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Ethernet, IEEE 1588 timing devices target industrial apps

06 May 2014

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8V89316 and 8V89317

Integrated Device Technology Inc. (IDT) unveiled the industry's first Ethernet and IEEE 1588 timing devices optimised to meet the performance, functionality, and cost targets of smart grid and industrial automation applications. The low-jitter timing products improve the accuracy and reliability of IEEE 1588 time transport and offer important flexibility with an integrated Ethernet digital PLL (DPLL) and digitally controlled oscillator(DCO) in a single chip.

The 8V89316 and 8V89317 are low-jitter Ethernet PLLs used to frequency synchronise switches and routers via the Ethernet physical layer to improve the reliability and time 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 1GbE interfaces, while the 8V89317 is suitable for 10GbE interfaces and adds the ability to lock to 1PPS (pulse per second) GPS clocks.

Both devices include DCOs for increased flexibility, allowing them to lock to an incoming Ethernet clock or synthesise their own IEEE 1588-based clocks that other devices in the system can use as a frequency reference.

The 8V89317 can lock to a 1PPS frequency reference from a GPS receiver, allowing use as part of a local network master clock without the need for wire- or fibre-based access to a synchronisation source. GPS timing improves flexibility of the physical location of a clock and reduces installation costs for 'timing islands' by eliminating the need to extend a timing network to every location.

The 8V89316 achieves phase jitter below 650fs RMS over the 10kHz to 20MHz integration range, making it appropriate for 1G Ethernet PHYs and QSGMII (Quad Serial Gigabit Media Independent Interface). The 8V89317 phase jitter is below 300fs RMS over the 10kHz to 20MHz integration range, capable of meeting the most stringent 10G or 40G Ethernet PHYjitter performance requirements.

The IDT 8V89316 and 8V89317 are currently sampling to qualified customers and are encapsulated in a 196-ball 15mm x 15mm CABGA package. The IDT 8V89316 and 8V89317 are priced at $9.46 and $18.30 each for volumes of 1,000 units, respectively.




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