Programmable clock generator has phase jitter under 0.7psec

March 17, 2014 // By Julien Happich
Integrated Device Technology has added the 5P49V5901 to its VersaClock 5 family of programmable clock generators, offering four universal output pairs capable of producing independent frequencies up to 350 MHz in various output types.

The in-system programmable device consolidates four differential or eight single-ended clock generators, and can store up to four different configuration settings, helping to minimise board space and bill-of-materials. With RMS phase jitter less than 0.7 psec over the full 12 kHz to 20 MHz integration range, the new device meets the stringent jitter requirements of PCI Express Gen 1/2/3, USB 3.0, and 1G/10G Ethernet. The high-performance clock generator operates at less than 100 mW core power (50% lower than competing devices), helping to ease system thermal constraints, reduce operating power expenses, and maximise battery life.

The 5P49V5901’s four universal output pairs are each independently configurable as HCSL, LVPECL, LVDS, or dual LVCMOS outputs. The fractional output dividers driving each output pair are programmed via I 2C while the device is operating in the system, lending itself to system tuning and margin testing. Unlimited in-system reprogramming is possible via I 2C, whereas four banks of one-time programmable non-volatile memory provide flexibility for multi-project inventory consolidation or design changes in field or production units. Devices may be factory-programmed to the customer’s desired configuration. The device is available in a 24-lead 4x4mm VFQFPN package.

Integrated Device Technology; www.IDT.com