PI49FCT32805QEX

Clock Buffers, Drivers Overview

The PI49FCT32805QEX is a 3.3V CMOS clock driver manufactured by Diodes Incorporated (formerly Pericom). It features two independent groups of 1-to-5 non-inverting drivers with separate output enables. Group B includes an additional monitor output. Key electrical parameters include a maximum propagation delay of 3.0ns, output skew under 270ps, and a switching frequency up to 133MHz. The device operates within a supply voltage range of 3.3V ±10% and supports industrial temperatures from –40°C to +85°C. Integrated series damping resistors are present on all outputs.

Clock Buffers, Drivers Feature Summary

• Low output skew of less than 270ps
• Switching frequency capability of 133 MHz
• Fast rise/fall times under 1.5ns
• Integrated series damping resistors on all outputs

Clock Buffers, Drivers Applications

• Computing applications requiring fast clock distribution
• Communication systems needing low skew timing
• CMOS logic buffering and driving

Clock Buffers, Drivers Procurement Notes

Verify the 'E' suffix indicates Pb-free and Green packaging status. Confirm the 'X' suffix denotes Tape/Reel packaging format. Ensure the base model matches the specific package variant required for the design.

Clock Buffers, Drivers Selection Notes

Select this component when low propagation delay and minimal skew are critical for system timing integrity. The integrated damping resistors simplify PCB layout by reducing signal reflections. Verify that the 3.3V supply voltage aligns with the target system architecture.

Clock Buffers, Drivers Part Context

This part belongs to the FCT32805 family of high-speed CMOS clock drivers. The Q suffix identifies the 20-pin 150-mil wide QSOP package option. The E suffix confirms environmental compliance regarding lead content.

Clock Buffers, Drivers Replacement Considerations

Check for direct pin-compatible alternatives within the same FCT family or comparable 3.3V clock drivers from other manufacturers. Ensure switching speed and current drive capabilities meet or exceed the original specifications.

Clock Buffers, Drivers FAQ

What is the function of the MON pin?

The MON pin serves as a monitor output for Group B, providing a buffered version of the input signal INB.

How are the outputs configured?

The outputs are arranged into two groups: Group A has one input (INA) driving five outputs (OA0-OA4), and Group B has one input (INB) driving five outputs (OB0-OB4) plus the MON output.

What is the typical input capacitance?

The typical input capacitance is 4 pF, with a maximum of 6 pF.