74ACT240TTR

Buffers, Drivers, Receivers, Transceivers Overview

The STMicroelectronics 74ACT240TTR is an octal bus buffer with inverted 3-state outputs, fabricated using advanced sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 4.5V to 5.5V. The device features high-speed performance with a typical propagation delay of 5ns at VCC = 5V and low power dissipation, with a maximum quiescent current of 4μA at 25°C. Outputs provide symmetrical drive capability of 24mA minimum for both sourcing and sinking currents. It includes protection circuits against static discharge, offering 2kV ESD immunity.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Advanced high-speed CMOS fabrication utilizing sub-micron silicon gate and double-layer metal wiring C2MOS technology
• Inverting 3-state outputs designed for memory address drivers and bus-oriented transmission applications
• Direct interface compatibility with TTL, NMOS, and High-Speed CMOS systems
• Integrated protection circuits providing 2kV ESD immunity against static discharge and transient excess voltage

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus oriented transmitters or receivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific TSSOP-20 package configuration corresponding to the 'TTR' suffix before procurement. Confirm that the operating environment remains within the specified -55°C to +125°C temperature range and that the supply voltage strictly adheres to the 4.5V to 5.5V limits. Ensure proper handling procedures are followed due to the sensitivity of CMOS inputs to electrostatic discharge despite the integrated protection.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal inverting buffer with 3-state control is required for high-density PC board designs. It is suitable for interfacing between High-Speed CMOS systems and TTL-compatible logic levels. Consider its improved latch-up immunity and balanced propagation delays for applications requiring reliable signal integrity and noise tolerance in digital bus architectures.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ACT series of advanced high-speed CMOS logic functions. The 74ACT240 specifically provides eight independent buffers with separate output enable controls for two groups of four outputs each. It maintains pin and function compatibility with the standard 74 Series 240 while offering superior speed and lower power consumption characteristics inherent to the ACT family technology.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Compatible replacements include other manufacturers' 74ACT240 variants such as those from Fairchild Semiconductor or ON Semiconductor, provided they maintain identical pinouts and electrical specifications. Verify that any substitute device supports the same TSSOP-20 packaging and meets the required 3-state output functionality and voltage ranges.