Microsemi has introduced its first standards-compliant Synchronous Ethernet (SyncE) timing chip for transmission over optical network channels without the need for additional rate conversion phased locked loops (PLLs).
The ZL30153 and ZL30154 timing devices support Ethernet clock rates and all OTN clock rates. As a result systems can support multiple services over a single network.
The timing devices support flexible input and output rates and are fully compliant to SyncE standards. The programmable digital PLLs in both devices synchronise to any clock rate from 1Hz to 750MHz.
"This allows the one pulse per second (PPS) global positioning system (GPS) signal to be used directly as an input reference. In addition, the programmable synthesizers generate any clock rate from 1Hz to 750MHz," said the supplier.
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.
Microsemi said the devices require only an inexpensive temperature controlled crystal oscillator (TCXO) to achieve full compliance with ITU-T Recommendation G.8262.
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