841S104EGILF

Overview

The Renesas 841S104EGILF is a PLL-based clock synthesizer designed for PCI Express applications. It generates a 100MHz differential HCSL clock from a 25MHz input reference, which can be derived from an external source or an on-chip crystal oscillator. The device features spread spectrum clocking with I2C-controlled down-spread options of -0.35% or -0.5%. It operates on a single 3.3V supply within a temperature range of -40°C to +85°C and is housed in a lead-free 24-lead TSSOP package.

Feature Summary

• Generates 100MHz differential HCSL output from 25MHz input
• Supports spread spectrum clocking via I2C interface
• Compatible with internal or external 25MHz crystal references
• Operates at 3.3V with -40°C to +85°C temperature range

Applications

• PCI Express clock generation
• Spread spectrum EMI reduction systems

Procurement Notes

Verify the specific suffix 'EGILF' against the manufacturer's current datasheet to confirm package dimensions and pinout compatibility. Ensure the design supports the required 24-lead TSSOP footprint and that the I2C bus configuration matches the device's control requirements for spread spectrum selection.

Selection Notes

Select this component when a fixed 100MHz differential HCSL output is required from a 25MHz reference for PCIe interfaces. Consider the I2C programmability for EMI optimization if spread spectrum functionality is needed. Verify that the 24-lead TSSOP package fits the board space constraints compared to other FemtoClock variants.

Part Context

This part belongs to the Renesas FemtoClock family of low-jitter clock synthesizers. The 841S104I variant is specifically optimized for PCI Express standards, distinguishing it from other models in the series that may target Ethernet or SONET frequencies such as 156.25MHz.

Replacement Considerations

Check for updated suffixes or revised revisions of the 841S104I series. No direct cross-model substitutes are confirmed in public documentation; verify pin-to-pin compatibility with any alternative clock generators.