Oscillators minimize jitter for cost-sensitive apps up to 250 Mz

Oscillators minimize jitter for cost-sensitive apps up to 250 Mz

The Si510/1/2/3/4 XO/VCXO family includes the industry’s first I2 C-programmable (‘14), low-jitter XOs, and the first dual-frequency XO/VCXOs (‘12/3) in space-saving 3.2 x 5-mm packages. Featuring 0.8-ps rms jitter across the entire frequency range, all parts provide up to 2.5X lower jitter than traditional factory-programmable oscillators.

The family offers drop-in compatibility with fixed-frequency XOs and surface-acoustic-wave (SAW) oscillators, while providing frequency flexibility and power supply noise rejection. The XO/VCXOs support voltage options of 1.8, 2.5, and 3.3 V and LVPECL, LVDS, CMOS, and HCSL output formats. All devices include on-chip voltage regulation, minimizing the impact of system-level power supply noise on clock jitter.

In addition, the XO/VCXOs feature the company’s patented DSPLL technology to generate any frequency from 100 kHz to 250 MHz with 26-parts-per-trillion frequency-programming resolution. Unlike traditional crystal and SAW oscillators that require a unique crystal or SAW resonator for each frequency, the Si51x devices pair a DSPLL clock IC with a single low-frequency crystal.

The Si512/3 dual-frequency XOs are ideally suited for replacing two discrete XOs and a multiplexer in networking, broadcast video and other applications that use multi-rate SerDes devices and FPGAs. The Si510/1 are single-frequency XOs. The Si514 I2 C-programmable XO can be used to replace clock generators that require an external crystal for local clock generation. The Si514 is a flexible choice for prototyping since it can be reprogrammed in-system to any frequency. (Ea/10,000: Si510/1, from $2.10 to $3.69; Si514, $2.71 to $10.23; Si5XX-PROG-EVB development kit, $125; Si5XX-EVB, $45 each — available now.)

By Christina Nickolas

Silicon Laboratories , Austin , TX
Dale Weisman 512-532-5871

www.silabs.com