ICS9FG104DFLF

Overview

The ICS9FG104DFLF is a frequency timing generator manufactured by Renesas Electronics Corporation, originally designed by IDT. It provides four differential output pairs compliant with Intel CK410 specifications for CPU, QPI, FBD, PCIe Gen 2, and SATA applications. The device synthesizes frequencies from a 14.31818 MHz or 25 MHz crystal input, or a reference clock. Key electrical parameters include a maximum output frequency of 400 MHz, an operating 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 and is housed in a 28-SSOP package.

Feature Summary

• Generates common frequencies from 14.318 MHz or 25 MHz inputs
• Provides 4 differential output pairs (0.7V current-mode) compliant with Intel CK410
• Supports spread spectrum modes: 0 to -0.5% downspread and +/-0.25% centerspread
• Frequency selection via strap pins or SMBus control

Applications

• Intel CPU Server Clocking
• PCI Express (PCIe) Generation 2 Systems
• SATA Controllers (Supports Serial-ATA at 100 MHz)
• QPI and FBD Memory Interfaces

Procurement Notes

Verify the manufacturer origin as the part was originally an IDT product now under Renesas Electronics Corporation. Confirm the specific suffix 'DFLF' corresponds to the 28-pin SSOP package with a 0 to +70°C temperature range and tube packaging. Ensure compatibility with the required input crystal frequency (14.31818 MHz or 25 MHz) and check for any relevant Product Change Notifications (PCN) regarding assembly sites or material changes.

Selection Notes

Select this component when designing systems requiring low-jitter differential clocks for PCIe Gen 2 or SATA interfaces. Ensure the design supports the 3.3V nominal supply voltage (3.135V–3.465V). Verify that the 28-SSOP footprint matches the PCB layout constraints. Consider the SMBus interface requirements if software-based frequency configuration is needed instead of hardware strap pins.

Part Context

This part belongs to the ICS9FG104D family of frequency generators. It is functionally related to other variants such as the 9FG104EGLFT and ICS9FG104CGLFT, which share similar application domains but may differ in package type (TSSOP vs SSOP), temperature range, or specific output configurations. The 'DFLF' designation specifically indicates the SSOP package and commercial grade temperature rating.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Renesas/IDT replacement guides or contact technical support for qualified alternatives.