The 74LVTH2245SJ is an octal transceiver with 3-STATE outputs manufactured by Fairchild/ON Semiconductor. This device is designed for bidirectional asynchronous communication between data buses. It features low voltage operation, high-speed performance, and low noise, making it suitable for a wide range of applications including memory interfacing, data bus buffering, and general-purpose logic circuits. The transceiver is characterized by its ability to drive heavily loaded buses with minimal signal degradation.

Applications

• Memory interfacing: Buffering data between memory and processors.
• Data bus buffering: Isolating and driving heavily loaded data buses.
• Address decoding: Multiplexing and demultiplexing address lines.
• Backplane transceivers: Driving signals across backplanes in computer systems.
• General-purpose logic: Implementing logic functions in digital systems.

Features

• Octal Transceiver: Eight bidirectional channels for data transmission.
• 3-STATE Outputs: Allows for bus isolation when the device is disabled.
• Low Voltage Operation: Operates at 3.3V, compatible with low-voltage logic systems.
• High-Speed Performance: Fast propagation delays for high-speed data transfer.
• Low Noise: Minimizes noise generation for clean signal transmission.
• TTL Compatible Inputs: Interfaces seamlessly with TTL logic levels.

Benefits

• Bidirectional Communication: Enables data transfer in both directions between buses.
• Bus Isolation: Prevents signal contention and loading on the bus.
• Low Power Consumption: Reduces power dissipation in low-voltage systems.
• Fast Data Transfer: Minimizes delays for high-speed applications.
• Reliable Performance: Provides stable and consistent operation in digital systems.
• Easy Integration: TTL-compatible inputs simplify interfacing with other logic devices.

Additional Details

The 74LVTH2245SJ features a direction control input (DIR) that determines the direction of data flow. When DIR is HIGH, data flows from A to B; when DIR is LOW, data flows from B to A. The output enable input (OE) controls the 3-STATE outputs. When OE is LOW, the outputs are enabled; when OE is HIGH, the outputs are in a high-impedance state. The transceiver operates at a supply voltage of 3.3V and is available in a surface-mount package. Its high drive capability and low noise make it suitable for driving heavily loaded buses in high-performance digital systems. Typical propagation delay is in the range of 4-6ns.