557M-01LFT

Overview

The Renesas 557M-01LFT is a clock generator designed for PCI Express applications. It accepts a 25 MHz input and generates a single 100 MHz output using internal PLL techniques. The device operates on a 3.3 V supply with a typical current consumption of 55 mA. It is housed in an 8-pin SOIC package and supports HCSL differential outputs, with LVDS levels available via alternative termination. The component functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Generates 100 MHz clock from 25 MHz crystal input
• Single differential output supporting HCSL signaling
• Compact 8-pin SOIC surface-mount packaging
• Low power operation at 55 mA supply current

Applications

• PCI Express card clock sources
• Embedded system timing
• PC motherboard clock distribution

Procurement Notes

Verify the specific suffix 'LFT' against the manufacturer's latest datasheet to confirm lead-free status and RoHS compliance details. Confirm the package type matches the required PCB footprint, as variations may exist within the 557M series. Check for any pinout differences if substituting with older ICS branded equivalents.

Selection Notes

Select this component when a single 100 MHz differential clock source is required for PCIe Gen1 interfaces. Ensure the design accommodates the 8-pin SOIC footprint. Consider the 557G series if multiple outputs or higher frequencies are needed. Verify that the 0°C to +70°C operating range meets the environmental requirements of the target application.

Part Context

This part belongs to the 557M family of clock generators optimized for PCI Express standards. It serves as a foundational timing solution for legacy PCIe Gen1 designs. The device utilizes Renesas (formerly IDT) patented PLL technology to derive stable clock signals from low-frequency crystals.

Replacement Considerations

Publicly confirmed substitute part numbers for the 557M-01LFT were not found in the provided documentation.