74ACT541B

Buffers, Drivers, Receivers, Transceivers Overview

The STMicroelectronics 74ACT541B is an advanced high-speed CMOS octal bus buffer with three-state outputs. It operates within a supply voltage range of 4.5V to 5.5V and features symmetrical output impedance with minimum source/sink currents of 24mA. The device provides a typical propagation delay of 4ns at VCC = 5V and includes protection circuits offering 2kV ESD immunity. Designed for direct interfacing between High-Speed CMOS, TTL, NMOS, and CMOS systems, it supports 50Ω transmission line driving capabilities.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Advanced high-speed CMOS technology utilizing sub-micron silicon gate and double-layer metal wiring C2MOS process.
• Three-state control gate functions as two input AND gates; all eight outputs enter high-impedance state if either G1 or G2 is high.
• Pinout arrangement places inputs and outputs on opposite sides of the package to enhance printed circuit board layout density.
• Inputs and outputs equipped with static discharge protection circuits providing 2kV ESD immunity.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory and address drivers
• Clock drivers
• Bus-oriented transmitter/receivers
• Output ports for microprocessors

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the specific ordering code matches the required package type, as the 74ACT541B designation specifically corresponds to the DIP package variant in the official datasheet. Confirm compatibility with existing system voltage levels and logic families before integration. Ensure environmental operating conditions align with the specified temperature ranges for the intended application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interface compatibility between High-Speed CMOS and TTL/NMOS/CMOS systems is required. The balanced propagation delays and symmetrical output impedance make it suitable for applications demanding precise timing and signal integrity. Consider the through-hole DIP packaging constraints versus surface-mount alternatives like SOP or TSSOP based on board space requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the 74ACT series of octal bus buffers. It shares pin and function compatibility with the standard 74 Series 541 while offering improved latch-up immunity and higher speed performance due to its advanced CMOS fabrication technology. It serves as a non-inverting buffer solution for digital logic interfaces.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include other 74ACT541 variants from different manufacturers, provided they maintain identical pinouts and electrical specifications. Surface-mount equivalents such as the 74ACT541M (SOP) or 74ACT541TTR (TSSOP) offer functional parity but require different footprint considerations during PCB design adaptation.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the three-state control gate operate?

The three-state control gate operates as two input AND gates. If either G1 or G2 is high, all eight outputs are placed in the high-impedance state.

What is the purpose of the opposite-side pinout arrangement?

The inputs and outputs are located on opposite sides of the package to facilitate easier interface to microprocessors and enhance printed circuit board layout density.