The 54ACT245LMQB/QS is an octal transceiver with three-state outputs manufactured by National Semiconductor (now Texas Instruments). It belongs to the Advanced CMOS Technology (ACT) family, offering a balance of high speed and low power consumption. This device is designed for asynchronous two-way communication between data buses and is commonly used in military and aerospace applications due to its wide operating temperature range and ruggedized packaging.

Applications:

• Military and aerospace systems
• Data bus transceiver in embedded systems
• Memory interfacing
• High-reliability applications
• Industrial control systems

Features:

• Octal transceiver: Handles 8 bits of data simultaneously.
• Three-state outputs: Allows outputs to be high, low, or high-impedance for bus isolation.
• High-speed operation: Provides fast propagation delays.
• Wide operating temperature range: Suitable for extreme environments.
• Low power consumption: Minimizes energy usage.
• Non-inverting: Retains the original data polarity.

Benefits:

• Reliable data transfer in harsh environments.
• Improved system performance due to high-speed operation.
• Reduced power consumption for extended battery life.
• Simplified bus interfacing with three-state outputs.

Additional Details:

The 54ACT245LMQB/QS operates from a 4.5V to 5.5V power supply. Key specifications include propagation delays in the nanosecond range and a wide operating temperature range, typically -55°C to +125°C. The device features a direction control (DIR) pin that determines the direction of data flow and an output enable (OE) pin that enables or disables the outputs. The LMQB/QS designation indicates a specific military-grade package. Consult the official Texas Instruments datasheet for detailed electrical characteristics, timing diagrams, and packaging information. Proper power supply bypassing is recommended for stable operation.