557M-01LF

Overview

The Renesas 557M-01LF is a clock generator designed for PCI Express applications. It accepts a 25 MHz crystal input and generates a single differential output at 100 MHz using Host Clock Signal Level (HCSL) signaling. The device utilizes phase-locked loop techniques to produce the clock signal. It operates on a 3.3 V supply with a typical power consumption of 182 mW. The component is housed in an 8-pin SOIC package, measuring 4.9 x 3.9 x 1.5 mm. It supports LVDS signal levels via alternative termination schemes.

Feature Summary

• Generates 100 MHz differential HCSL outputs from a 25 MHz crystal input
• Supports LVDS signal levels through alternative termination
• Low power consumption of 182 mW typ at 3.3 V
• Available in compact 8-pin SOIC package

Applications

• PCI Express Gen1 cards as a clock source
• PC or embedded systems requiring low EMI clock generation

Procurement Notes

Verify RoHS compliance status and specific packaging options such as tube or reel configurations against current manufacturer documentation. Confirm lead-free status and environmental declarations prior to procurement. Ensure the ordering suffix matches the required package type and temperature range specifications.

Selection Notes

Select this component for designs requiring a dedicated 100 MHz clock source for PCI Express interfaces. Verify that the system requires HCSL or LVDS output signaling compatible with the target receiver. Ensure the design accommodates the 8-pin SOIC footprint and provides appropriate termination resistors for the selected output level.

Part Context

This part belongs to the 557M series of clock generators optimized for PCI Express standards. It serves as a foundational timing component for high-speed serial interfaces, providing stable clock signals with spread-spectrum capabilities to mitigate electromagnetic interference in digital systems.

Replacement Considerations

For PCI Express Gen2 applications, consider the 5V41064. For Gen3 applications, refer to the 5V41234. Direct pin-to-pin replacements within the same family should be verified against specific electrical parameter requirements.