The 74HCT640 from NXP Semiconductors is a high-speed Si-gate CMOS device and is pin compatible with low power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A. The 74HCT640 is an octal bus transceiver designed with two separate input-output ports (A and B) to facilitate bidirectional communication. Each port is equipped with a direction control pin (DIR) that manages the direction of data flow, and an output enable pin (OE) that can disable the output to achieve a high-impedance state.

Key Features

• Logic Type: Octal Bus Transceiver with 3-state outputs
• Operating Voltage: 4.5V to 5.5V
• Compatibility: Input levels are TTL compatible
• Current - Output High, Low: 7.8mA, 6.8mA
• Propagation Delay Time: 8ns (max) at 4.5V
• Temperature Operating Range: -40°C to 125°C
• Mounting Type: Through Hole or Surface Mount
• Package / Case: Offered in various packages, including DIP and SOIC

Applications

The 74HCT640 is suitable for a wide range of applications that require bidirectional data communication or multi-point bus transmission. Its ability to switch between sending and receiving on each bus makes it ideal for shared data bus applications, such as:

• Bus Interface in Microprocessor/Microcontroller Systems
• Data Communication Lines
• Peripheral Drivers
• Buffer Memory Addressing

Quality and Reliability

NXP Semiconductors is committed to delivering products of the highest quality and reliability. The 74HCT640 transceiver is no exception, with rigorous testing and adherence to stringent industry standards ensuring optimal performance in demanding environments.

Environmental Information

The 74HCT640 complies with the RoHS directive, which restricts the use of certain hazardous substances in electrical and electronic equipment. This commitment to environmental stewardship makes the 74HCT640 an ideal choice for eco-conscious businesses and applications.