ICS9FG104DGILF

Overview

The ICS9FG104DGILF is a frequency timing generator designed for Intel CPU servers, PCI Express (PCIe), and SATA applications. It synthesizes output frequencies from a 14.31818 MHz or 25 MHz crystal input, or an external reference clock. The device provides four differential output pairs compliant with the Intel CK410 specification, featuring cycle-to-cycle jitter of less than 50 ps and output-to-output skew of less than 35 ps. It operates within a supply voltage range of 3.135V to 3.465V and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Provides four 0.7V current-mode differential output pairs compliant with Intel CK410 specifications.
• Supports spread spectrum modes including 0 to -0.5% downspread and +/-0.25% centerspread for EMI reduction.
• Features SMBus control for software-based frequency selection and configuration.
• Includes DIF_STOP# pin functionality to stop differential outputs in driven or Hi-Z states.

Applications

• Intel CPU Server systems
• PCI Express (PCIe) Gen 2 reference clocks
• SATA interface clocking

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. The 'I' suffix indicates the industrial temperature range (-40°C to +85°C), while 'G' denotes the TSSOP package. Confirm RoHS compliance status based on the 'LF' suffix if lead-free components are required for the assembly process.

Selection Notes

Select this component when designing for PCIe Gen 2 or SATA environments requiring low jitter performance. Ensure the design accommodates the 3.3V nominal supply voltage and utilizes the SMBus interface for dynamic frequency configuration if hardware strap pins are insufficient for the system requirements.

Part Context

This part belongs to the IDT Frequency Generator family optimized for high-speed serial interfaces. It is manufactured by Renesas Electronics Corporation, which acquired Integrated Device Technology (IDT). The device serves as a critical timing source for processors and expansion slots in enterprise computing platforms.

Replacement Considerations

The ICS9FG104DFILF is a compatible alternative offering the same electrical specifications but packaged in a 28-pin SSOP format instead of TSSOP. Designers must verify footprint compatibility when substituting between these package types.