DSC557-0344SI1T

Overview

The DSC557-0344SI1T is a two-output PCI Express clock generator utilizing silicon MEMS technology. It provides 100 MHz differential HCSL outputs compliant with PCIe Gen1 through Gen4 specifications. The device integrates an internal resonator, eliminating the need for external crystals. It operates on a 2.25V to 3.6V supply within an industrial temperature range of -40°C to +85°C. Packaged in a 16-TSSOP format, it features an active-high output enable pin and supports low power consumption.

Feature Summary

• Complies with PCIe Gen1/2/3/4 Common Clock Specifications
• Integrated MEMS Resonator eliminates external 25 MHz crystal requirements
• Two 100 MHz HCSL differential outputs with Output Enable/Disable functionality
• Industrial temperature range (-40°C to +85°C) with 2.25V to 3.6V supply voltage

Applications

• Ethernet (1G, 10GBASE-T/KR/LR/SR)
• Storage Area Networks (SAN), Network Attached Storage (NAS), SSDs
• Routers, Switches, Gateways, VoIP, and Wireless Access Points

Procurement Notes

Verify the package type against datasheet documentation. The official Microchip datasheet specifies a 14-Lead QFN package for the DSC557-03 series. Confirm if the 16-TSSOP designation represents a specific variant or data discrepancy before procurement.

Selection Notes

Select this component for designs requiring compliance with PCIe Gen1 to Gen4 common clock standards. Ensure the design accommodates the 100 ppm frequency stability and utilizes the OE pin for output control. Verify thermal management for the TSSOP package if operating near the upper temperature limit.

Part Context

This part belongs to the DSC557-03 family of two-output PCIe clock generators. It replaces traditional quartz oscillators with silicon MEMS technology to improve reliability and shock resistance. The device accelerates product development by removing external crystal dependencies.

Replacement Considerations

Direct replacements include other DSC557-03 variants with different output formats (LVDS/LVCMOS) or packages (QFN). Cross-reference the specific suffix codes for package and temperature variations.