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Description

The Si5326 is a jitter-attenuating precision clock multiplier for applications requiring sub 1 ps jitter performance. The Si5326 accepts two input clocks ranging from 2 kHz to 710 MHz and generates two output clocks ranging from 2 kHz to 945 MHz and select frequencies to 1.4 GHz. The two outputs are divided down separately from a common source. The Si5326 can also use its crystal oscillator as a clock source for frequency synthesis. The device provides virtually any frequency translation combination across this operating range. The Si5326 input clock frequency and clock multiplication ratio are programmable through an I2C or SPI interface.

Features

? Generates any frequency from 2 kHz to 945 MHz and select frequencies to 1.4 GHz from an input frequency of 2 kHz to 710 MHz

? Ultra-low jitter clock outputs with jitter generation as low as 0.3 ps rms(50 kHz–80 MHz)

? Integrated loop filter with selectable loop bandwidth (60 Hz to 8.4 kHz)

? Meets OC-192 GR-253-CORE jitter specifications

? Dual clock inputs with manual or automatically controlled hitless switching (LVPECL, LVDS, CML, CMOS)

? Dual clock outputs with selectable signal format

? Support for ITU G.709 and custom FEC ratios (255/238, 255/237, 255/236)

? LOL, LOS, FOS alarm outputs

? Digitally-controlled output phase adjustment

? I2C or SPI programmable

? On-chip voltage regulator for 1.8 ±5, 2.5 ±10, or 3.3 V ±10 operation

? Small size: 6 x 6 mm 36-lead QFN

? Pb-free, ROHS compliant

Applications

? SONET/SDH OC-48/OC-192/STM-16/STM-64 line cards

? ITU G.709 and custom FEC line cards

? GbE/10GbE, 1/2/4/8/10G Fibre Channel line cards

? GbE/10GbE Synchronous Ethernet

? Optical modules

? Wireless basestations

? Data converter clocking

? xDSL

? PDH clock synthesis

? Test and measurement

? Broadcast video