Mouser Electronics, Inc. has Silicon Labs' Si522xx PCIe clock generators available.This new family of clock generators complies with all current PCI Express® (PCIe®) standards, including PCIe Gen 4 and SRIS (Separate Reference Independent Spread) standards, delivering exceptional jitter performance of only 0.4 picoseconds RMS. Wide range of applications for this family includes servers, storage, network interface cards, data centers, digital cameras, and docking stations.
Silicon Labs' Si522xx PCIe clock generators utilize low-power push-pull output memory technology to limit power consumption, reduce package size, and eliminate the need for external termination resistors on HCSL (High Speed Current Steering Logic) outputs. Internal power filtering of the devices reduces the number of components, saving approximately 30 percent of board space compared to similar products.
The Si52212, Si52208, and Si52204 devices can supply twelve, eight, and four 100 MHz PCIe differential clock outputs, respectively, plus one 25 MHz LVCMOS reference clock output, while the Si52202 can only supply two 100 MHz PCIe clock outputs. All Si522xx devices feature individual hardware control pins to enable and disable each output, turn spread spectrum on/off for EMI reduction, and select the frequency for either 133 MHz or 200 MHz differential output frequencies. These features can also be controlled via I2C.
The Si522xx clock generators are compatible with Silicon Labs' Si52204-EVB evaluation board, which allows engineers to evaluate the four-output Si52204 clock generator. The board provides access to the I2C port, as well as jumpers and SMA connectors for easy static configuration of the control inputs and selector switches to determine the voltage for both the I/O and core supplies.
