DSC557-0344SI0

Overview

The DSC557-0344SI0 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 common clock specifications. The device integrates an internal MEMS resonator, eliminating the need for external quartz crystals. It operates within a supply voltage range of 2.25V to 3.6V and supports an industrial temperature range of -40°C to +85°C. Key electrical parameters include a typical period jitter of 2.5 ps RMS and a frequency stability of ±100 ppm.

Feature Summary

• Complies with PCIe Gen1/2/3/4 Common Clock Specifications
• Integrated MEMS Resonator eliminates external 25 MHz crystal requirements
• Two-output configuration with dedicated Output Enable (OE) control
• Qualified to MIL-STD-883 standards for shock and vibration immunity

Applications

• PCI Express interfaces in storage systems (SAN, NAS, SSD)
• Networking equipment including routers, switches, and gateways
• Embedded applications such as industrial controls and avionics

Procurement Notes

Verify the package type against the datasheet; the standard DSC557-03 family typically utilizes a 14-lead QFN. Confirm that the 'I' suffix correctly denotes the Industrial temperature grade (-40°C to +85°C). Ensure the ordering suffix aligns with the required output format and media type specified in the manufacturer's product identification system.

Selection Notes

Select this component for designs requiring low-jitter PCIe timing without external crystals. Verify compatibility with the target system's power supply voltage (2.25V–3.6V). Consider the 14-lead QFN footprint if space is constrained. Ensure the application environment falls within the specified -40°C to +85°C operating range.

Part Context

The DSC557-03 series replaces traditional quartz oscillators using silicon MEMS technology to improve reliability and reduce board space. This specific part number represents a variant within the two-output PCIe clock generator family, designed to accelerate product development in communications and storage markets by meeting stringent jitter performance criteria.

Replacement Considerations

The DSC557-03 is designed as a direct replacement for the ICS557-03. When substituting, verify pinout compatibility and ensure the new MEMS-based device meets the specific jitter and temperature requirements of the original design.