MC74ACT541DTR2G

Overview

The MC74ACT541DTR2G is an octal buffer and line driver from the 74ACT logic family, manufactured by onsemi. It features eight non-inverting inputs with three-state outputs housed in a 20-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, output drive currents of ±24 mA, and a maximum power dissipation of 200 mW. It supports surface-mount installation and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides eight non-inverting signal paths with three-state output capability for bus isolation.
• Features TTL-compatible inputs allowing direct interfacing with standard TTL logic circuits.
• Utilizes a through-pin architecture where inputs and outputs are located on opposite sides of the package to facilitate microprocessor interface design.

Applications

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

Procurement Notes

Verify the specific suffix 'DTR2G' confirms the TSSOP-20 package and reel packaging format. Ensure the order matches the 74ACT series requirements for 5V operation rather than the broader AC series. Confirm RoHS compliance status via the manufacturer's latest material declaration document before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring octal buffering with high-speed performance at 5V logic levels. The 74ACT series offers faster switching speeds compared to standard 74HC devices while maintaining TTL input compatibility. Consider the 20-TSSOP package constraints and thermal dissipation limits if multiple units operate simultaneously in dense layouts.

Part Context

This part belongs to the MC74ACT541 family of octal buffers. It serves as the non-inverting counterpart to the MC74ACT540. The device is designed for high-density PCB applications due to its pinout arrangement, which aligns inputs and outputs on opposite edges, simplifying trace routing for parallel data buses in embedded systems.

Replacement Considerations

MC74AC541DTR2G (AC series, wider voltage range)

FAQ

What is the difference between MC74ACT541 and MC74AC541?

The MC74ACT541 operates strictly at 5V with TTL-compatible inputs, whereas the MC74AC541 supports a wider voltage range of 2V to 6V but lacks TTL input compatibility.

How does the three-state output function work?

When the output enable (OE) signals are active low, the outputs follow the inputs. When OE is high, the outputs enter a high-impedance state, effectively disconnecting them from the bus.