MC74ACT541MEL

Overview

The MC74ACT541MEL is an octal buffer and line driver from the onsemi ACT logic series, housed in a 20-lead SOEIAJ package. It features non-inverting outputs with three-state capability, allowing for high-impedance isolation when disabled. The device operates within a supply voltage range of 4.5 V to 5.5 V, supporting TTL-compatible inputs for direct interfacing with legacy logic families. Key electrical specifications include a propagation delay of 7 ns at 5 V, output drive currents of ±24 mA, and low static current consumption of 4 µA. It is rated for industrial operating temperatures from -40°C to +85°C.

Feature Summary

• Three-state outputs enable bus-oriented designs by isolating drivers when not selected.
• TTL-compatible inputs allow direct interface with standard TTL logic circuits.
• High drive capability supports multiple loads without external buffering.

Applications

• Memory address and data bus drivers
• Clock signal distribution buffers
• Microprocessor I/O port expansion

Procurement Notes

Verify the specific suffix MEL corresponds to the SOEIAJ-20 package configuration rather than standard SOIC or TSSOP variants. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure ESD handling protocols are followed during assembly due to CMOS sensitivity. Cross-reference pinouts with the official datasheet to prevent orientation errors during placement.

Selection Notes

Select this component when designing systems requiring octal buffering with three-state control and TTL input compatibility. The ACT series offers faster switching speeds compared to standard AC logic while maintaining similar power characteristics. Consider the SOEIAJ package constraints for PCB layout density and thermal management requirements in industrial environments.

Part Context

This part belongs to the MC74ACT541 family of octal bus drivers. It serves as a non-inverting counterpart to the MC74ACT540. The device is designed for high-density applications where input/output alignment across opposite package sides simplifies routing. It complements other ACT series components like the 74ACT244 for comprehensive bus interface solutions.

Replacement Considerations

MC74ACT541DTR2G (TSSOP-20 package)

FAQ

What is the logic polarity of the MC74ACT541MEL?

The device provides non-inverting (true) outputs, meaning the output state follows the input state directly.

How does the three-state feature function?

When either output enable pin is active high, all outputs enter a high-impedance state, effectively disconnecting them from the bus regardless of input signals.