PI49FCT3805AQ

Clock Buffers, Drivers Overview

The PI49FCT3805AQ is a 3.3V non-inverting clock driver manufactured by Diodes Incorporated, featuring two independent buffer groups with a 1-in, 5-out configuration per bank. It operates within a supply voltage range of 3.0V to 3.6V and supports an industrial temperature range of –40°C to +85°C. The device provides extremely low output skew of 0.5ns maximum and includes a monitor output pin for diagnostics. It accepts TTL-compatible CMOS inputs and delivers CMOS outputs with hysteresis on all input pins.

Clock Buffers, Drivers Feature Summary

• Two independent 1:5 fanout buffer banks with active LOW 3-state Output Enable controls
• Extremely low output skew of 0.5ns maximum between outputs
• Includes a dedicated MON pin providing a buffered copy of the input signal for diagnostics
• TTL input and CMOS output compatibility with hysteresis on all inputs

Clock Buffers, Drivers Applications

• Clock bus distribution with 3-state control
• High-speed clock distribution requiring low skew and high signal quality
• Single point-to-point transmission line driving for address distribution

Clock Buffers, Drivers Procurement Notes

Verify the ordering suffix 'Q' corresponds to the 20-pin 150-mil wide QSOP package. Confirm the 'A' speed grade matches the required propagation delay specifications. Check for the 'E' suffix if Pb-free and Green compliant packaging is required, as standard versions may differ in environmental compliance status.

Clock Buffers, Drivers Selection Notes

Select this component when low skew and precise timing are critical for clock distribution networks. Ensure the load capacitance does not exceed 50pF to maintain specified switching characteristics. Verify that the 3.3V supply voltage aligns with the system power rails and that TTL-compatible input levels are supported by the source drivers.

Clock Buffers, Drivers Part Context

The PI49FCT3805AQ belongs to the PI49FCT series of 3.3V Fast CMOS buffers. It is the non-inverting counterpart to the PI49FCT3806. The 'A' suffix denotes a specific speed grade with a maximum propagation delay of 5.8ns at CL=50pF, offering faster performance than the standard grade but slower than the B and C grades.

Clock Buffers, Drivers Replacement Considerations

PI49FCT3805BQE offers improved speed with a max propagation delay of 5.0ns. PI49FCT3805CQE provides the fastest performance with a max propagation delay of 4.5ns. Both maintain the same QSOP-20 package and functional pinout.