CD74HCT541E

Overview

The CD74HCT541E is an octal buffer and line driver manufactured by Texas Instruments, belonging to the HCT logic series. It features eight non-inverting inputs and outputs with three-state capability. The device operates within a supply voltage range of 4.5 V to 5.5 V. It provides a high-level output current of -6 mA and a low-level output current of 6 mA. The static current consumption is 8 uA, while the operating supply current is 80 uA. Propagation delay is specified at 28 ns when measured at 4.5 V. The component is housed in a 20-pin SOIC package and supports surface mount installation.

Feature Summary

• Provides eight non-inverting signal paths for buffering and line driving applications
• Features three-state outputs allowing multiple drivers to share bus lines
• Compatible with standard TTL logic input levels through HCT technology
• Operates reliably across extended industrial temperature ranges

Applications

• Bus-oriented memory and address drivers
• Clock distribution and buffering circuits
• Data register input/output isolation
• Carry propagation in arithmetic logic units

Procurement Notes

Verify the specific suffix E against the manufacturer datasheet to confirm the package type and tape/reel specifications. Ensure the order matches the required RoHS compliance status and moisture sensitivity level. Cross-reference the ordering number with official Texas Instruments documentation to avoid confusion with similar variants like the D or PWR suffixes which denote different packages.

Selection Notes

Select this component when interfacing between systems requiring HCT logic compatibility and robust drive capabilities. The three-state feature is essential for bidirectional data buses where multiple devices must connect to common lines without contention. Consider the 20-pin SOIC footprint for PCB layout constraints and verify that the 6 mA output current meets the load requirements of the destination circuitry.

Part Context

This part belongs to the SN74HCT541 family of octal buffers and line drivers. It shares functional similarities with other members like the SN74HCT541DWR and SN74HCT541PWRG4, differing primarily in packaging and thermal characteristics. The HCT series bridges the gap between older TTL standards and modern CMOS power efficiency, making it suitable for legacy system upgrades.

Replacement Considerations

SN74HCT541DWR

FAQ

What is the logic polarity of the CD74HCT541E?

The device is non-inverting, meaning the output state follows the input state directly.

How does the three-state output function work?

The outputs enter a high-impedance state when the enable inputs are inactive, effectively disconnecting them from the circuit.