The 54ACT240LMQBQS is an octal buffer/line driver with inverted 3-STATE outputs manufactured by Texas Instruments (formerly National Semiconductor). It belongs to the 54ACT family, known for its advanced CMOS technology, combining the speed of bipolar logic with the low power consumption of CMOS. This device is designed for applications requiring high-speed, buffered outputs with inverted logic.

Applications

• Memory address drivers
• Clock drivers (with inversion)
• Line transceivers (with inversion)
• High-speed data transmission
• Backplane driving

Features

• High-speed operation: Propagation delay is typically around 5ns.
• 3-STATE outputs: Allows for connection to a bus without loading it when disabled.
• Inverted outputs: Provides an inverted version of the input signal.
• Low power consumption: Characteristic of the ACT family.
• High output drive capability: Can drive multiple loads.
• Wide operating voltage range: Typically 4.5V to 5.5V.

Benefits

• Improved system performance: High-speed operation reduces delays in digital circuits.
• Increased system flexibility: 3-STATE outputs allow multiple devices to share a common bus.
• Reduced power consumption: Low power requirements lead to more efficient designs.
• Enhanced signal integrity: High output drive capability ensures reliable signal transmission.
• Simplified system design: The octal configuration simplifies interfacing with microprocessors and memory.

Additional Details

The 54ACT240LMQBQS comes in a surface-mount package. The device features eight independent buffer/line driver circuits. Each buffer has an inverted 3-STATE output, which can be enabled or disabled via an output enable (OE) input. When the OE input is low, the output is in a high-impedance state, effectively disconnecting the buffer from the bus. When OE is high, the output is enabled, and the buffer passes the inverted input signal to the output. It operates over a temperature range of -55°C to +125°C, making it suitable for military and aerospace applications. The 'Q' and 'S' suffixes likely denote specific quality and screening levels.