ICS9FG104DGLFT

Overview

The ICS9FG104DGLFT is a frequency timing generator manufactured by Renesas Electronics Corporation, housed in a 28-TSSOP package. It synthesizes output frequencies from a 14.318 MHz or 25 MHz crystal input, or an external reference clock. The device provides four differential output pairs compliant with Intel CK410 specifications, supporting CPU, QPI, FBD, PCIe Gen 2, and SATA applications. Key electrical parameters include a maximum operating frequency of 400 MHz, a supply voltage range of 3.135V to 3.465V, and cycle-to-cycle jitter of less than 50 ps. It operates within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Generates common frequencies from 14.318 MHz or 25 MHz inputs
• Provides four 0.7V current-mode differential output pairs
• Supports Serial-ATA at 100 MHz and PCIe Gen 2
• Features two spread spectrum modes: 0 to -0.5% downspread and +/-0.25% centerspread

Applications

• Intel CPU Server systems
• PCI Express (PCIe) interfaces
• SATA storage controllers

Procurement Notes

Verify the manufacturer designation on the component marking, as IDT was acquired by Renesas. Confirm the suffix 'GLFT' corresponds to the 28-TSSOP package and commercial temperature grade (0°C to 70°C). Ensure compatibility with the required SMBus configuration for frequency selection if software control is utilized instead of hardware strap pins.

Selection Notes

Select this component when designing systems requiring low-jitter differential clocks for PCIe Gen 2 or SATA. The device supports both crystal and reference clock inputs. Frequency selection can be configured via hardware strap pins (FS0-FS3) or through the SMBus interface. Unused outputs can be disabled in either driven or Hi-Z states for power management optimization.

Part Context

This part belongs to the ICS9FG104 family of frequency generators originally developed by Integrated Device Technology (IDT), now part of Renesas Electronics. The 'D' revision indicates specific electrical characteristics and pinout configurations documented in datasheet 1541C. The 'GLFT' suffix denotes the Tape and Reel packaging format for the TSSOP variant.

Replacement Considerations

The ICS9FG104DFLFT serves as a direct replacement using the 28-pin SSOP package instead of TSSOP. For industrial temperature ranges (-40°C to +85°C), consider the ICS9FG104DGILFT or ICS9FG104DFILFT variants.