CY74FCT540CTQCT

Overview

The CY74FCT540CTQCT is an octal bus driver manufactured by Texas Instruments, belonging to the FCT logic series. It features eight non-inverting inputs and outputs with three-state capability, housed in a QSOP-20 surface-mount package. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input levels. Key electrical parameters include a propagation delay of 4.8 ns at 5 V, a high-level output current of -32 mA, and a low-level output current of 64 mA. It functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides octal buffering with three-state output control for efficient bus management
• Accepts TTL-compatible input signals while driving CMOS loads
• Delivers high drive strength suitable for direct interface applications

Applications

• Bus-oriented memory and address drivers
• Clock drivers and buffer circuits
• Control signal routing in industrial systems

Procurement Notes

Verify the specific suffix 'CTQCT' against the manufacturer's official datasheet to confirm the exact package type and tape-and-reel specifications. Ensure compatibility with moisture sensitivity level requirements during assembly. Cross-reference the ordering part number with the latest Texas Instruments documentation to avoid discrepancies in pinout or electrical characteristics.

Selection Notes

Select this component when an octal, non-inverting buffer with three-state outputs is required for TTL-to-CMOS interfacing. The FCT series offers faster switching speeds compared to standard 74F logic. Consider the QSOP-20 package constraints and thermal performance for your specific PCB layout and ambient operating conditions.

Part Context

This part belongs to the Texas Instruments CY74FCT family, which combines the speed of bipolar logic with the low power consumption of CMOS technology. The 540 designation specifically indicates an octal buffer/driver configuration. This series is designed for high-performance digital systems requiring reliable data transmission and minimal power dissipation.

Replacement Considerations

Check for CY74FCT540ATQCT or other variants within the same FCT family that may offer identical functionality with different suffix designations for packaging or temperature grades.