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IDT uncloaks IEEE 1588 time, frequency generators

Posted: 02 Oct 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Integrated Device Technology? frequency generator? IEEE 1588? synchroniser? SyncE?

Integrated Device Technology Inc. (IDT) has rolled out a line-up of IEEE 1588 time and frequency generator chips geared to cut costs while meeting the synchronisation needs of LTE-Advanced, wireless backhaul and heterogeneous networks. According to the company, the devices enable IEEE 1588 software designers to implement their own clock recovery algorithms and add value for their customers through customisation and quick turnaround support.

The time and frequency generators include synchronisation management devices (SMDs) and port synchronisers for IEEE 1588 and synchronous Ethernet (SyncE). The SMDs manage IEEE 1588 time and frequency generation and SyncE synchronisation. The port synchronisers select between redundant SMD signals and provide accurate time and low-jitter clocks to the network ports in the system, detailed IDT.

The IDT 82P33810, 82P33814 and 82P33831 SMDs reduce the cost of IEEE 1588 clocks by replacing stable but expensive oven-controlled crystal oscillators (OCXOs) with low-cost temperature-compensated crystal oscillators (TCXOs) that are stabilised with frequency information from the SyncE physical layer. The process of stabilising the TCXOs is automatic and transparent to the IEEE 1588 clock recovery software.

IEEE 1588 time, frequency generators

The IDT 82P33724 and 82P33741 port synchronisers provide independent timing channels for IEEE 1588 and SyncE; a third independent timing channel is provided for general purpose rate conversion. Hitless reference switching is supported between redundant IEEE 1588 references and between redundant SyncE references. These devices manage IEEE 1588 time and frequency references by accepting clocks paired with one pulse per second (1PPS) sync signals.

The devices are available with 1K pricing for SMDs starting at $30 and port synchronisers at $12.

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