Frequency translators for 100G Ethernet from IDT
IDT is sampling the third generation of its Universal Frequency Translator (UFT) family of timing devices for high-performance optical networks, wireless base stations, and 100 Gigabit Ethernet (GbE) interface applications.
The devices are the industry’s only single-chip programmable solutions capable of generating eight different output frequencies with less than 300 femtoseconds RMS phase jitter over the standard 12 kHz to 20 MHz integration range.
IDT UFTs offer eight independently-programmable clocking outputs with the flexibility to apply virtually any input frequency and select virtually any output frequency. The devices’ high level of integration and low jitter eliminates the need for separate frequency translation, redundancy management, and jitter attenuation devices – empowering system designers to save cost and board area by consolidating those functions into a single device.
“100 GbE applications require robust timing devices to ensure reliable system operation with low bit error rates (BER). With RMS phase jitter of only 300 femtoseconds, IDT’s UFT family not only meets the technical requirements as a compact single-chip solution, but offers a multitude of additional benefits in flexibility and programmability that make it far superior to fixed-frequency discrete solutions,” says IDT’s Christian Kermarec
The devices are available with one or two PLLs in a single package, depending on the needs of the application. When configured as a frequency synthesizer the device can utilize a low-cost, readily-available 10 MHz to 40 MHz crystal to produce any frequency from 8 kHz to 1.0 GHz, regardless of the crystal frequency used.
In a frequency translator configuration, the devices accept up to four input reference clocks per PLL from 8 kHz to 875 MHz, switching between them as necessary to generate any output frequency from 8 kHz to 1.0 GHz. Each output is individually programmable as LVPECL, LVDS, or as a pair of LVCMOS signals.
IDT’s Timing Commander GUI programmes the devices to meet system requirements without sifting through register tables in the datasheet.