SI53108-A01AGMR

Overview

The Si53108-A01AGMR is a low-power, 8-output differential clock buffer designed to meet Intel DB800ZL specifications. It supports 100 MHz and 133 MHz operation via an optimized VCO for PCIe Gen 1/2/3/4, QPI, SAS, SATA, and Intel SMI applications. The device features eight 0.7 V push-pull HCSL-compatible outputs with individual hardware OE pins. It operates on a 1.05 to 3.3 V supply, includes SMBus control (address 0xD8), and functions in PLL or bypass modes while tolerating spread spectrum signals.

Feature Summary

• Eight 0.7 V low-power, push-pull, HCSL-compatible PCIe Gen 3 outputs
• Individual hardware OE pins for each output clock
• 100 MHz / 133 MHz PLL operation supporting PCIe and QPI
• SMBus address is 0xD8

Applications

• Server
• Storage
• Datacenter
• Enterprise Switches and Routers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Ensure compatibility with system power supply voltages and SMBus addressing requirements before integration.

Selection Notes

Select this component for designs requiring zero-delay buffering for high-speed serial interfaces like PCIe Gen 4 and Intel QPI. Confirm that the input frequency matches the desired output frequency, as the device operates in a 1:1 mode only. Check thermal requirements for the 48-pin QFN package in industrial environments.

Part Context

This part belongs to Skyworks Solutions' family of differential clock buffers. It is specifically engineered to distribute reference clocks for Intel Quick-Path Interconnect (QPI) and scalable memory interconnects, ensuring signal integrity across multiple high-bandwidth channels.

Replacement Considerations

For higher output counts or variations, contact Skyworks Solutions directly. Verify pinout and electrical specifications against alternative buffer devices if sourcing from different manufacturers.

FAQ

What is the default state of the outputs when PWRGD is low?

When PWRGD is low, all outputs are disabled, presenting a Low/Low state regardless of other inputs.

How is the operating frequency selected?

Frequency selection is determined by the 100M_133M hardware pin. A logic 1 selects 100.00 MHz, and a logic 0 selects 133.33 MHz.

Can the device tolerate spread spectrum clocking?

Yes, the Si53108 is spread spectrum tolerant and can operate with -0.5% modulation.