SEPTEMBER 5, 2007 — Sunnyvale, CA-based Maxim Integrated Products launched the DS3104 telecom timing component, suited to next-generation timing applications in SynchE and other line cards and subsystems. It supports SONET/SDH, PDH, and wireless systems.
The IC provides full carrier-class clock synchronization support for SynchE and mixed SONET/SDH/SynchE line cards. It uses Maxim's DSP-based digital PLL (DPLL) technology and supports up to eight input and seven output clocks with two independent DPLLs for bidirectional frequency conversions. Built-in reference-selection logic automatically selects highest priority, valid input clocks for each DPLL.
The main DPLL takes system clocks from dual redundant timing cards, monitors both, selects which to lock, and synthesizes various clocks on the line card. It also provides hitless switching and holdover capabilities. The second DPLL converts recovered line clocks. Each DPLL is followed by a clock-multiplying, jitter-attenuating APLL and dividers for an array of clock rates.
Suited for ADMs, digital cross-connects, carrier-class switches and routers, wireless base stations, and other telecom equipment, the DS3104 is available in an 81-lead 10- × 10-mm BGA, in 5/6 or fully RoHS-compliant materials. It operates from -40° to +85°C. Flexible clock I/O capabilities enable most telecom, Ethernet MII, base-station, and GPS clock rates.