244-CORE, GR-253, ITU-T See ITU. ITU-T - International Telecommunications Union G.812 Type III Type III may stand for:
The ACS8530 SETS IC includes four analog and two digital PLLs (phase-locked loops Phase-locked loops Electronic circuits for locking an oscillator in phase with an arbitrary input signal. A phase-locked loop (PLL) is used in two fundamentally different ways: (1) as a demodulator, where it is employed to follow (and demodulate) frequency or ) for optimal performance and supports simultaneous multiple output clocks with a choice of 55 frequencies, including OC3, E1, DS1, E3, and DS3. In addition, the new device accepts 14 individual reference clocks and generates nine output clocks and two sync pulse outputs. All inputs have robust activity and frequency monitoring. "The ACS8530 employs a patent-pending phase detector A phase detector is a frequency mixer or analog multiplier circuit that generates a voltage signal which represents the difference in phase between two signal inputs. It is an essential element of the phase-locked loop (PLL). technique which enables direct phase locking," stated Stewart Kelly, Director of the Advanced Communications Division at Semtech. "This technique produces the best MTIE MTIE Maximum Time Interval Error and TDEV TDEV Time Deviation figures in the industry, thereby ensuring low bit-error rates in networks utilizing equipment which incorporate Semtech's unique synchronization architecture." The ACS8530 also provides exceptional frequency accuracy. When an input source fails, the IC can hold the last known frequency with an accuracy of up to 0.0000012 ppm. This "holdover hold·o·ver n. One that is held over from an earlier time: a political advisor who was a holdover from the Reagan era; a family tradition that is a holdover from my grandparents' childhood. Noun 1. " accuracy is the best in the industry due to the high internal resolution of up to 54 bits. A notable ease-of-use aspect of the ACS8530 SETS IC is its programmable phase alignment. In a typical rack system comprising clock cards and line cards, serious attention must be given to ensure that all card and backplane delays are symmetrical across the entire clocking backplane. The ACS8530 incorporates a register that can be programmed with 6 ps accuracy across a 200 ns window to align the master and slave clocks. This feature allows an engineer to place clock cards anywhere within the rack system and guarantee alignment of the clocks feeding the line cards. Additional application flexibility and utility is designed into the ASC ASC Ambulatory surgery center, see there 8530 through the large number of clock I/Os supported by the device. This permits the customer to develop one sync card to fit a multitude of applications, including, but not limited to: ADMs, switches, cross-connects, core routers, and DSLAMS as well as retrofit upgrades of sync cards in existing clocking systems. The ACS8530 is pin compatible with the current generation of devices for Stratum 3, so a transition to new technologies incorporating higher levels of 3E synchronization only requires additional software development, not an entirely new board layout, thus reducing development cost and time to market. Key Features of the ACS8530 -- Suitable for Stratum 3E, 3, 4E and 4 SONET/SDH Equipment Clock (SEC) application -- Holdover accuracy of 0.0000012 ppm -- Accepts 14 individual input reference clocks, all with robust input clock source quality monitoring -- Simultaneously generates nine output clocks, plus two sync pulse outputs -- Programmable wander and jitter tracking/attenuation 0.5 mHz to 70 Hz in 18 steps -- Absorbs phase disturbances due to source switching, mode changes or input phase jumps Pricing and Availability Sample quantities of the ACS8530 are available now from Semtech's authorized network of sales representatives and distributors. Datasheets, evaluation boards, samples and pricing may be requested from Semtech's Advanced Communications Products Division at sales@semtech.com or from the Company's website at www.semtech.com. Please reference the following part numbers when contacting us: Evaluation Board: ACS8530EVB Samples: ACS8530 About Semtech Semtech Corporation is a leading supplier of high-quality analog and mixed-signal ICs for power management, over-voltage and transient protection, human interface devices & system management, high-performance applications, and advanced communications. 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. |
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