DSC557-0343SI1T

Overview

The DSC557-0343SI1T is a two-output PCI Express clock generator from Microchip Technology, utilizing silicon MEMS technology to eliminate the need for an external quartz crystal. It provides 100 MHz differential outputs in HCSL and LVDS formats, complying with PCIe Gen1/2/3/4 common clock specifications. The device operates on a supply voltage of 2.25V to 3.6V and supports an industrial temperature range of -40°C to +85°C. It features an output enable/disable function and is housed in a 16-TSSOP package.

Feature Summary

• Complies with PCIe Gen1/2/3/4 Common Clock Spec
• Integrated MEMS Resonator eliminates external 25 MHz crystal requirement
• Dual output formats: HCSL (CLK1) and LVDS (CLK0)
• Industrial temperature range (-40°C to +85°C) with ±50 ppm frequency stability

Applications

• PCI Express compliant systems
• Communications and networking equipment
• Storage solutions (SAN, NAS, SSD)

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System to confirm output formats, package type, and temperature grade. Ensure the selected variant matches the required PCB footprint and environmental operating conditions for the target application design.

Selection Notes

Select this component when a low-jitter, crystal-less PCIe timing solution is required for industrial environments. Confirm that the HCSL and LVDS output combinations meet the receiver requirements of the connected PCIe endpoints. Verify power supply filtering requirements as specified in the datasheet electrical characteristics.

Part Context

This part belongs to the DSC557-03 series, which offers two-output configurations for PCIe applications. Other variants in the family provide different output format combinations such as LVCMOS or dual HCSL, and are available in 14-Lead QFN packages for space-constrained designs.

Replacement Considerations

Direct replacements within the same series include other DSC557-03 variants with different output formats or packages, such as DSC557-0344FI0 (dual HCSL, 14-QFN). Cross-family substitution requires verification of pin compatibility and jitter performance against PCIe specifications.