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Timing ICs enable SyncE transmission over OTNs

Posted: 02 Feb 2012     Print Version  Bookmark and Share

Keywords:Synchronous Ethernet  SyncE  optical transport network  OTN  clock 

Microsemi Corp. launches two single-chip, standards-compliant Synchronous Ethernet (SyncE) solutions that allow the transmission of SyncE over optical transport network (OTN) channels without the need for rate conversion phased locked loops (PLLs). The ZL30153 and ZL30154 timing devices support Ethernet clock rates and all OTN clock rates.

By using these devices for both SyncE and OTN applications, telecom equipment can support multiple services over a single network at lower timing solutions costs.

The ZL30153 and ZL30154 SyncE timing devices support flexible input and output rates and are fully compliant to SyncE standards. Then company's previous generation SyncE solutions and other similar available solutions only support telecom and Ethernet clock rates. The programmable digital PLLs in both devices synchronise to any clock rate from 1Hz to 750MHz. This lets the one pulse per second (PPS) GPS signal be used directly as an input reference. Also, the programmable synthesisers generate any clock rate from 1Hz to 750MHz.

The ZL30154 timing card device provides two independent digital PLLs for applications that require independent transmit and receive timing paths, while the ZL30153 device uses a single digital PLL for clock synchronisation. The new devices require only an inexpensive temperature controlled crystal oscillator (TCXO) to achieve full compliance with ITU-T Recommendation G.8262.

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