MC74ACT541DTG

Overview

The MC74ACT541DTG is an octal buffer and line driver from the 74ACT logic series, manufactured by onsemi. It features non-inverting outputs with three-state capability, housed in a 20-pin TSSOP package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 7.5 ns at 5 V, high-level output current of -24 mA, and low-level output current of 24 mA. Static current is specified at 8 uA, with a maximum power dissipation of 200 mW. It supports industrial operating temperatures from -40°C to +85°C.

Feature Summary

• Three-state outputs allow isolation from the bus when disabled, preventing signal interference.
• TTL-compatible inputs enable direct interfacing with TTL logic circuits without additional level shifting.
• Through architecture places inputs and outputs on opposite sides of the package, facilitating dense PCB layout and microprocessor port interfaces.

Applications

• Memory address and data bus driving
• Clock signal distribution and buffering
• Microprocessor output port expansion

Procurement Notes

Verify the specific suffix 'DTG' confirms the TSSOP-20 package and lead-free RoHS compliance as documented in the official datasheet. Ensure the order matches the exact part number to avoid confusion with tape-and-reel variants like DTR2G or different package types such as SOIC. Confirm manufacturer origin is onsemi for guaranteed specification adherence.

Selection Notes

Select this component when high-speed buffering with strong drive capability (24 mA) is required for 5V systems. The ACT series offers faster performance than standard AC/HC families while maintaining CMOS compatibility. The through-package design is critical for applications requiring compact routing between processor pins and peripheral buses.

Part Context

This device belongs to the MC74ACT541 family of octal buffers. It serves as the non-inverting counterpart to the MC74AC540. Functionally similar to the MC74AC244 but distinguished by its through-package pinout, it is optimized for high-density digital logic applications requiring reliable signal integrity and bus isolation.

Replacement Considerations

MC74ACT541DTR2G: Same logical function and specifications, differing only in tape-and-reel packaging instead of tube.

FAQ

What is the input compatibility of the MC74ACT541DTG?

The inputs are TTL-compatible, allowing direct connection to TTL logic levels without external interface components.

How does the package design benefit circuit layout?

The through architecture positions inputs and outputs on opposite sides of the 20-TSSOP package, simplifying trace routing and increasing PCB density.