ICS9250CF-10

Overview

The ICS9250CF-10 is a clock and frequency generator IC designed for Intel CPU server applications. It features a single circuit with a crystal input and up to 27 clock outputs, providing a 1:27 input-to-output ratio. The device operates at a maximum frequency of 133MHz and includes an internal PLL. It requires a supply voltage between 3.135V and 3.465V and functions within a commercial temperature range of 0°C to 70°C. The component is housed in a 56-BSSOP surface-mount package.

Feature Summary

• Generates up to 27 synchronized clock outputs from a single crystal input
• Integrated Phase-Locked Loop (PLL) for frequency synthesis
• Optimized specifically for Intel CPU server timing requirements
• Operates on a 3.3V nominal supply voltage (3.135V–3.465V)

Applications

• Intel CPU Server motherboards
• Server system clock distribution
• High-performance computing platforms

Procurement Notes

This component is officially listed as obsolete by the manufacturer. Verification of availability should focus on distributor surplus or secondary market sources rather than direct manufacturing orders. Confirm the specific suffix 'LFT' indicates lead-free compliance and tape-and-reel packaging if required for assembly processes.

Selection Notes

Select this part only when designing for legacy Intel CPU server architectures requiring a 1:27 clock fan-out. Ensure the design supports a crystal input rather than a differential clock source. Verify that the 56-SSOP footprint matches the PCB layout constraints and that the 0°C to 70°C operating range meets the environmental specifications of the target system.

Part Context

The ICS9250CF-10 belongs to the 9250CF series of clock generators manufactured by Renesas Electronics (formerly IDT). This series was widely used in enterprise server platforms to provide precise timing signals for processors and memory controllers. The '10' suffix typically denotes the specific output frequency configuration within the family.

Replacement Considerations

Due to the obsolete status, direct replacements must be sourced from inventory or alternative distributors. No official cross-reference part numbers are provided in the verified documentation. Designers may need to evaluate newer Renesas clock generators with compatible pinouts or utilize adapter boards if physical compatibility is critical.