841S101EGILFT

Overview

The IDT 841S101EGILFT is a PLL-based clock synthesizer designed for PCI Express applications. It generates a 100MHz differential HCSL output from a 25MHz crystal or external reference input. The device operates on a 3.3V supply within -40°C to 85°C ambient temperature. Key electrical specifications include a typical RMS phase jitter of 1.23ps (12kHz-20MHz) and a maximum cycle-to-cycle jitter of 20ps at 100MHz. It features I2C support for spread spectrum configuration and complies with PCIe Gen 1, 2, and 3 jitter requirements.

Feature Summary

• Generates 100MHz differential HCSL clock from 25MHz input
• I2C interface supports readback and spread spectrum selection (-0.35% or -0.5%)
• Compliant with PCI Express Gen 1, 2, and 3 jitter standards
• Available in lead-free 16-Lead TSSOP package

Applications

• PCI Express Gen 1, 2, and 3 clock generation
• Systems requiring low jitter clock synthesis
• EMI reduction via spread spectrum clocking

Procurement Notes

Verify the specific suffix 'EGILFT' against official documentation to confirm package type, temperature grade, and tape/reel packaging details. Ensure the ordering code matches the required RoHS compliance and lead-free status specified by the manufacturer for this part number variant.

Selection Notes

Select this component when a 100MHz differential HCSL output is required from a 25MHz reference source. It is suitable for designs needing integrated spread spectrum capability for EMI management. Verify that the 16-TSSOP package fits the board layout constraints and that the 3.3V supply voltage aligns with the system power architecture.

Part Context

This device belongs to the 841S series of clock synthesizers optimized for high-speed serial interface standards. It integrates a PLL and crystal oscillator interface into a single chip, reducing component count compared to discrete solutions. The 841S101I family provides a standardized solution for timing applications in computer and communication equipment.

Replacement Considerations

Check for direct pin-compatible substitutes within the same 841S series or other PCIe clock generators offering identical 100MHz HCSL outputs. Confirm that any replacement maintains the same jitter performance metrics and I2C control functionality.