ICS9FG104CGLF

Overview

The ICS9FG104CGLF is a frequency timing generator manufactured by Renesas Electronics Corporation, housed in a 28-TSSOP package. It synthesizes output frequencies from 14.318 MHz or 25 MHz crystal inputs to generate four differential clock pairs compliant with Intel CK410 specifications. The device supports PCI Express and SATA standards, delivering outputs up to 400 MHz with cycle-to-cycle jitter under 50 ps and output-to-output skew under 35 ps. Operating on a 3.135 V to 3.465 V supply within a 0°C to 85°C temperature range, it features SMBus programmability for frequency selection and spread spectrum control.

Feature Summary

• Generates four 0.7V current-mode differential output pairs compliant with Intel CK410 specifications.
• Supports PCIe Gen 2 and SATA applications with phase jitter meeting PCIe Gen 2 requirements (3.1 ps rms).
• Features two spread spectrum modes: 0 to -0.5% downspread and +/-0.25% centerspread.
• Allows frequency selection via hardware strap pins or SMBus control.

Applications

• Intel CPU Server systems
• PCI Express (PCIe) reference clocks
• SATA interface timing

Procurement Notes

Verify the manufacturer designation as Renesas Electronics Corporation, noting the component's historical lineage from Integrated Device Technology (IDT). Confirm the specific ordering suffix 'CGLF' corresponds to the TSSOP-28 package and RoHS compliance status. Ensure the procurement documentation explicitly references the datasheet revision O dated 12/03/08 for accurate electrical parameter validation.

Selection Notes

Select this component when designing systems requiring fixed-frequency synthesis from 14.318 MHz or 25 MHz crystals for PCIe Gen 2 or SATA interfaces. It is suitable for designs needing low jitter (<50 ps cycle-to-cycle) and precise output skew (<35 ps). Consider SMBus configurability if dynamic frequency adjustment is required during operation. Ensure the design accommodates the 3.3 V nominal supply voltage and 28-pin TSSOP footprint constraints.

Part Context

The ICS9FG104 belongs to the IDT/ICS family of frequency generators designed for high-performance computing platforms. Originally developed by Integrated Device Technology before its acquisition by Renesas, this part specifically targets server and storage subsystems. It serves as a dedicated clock source replacing discrete oscillator solutions, integrating PLL functionality and differential drivers into a single compact package.

Replacement Considerations

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