9FGU0831CKILF

Overview

The 9FGU0831CKILF is an obsolete 8-output, 1.5 V ultra-low-power PCIe clock generator from the IDT family, manufactured by Renesas Electronics. It supports PCIe Gen1-2-3 standards with a maximum output frequency of 100 MHz and a maximum input frequency of 27 MHz. The device operates within a supply voltage range of 1.8 V and consumes 12 mA of working power current. It features HCSL and LVCMOS output types with a typical jitter of 50 ps. Packaged in a 48-pin VFQFPN (6x6 mm) surface-mount format, it functions across a temperature range of -40°C to +85°C.

Feature Summary

• Eight differential outputs with LP-HCSL signaling for reduced resistor count
• Programmable slew rate and output amplitude for line length tuning
• Selectable spread spectrum levels (0%, -0.25%, -0.5%) for EMI reduction
• Dual selectable SMBus addresses allowing multiple devices on one segment

Applications

• PCI Express (PCIe) Gen1, Gen2, and Gen3 system designs
• Intel QPI interface clock generation
• Low-power server and workstation motherboard architectures

Part Context

This component belongs to the 9FGU0831 series of clock generators originally developed by Integrated Device Technology (IDT), now part of Renesas Electronics. The 'CKILF' suffix denotes the specific commercial temperature grade (-40°C to +85°C), lead-free (RoHS compliant) version housed in a tray package. It represents a legacy solution for low-voltage PCIe clocking before newer generations superseded its specifications.

Replacement Considerations

The manufacturer lists the 9FGV0831AKILF as a potential replacement. Designers should verify pin compatibility and electrical parameter alignment, such as output voltage levels and jitter performance, against the original datasheet requirements before substitution.