OTN clock translator offers notable jitter performance

Microsemi Corp. has rolled out the ZL30169 high performance optical transport network (OTN) clock translator that claims to deliver significant interoperability and adequate network performance. The ITU-T G.8251-compliant, three-input, three-output "any-rate-to-any-port" clock translator affords output clocks with 250fs RMS jitter performance that is suitable for 100G coherent optical networks, noted the company.

The ZL30169 integrates a digital phase locked loop (DPLL), analogue PLL (APLL) and EEPROM into a 5 x 5mm 32-pin QFN package. The APLL generates the ultralow jitter output clocks programmable to any frequency from 1Hz to 1035MHz, the first device of its kind offering such a wide range, stated Microsemi. With programmable loop bandwidth from 14Hz to 500Hz, the DPLL accepts any input frequency from 1kHz to 1250MHz and provides hitless reference switching, holdover and jitter filtering.

The EEPROM provides automatic self-configuration of the device at start-up. The ZL30169 has the critical features such as dynamic rate conversion for forward error correction used in OTN transport and switching applications. The device also meets all the jitter and wander requirements that are specified in the ITU-T G.8251 standard.

The ZL30169 also offers numerically controlled oscillator (NCO) mode in which output frequencies can be controlled with very high resolution (better than 0.01ppb) by system software. This capability provides a cost-effective solution for customers designing their own mapper with FPGAs to replace large, expensive, fixed-frequency voltage-controlled oscillators (VCXOs), added Microsemi.

The ZL30169 device supports multiple client rates such as GE, 10GE, SONET/SDH, SyncE, Fibre Channel, CPRI and digital video transmission.

The evaluation software generates configuration scripts to be stored in internal EEPROM or to be run on a system processor. The ZL30169 is available.