Network timing PLL for Ethernet and SONET/SDH line cards
The 82P33731ABAG8 is a PLL-based network timing IC from Renesas, designed for Ethernet, SONET/SDH, and Stratum applications. It accepts CMOS, LVDS, or PECL inputs and delivers the same output types, with a 14:14 input-to-output ratio and differential signaling on both sides. With a maximum output frequency of 650 MHz, it handles the high-speed clock distribution needed in 10G/100G line cards, base station timing modules, and network synchronisation subsystems. The industrial temperature range (−40°C to 85°C) suits outdoor or uncontrolled telecom enclosures.
Supply range and package — board-level integration
The 144-ball CABGA (13×13 mm) package requires a multi-layer PCB with controlled impedance traces for the differential clock lines. Two independent PLL circuits are integrated, allowing separate clock domains for different line rates or redundancy schemes. The 14:14 I/O ratio provides dense fanout without external clock buffers.