9107C-05CS08LF

Application Specific Clock/Timing Overview

The AV9107C-05CS08LF is a processor-specific clock generator manufactured by Integrated Circuit Systems, Inc. (ICS), now part of Renesas Electronics Corporation. It provides two simultaneous clock outputs: a fixed REFCLK matching the input reference frequency and a synthesized CLK1 output ranging from 2 to 120 MHz. The device utilizes a patented on-chip Phase-Locked Loop with VCO and includes internal ROM storing up to 16 selectable frequencies. Designed for low power CMOS operation, it supports single +3.3V or +5V supplies and features glitch-free frequency transitions, tristate outputs, and power-down capability.

Application Specific Clock/Timing Feature Summary

• Generates two simultaneous clocks: a buffered REFCLK and a synthesized CLK1 (2–120 MHz).
• Contains an on-chip PLL with VCO and loop filter, requiring only external decoupling capacitors.
• Stores up to 16 preprogrammed output frequencies in internal ROM for the -05 option.
• Supports glitch-free frequency transitions between stored values.

Application Specific Clock/Timing Applications

• Computer motherboard CPU frequency generation and speed switching.
• Graphics applications requiring VGA standard frequencies.
• Disk drive controllers for constant density recording.
• High-speed systems acting as proximity oscillators.

Application Specific Clock/Timing Procurement Notes

Verify the manufacturer designation, as the component was originally produced by ICS before being acquired by Renesas. Confirm the specific suffix 'CS08' corresponds to the 8-pin Plastic SOIC package. Ensure the design accommodates the original operating temperature range of 0°C to +70°C unless extended variants are specified.

Application Specific Clock/Timing Selection Notes

Select the AV9107C-05 variant specifically for its 14.318 MHz input frequency compatibility and associated ROM frequency table. Verify that the required output frequencies fall within the 2–120 MHz range supported by this option. Consider the 8-pin SOIC package dimensions if board space is constrained compared to DIP alternatives.

Application Specific Clock/Timing Part Context

This component belongs to the AV9107C family of clock generators designed to replace high-speed oscillators in legacy computer architectures. It serves as a direct replacement for older devices like the AV9105/6 when a reference clock output is also required. The device is optimized for system-level diagnostic testing via its tristate output enable feature.

Application Specific Clock/Timing Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate generic clock generators with similar PLL specifications and pinout compatibility if exact replacements are unavailable.

Application Specific Clock/Timing FAQ

What is the function of the SLOW CLOCK input?

The SLOW CLOCK input forces the CLK1 output to an 8 MHz frequency regardless of the FS pin conditions, facilitating smooth frequency transitions during power management states.

How many external components are required for jitter-free operation?

A minimum of two decoupling capacitors and an optional ferrite bead are required, as the device integrates the loop filter and PLL circuitry internally.

What is the maximum output frequency for the AV9107C-05 at 3.3V?

At a supply voltage of 3.3V, the maximum output frequency for the AV9107C-05 is limited to 66.6 MHz.