DSC557-04444KL1

Overview

The DSC557-04444KL1T is a crystal-less, three-output PCI Express clock generator based on silicon MEMS technology. It meets PCIe Gen1, Gen2, and Gen3 specifications with a maximum frequency of 460MHz. The device features HCSL output formats for all three channels and operates within a supply voltage range of 2.25V to 3.6V. It supports an extended industrial temperature range from -40°C to 105°C and utilizes a 20-VFQFN package with an exposed pad.

Feature Summary

• Crystal-less design using silicon MEMS technology eliminates the need for external quartz crystals.
• Three differential outputs compliant with PCIe Gen1, Gen2, and Gen3 standards.
• Configurable output formats including HCSL, LVDS, and LVPECL.
• Independent output enable/disable control via OE1 and OE2 pins.

Applications

• Ethernet (1G, 10GBASE-T/KR/LR/SR)
• Storage Area Networks (SAN) and Network Attached Storage (NAS)
• Routers, Switches, and Gateways
• Solid State Drives (SSD)

Procurement Notes

Verify the complete part number suffix against official documentation to confirm specific configuration details such as temperature grade, stability tolerance, and packaging type. Ensure compatibility with system power supply requirements and thermal management needs for the 20-QFN package.

Selection Notes

Select this component for applications requiring low jitter and high reliability in communication and storage systems. Consider the available output format options (HCSL, LVDS, LVPECL) to match interface requirements. Verify that the operating temperature range (-40°C to 105°C) aligns with the environmental conditions of the target application.

Part Context

The DSC557-04 series belongs to Microchip's family of crystal-less PCIe clock generators. These devices replace traditional quartz oscillators to improve shock and vibration immunity while reducing board space. The series offers multiple output configurations to support various PCIe topology requirements.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.

FAQ

How are the outputs controlled?

Outputs are controlled by two enable pins: OE1 controls CLK0, and OE2 controls CLK1 and CLK2. Setting these pins low disables the respective outputs.

What is the maximum operating frequency?

The maximum operating frequency is 460MHz, supporting PCIe Gen1, Gen2, and Gen3 specifications.

Does the device require an external crystal?

No, the DSC557-04 is a crystal-less generator that uses integrated silicon MEMS technology.