PI49FCT3805QE

Clock Buffers, Drivers Overview

The PI49FCT3805QE is a 3.3V non-inverting clock driver manufactured by Diodes Incorporated, designed for high-speed signal distribution. It features two independent buffer groups, each providing a 1-to-5 fan-out configuration from standard TTL-compatible CMOS inputs to CMOS outputs. The device operates within a supply voltage range of 3.0V to 3.6V and supports an industrial temperature range of –40°C to +85°C. Key electrical specifications include a maximum propagation delay of 6.5ns at 50pF load, extremely low output skew of 0.7ns, and typical static power consumption of 1mW. The component utilizes a 20-pin QSOP package.

Clock Buffers, Drivers Feature Summary

• Dual independent 1:5 buffer groups with active LOW 3-state Output Enable controls
• Extremely low output skew (0.7ns) and propagation delay (max 6.5ns)
• TTL input and CMOS output compatibility with hysteresis on all inputs
• Totally lead-free, RoHS compliant, and halogen/antimony free construction

Clock Buffers, Drivers Applications

• Clock busing systems requiring 3-state control
• High-speed digital circuit clock distribution
• Industrial equipment operating in extreme temperatures

Clock Buffers, Drivers Procurement Notes

Verify the specific speed grade suffix associated with the 'QE' designation against the manufacturer's ordering guide, as performance parameters vary between B, C, and blank grades. Confirm that the 20-pin QSOP package dimensions align with PCB footprint requirements. Ensure compliance with RoHS 3 and REACH regulations if required by local standards. Check for any recent Product Change Notifications regarding packaging or assembly sources.

Clock Buffers, Drivers Selection Notes

Select this component when a non-inverting clock buffer with dual 1:5 fan-out is required. Compare propagation delay limits based on the specific speed grade (B, C, or standard) needed for the target frequency. Ensure the load capacitance does not exceed 50pF to maintain specified timing characteristics. Verify that the 3.3V supply voltage matches the system architecture and that TTL-level input signals are compatible with the defined VIH/VIL thresholds.

Clock Buffers, Drivers Part Context

This part belongs to the PI49FCT series of 3.3V Fast CMOS buffers. It serves as the non-inverting counterpart to the PI49FCT3806, which provides inverting outputs. Both devices share identical pinouts and mechanical footprints, differing only in logic polarity. The series is engineered to replace older 5V FCT devices while offering improved speed and lower power consumption.

Clock Buffers, Drivers Replacement Considerations

The PI49FCT3806QE is a direct functional substitute if inverting logic is acceptable. Other speed grades within the same package, such as PI49FCT3805BQE or PI49FCT3805CQE, offer tighter timing specifications but may require verification of availability.