557GI-03LF

Overview

The Renesas Electronics 557GI-03LF is a spread spectrum clock generator designed for PCI Express Gen 1 and Ethernet applications. It utilizes a phase-locked loop (PLL) to accept a 25 MHz crystal input and generate two differential outputs at frequencies of 25, 100, 125, or 200 MHz. The device operates on a single 3.3 V supply with a maximum operating frequency of 200 MHz and an input frequency of 25 MHz. Packaged in a 16-pin TSSOP, it supports HCSL and LVDS output types to reduce electromagnetic interference in PC and embedded systems.

Feature Summary

• Spread spectrum clock generation for EMI reduction in PCIe Gen 1 and Ethernet
• Two differential outputs configurable via select pins
• Supports 25 MHz, 100 MHz, 125 MHz, and 200 MHz output frequencies
• Operates within -40°C to +85°C temperature range

Applications

• PCI Express Gen 1 clock sources
• Ethernet system timing
• PC motherboard designs
• Embedded systems requiring low EMI

Procurement Notes

Verify the suffix 'LF' indicates lead-free compliance against RoHS standards. Confirm package type is 16-TSSOP. Check moisture sensitivity level (MSL 1) requirements for storage and handling. Ensure compatibility with 3.3V supply voltage specifications.

Selection Notes

Select this component when a 1:2 ratio clock distribution is required for PCIe Gen 1. Compare against variants like 557GI-03LFT if reel packaging is preferred over tube. Verify output format requirements (HCSL/LVDS) match the target receiver inputs.

Part Context

This part belongs to the 557-03 series of clock generators from Renesas. It serves as a direct replacement for older ICS branded parts with similar pinouts and functionality. The device is distinct from muxes or buffers in the same family by its specific spread spectrum generation capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.