Clock generator covers wide bands

Low-phase-noise clock generator claims best-in-class jitter performance at 380fs (RMS at 10kHz to 20MHz).

Texas Instruments has introduced a low-phase-noise clock generator that provides best-in-class jitter performance at 380fs (RMS at 10kHz to 20MHz).

The device incorporates crystal oscillator (XO) circuitry with a fully integrated frequency synthesiser supporting a wide output frequency range from 10.9 to 766.7MHz and from 875.2 to 1175MHz, easing design for customers designing Ethernet, Fibre Channel, PCI Express and Serial ATA products.

The CDCE421 is available in either its die form to fit in a 5 x 7mm XO package or a 24-pin quad flat no-lead (QFN) package, giving customers flexibility to fit their designs.

The new clock device is the first to integrate both on-chip EEPROM and XO circuitry for increased programmability, further simplifying the design by allowing the customer to implement a single device for various frequencies.

All device settings are programmable through a TI proprietary simple serial interface for programming after manufacturing.

The device operates in a single 3.3V supply environment and is characterised for operation in the industrial temperature range from -40C to +85C.

The CDCE421 is available now in either a die form or packaged in a 24-pin QFN package and is priced at US $7.00 in 1000-piece quantities.

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