The new low-jitter synchronization products improve the accuracy and reliability of IEEE 1588 timing and offer greater flexibility with an integrated Ethernet digital PLL (DPLL) and a digitally controlled oscillator (DCO) on a single chip.
 
The 8V89316 and 8V89317 are Ethernet PLLs used to frequency synchronize switches and routers across the Ethernet physical layer to improve the reliability and accuracy of IEEE 1588-based transparent clocks, boundary clocks, and ordinary clocks. The 8V89316 generates clocks suitable for QSGMII (Quad Serial Gigabit Media Independent Interface) and GbE interfaces, while the ultra-low-jitter 8V89317 is suitable for 10 GbE interfaces and adds the ability to lock to 1 PPS (pulse per second) GPS clocks. Both devices include DCOs for greater flexibility, allowing them to lock an incoming Ethernet clock or synthesize their own IEEE 1588-based clocks, which other devices in the system can use as a frequency reference.
 
“IDT’s latest Ethernet PLLs lead the market with their combination of performance, features, and cost-effectiveness, making it easy to use physical layer Ethernet clocks in smart grid and industrial applications,” said Louise Gaulin, vice president and general manager of IDT’s Communications Networking division. “In addition to best-in-class jitter performance, our combined DPLL and DCO capability offer the flexibility to connect an existing electrical timing input, or when that’s not possible, to generate a new one based on the IEEE 1588 standard. Leading equipment manufacturers are demanding these levels of performance and functionality, as they have been identified as critical factors in time-sensitive applications, such as automation in power substations.”
 
The 8V89317 can lock to a 1PPS frequency reference from a GPS receiver, enabling its use as part of a local network master clock without requiring wired or fiber access to a synchronization source. GPS synchronization improves the physical location flexibility of a clock and reduces installation costs for "synchronization islands" by eliminating the need to expand a timing network to each location.
 
The 8V89316 achieves phase jitter below 650 femtoseconds RMS over an integration range of 10 kHz to 20 MHz, making it suitable for 1G Ethernet PHYs and QSGMII (Quad Serial Gigabit Media Independent Interface). The 8V89317 phase jitter is below 300 femtoseconds RMS over the 10 kHz to 20 MHz integration range, capable of meeting the most demanding 10G or 40G Ethernet PHY jitter performance requirements.
 
Pricing and Availability:
Samples of the IDT 8V89316 and 8V89317 are now shipping to qualified customers and are packaged in 196-ball 15 x 15 mm CABGA. The IDT 8V89316 and 8V89317 are priced at $9.46 and $18.30 each for 1,000-unit volumes, respectively. For more information on IDT's rich WAN PLL synchronization portfolio, visit idt.com/go/NetSync.

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