ON Semiconductor MC74HCT245AN Octal Bus Transceiver

The ON Semiconductor MC74HCT245AN is a high-performance, octal bus transceiver integrated circuit designed for asynchronous communication between data buses. This device is compatible with industry-standard HCT logic and operates with a power supply range of 4.5V to 5.5V, making it suitable for interfacing with 5V logic systems.

The MC74HCT245AN features eight bidirectional input/output (I/O) ports (A1-A8 and B1-B8), which can transfer data from the A bus to the B bus or vice versa, depending on the logic level at the direction control (DIR) input. The output enable (OE) input, when held at a low logic level, enables the outputs and allows data to flow through the transceiver. Conversely, a high logic level at the OE input places the I/O ports in a high-impedance state, effectively disconnecting the bus lines.

This transceiver is characterized for operation from -55°C to +125°C, ensuring reliable performance across a wide range of environmental conditions. The MC74HCT245AN is provided in a 20-pin DIP (Dual In-line Package), which is conducive to easy insertion into standard breadboards and sockets for prototyping or into printed circuit boards for permanent installations.

Key features of the MC74HCT245AN include:

• Octal bidirectional switching for efficient bus management
• Logic level translation capability to interface between different logic levels
• High-impedance output state controlled by the OE input
• Latch-up performance meets 100mA per JESD 78, Class II
• ESD protection exceeds JESD 22

The MC74HCT245AN is ideal for use in data communication systems, microprocessor bus interfaces, and memory buffering applications, where reliable and efficient bidirectional data transfer is critical. Its robust design and compatibility with industry-standard logic levels make it a versatile choice for designers looking to implement bus transceiver functions in their electronic projects or commercial products.

Whether you're developing a new system or upgrading an existing one, the ON Semiconductor MC74HCT245AN offers the performance and reliability you need to ensure seamless data communication across your digital buses.