M74HCT541B1R

Overview

The M74HCT541B1R is an octal bus buffer with three-state outputs, manufactured by STMicroelectronics. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature from -55°C to 125°C. The device features a typical propagation delay of 14ns at 4.5V, symmetrical output impedance with minimum drive currents of 6mA for both high and low states, and a maximum quiescent supply current of 4μA at 25°C. It utilizes silicon gate C2MOS technology and is housed in a 20-DIP package.

Feature Summary

• Non-inverting octal bus buffer design
• Three-state control functionality via dual enable inputs
• Direct interface compatibility with TTL and NMOS components
• Input protection against static discharge and transient excess voltage

Applications

• High-speed CMOS systems interfacing with TTL components
• PC board layout optimization utilizing opposite-side input/output pinout
• Bus driver applications requiring balanced propagation delays

Procurement Notes

Verify component status as the M74HCT541B1R is listed as obsolete. Confirm availability through authorized distributors or secondary markets. Ensure that replacement parts maintain functional and pin compatibility if sourcing alternatives is necessary for ongoing production or maintenance requirements.

Selection Notes

Select this component for designs requiring non-inverted buffering between HSC2MOS systems and legacy TTL or NMOS logic families. Consider the wide operating temperature range and robust input protection features for harsh environments. Evaluate the 20-DIP package constraints against available PCB real estate and mounting requirements.

Part Context

This part belongs to the 74HCT series of advanced high-speed CMOS logic devices. It is functionally compatible with the standard 74LS541 series while offering lower power dissipation and higher noise immunity characteristic of CMOS technology. The specific suffix indicates the DIP tube packaging configuration.

Replacement Considerations

Public confirmed substitute part numbers include CD74HCT541E and SN74HCT541N.