SI53019-A01AGM

Overview

The SI53019-A01AGM is a clock buffer IC designed for Intel QPI and PCI Express applications. It features a 1:19 input-to-output ratio with one differential input and nineteen differential outputs. The device operates at a maximum frequency of 133.33MHz using an internal PLL. Outputs utilize 0.7V current-mode HCSL signaling compatible with PCIe Gen 3 standards. Power supply voltage ranges from 3.135V to 3.465V. The component is housed in a 72-VFQFN package with exposed pad, measuring 10x10mm. Operating temperature spans -40°C to 85°C.

Feature Summary

• Provides nineteen 0.7 V current-mode HCSL outputs for high-speed serial bus distribution
• Integrates a PLL supporting 100 MHz and 133 MHz operation for PCIe and QPI compatibility
• Features software-selectable PLL bandwidth via SMBus interface

Applications

• Intel QuickPath Interconnect (QPI) systems
• PCI Express (PCIe) Gen 3 clock distribution
• High-speed server and workstation motherboard designs

Procurement Notes

Verify component status as the SI53019-A01AGM is officially listed as End-of-Life (EOL). Confirm availability through authorized distributors or secondary markets only. Check Product Change Notices (PCN) for any manufacturing source changes or specification updates prior to procurement. Ensure replacement strategies are evaluated due to discontinuation.

Selection Notes

Select this component when a single differential clock source must fan out to nineteen distinct HCSL loads in PCIe or QPI architectures. Verify that the required output count matches the 1:19 ratio exactly. Ensure system power rails align with the 3.135V to 3.465V operating range. Consider the 72-QFN package constraints for PCB layout and thermal management requirements.

Part Context

This part belongs to the Skyworks SI53019 family of application-specific clock buffers. It is engineered specifically for demanding interconnect protocols requiring precise timing and low jitter. The device integrates PLL functionality to clean and distribute reference clocks. It serves as a critical timing element in complex digital systems requiring multiple synchronized clock domains.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the EOL status, alternative solutions require manual evaluation of pinout, electrical parameters, and functional compatibility with existing design constraints.