ICS9FG104DFILF

Overview

The ICS9FG104DFILF is a frequency timing generator manufactured by Renesas Electronics Corporation, housed in a 28-SSOP package. It synthesizes output frequencies from a 14.318 MHz or 25 MHz crystal input, supporting up to 400 MHz maximum output frequency. The device provides four differential output pairs compliant with Intel CK410 specifications, featuring cycle-to-cycle jitter under 50 ps and output-to-output skew under 35 ps. Operating within an industrial temperature range of -40°C to +85°C, it utilizes a 3.135V to 3.465V supply voltage.

Feature Summary

• Generates common frequencies from 14.318 MHz or 25 MHz inputs
• Provides 4 differential 0.7V current-mode output pairs
• Supports spread spectrum modes: 0 to -0.5% downspread and +/-0.25% centerspread
• Includes SMBus control for frequency selection and configuration

Applications

• Intel CPU Server clock generation
• PCI Express (PCIe) Gen 2 reference clocks
• SATA interface clocking at 100 MHz
• QPI and FBD memory system timing

Procurement Notes

Verify the specific suffix 'DFILF' corresponds to the 28-pin SSOP package and industrial temperature grade (-40°C to +85°C). Confirm RoHS compliance via the 'LF' designation. Check for updated datasheets as IDT was acquired by Renesas, ensuring documentation reflects current manufacturing standards.

Selection Notes

Select this component when designing systems requiring low-jitter differential clocks for PCIe Gen 2 or SATA interfaces. Ensure the design accommodates the 28-SSOP footprint and 3.3V power supply constraints. Verify that the required output frequencies fall within the supported range derived from the 14.318 MHz or 25 MHz reference inputs.

Part Context

This part belongs to the ICS9FG104 family of frequency generators originally developed by Integrated Device Technology (IDT), now part of Renesas Electronics. It is designed to replace older clock solutions in high-performance computing platforms, specifically targeting server motherboards and storage controllers requiring precise timing synchronization.

Replacement Considerations

Direct pin-compatible replacements include other members of the ICS9FG104 series such as the ICS9FG104DGLF (commercial temp) or ICS9FG104DGILF (industrial temp, TSSOP package). Verify electrical parameters match if substituting with non-IDT/Renesas parts.