NXP 74LVT244BDB: 3V Octal Buffer/Line Driver with 3-State Outputs and Bus-Hold

The NXP 74LVT244BDB is a high-performance octal buffer and line driver designed for 3.3V VCC systems. This integrated circuit is a member of NXP's LVT (Low Voltage Technology) family, which is optimized for low-voltage operation while maintaining high-speed performance and robust interface capabilities. It is particularly well-suited for applications requiring buffering, signal isolation, or driving heavily loaded buses.

A key feature of this device is its eight non-inverting buffers with 3-state outputs. Each of the eight channels can independently control the flow of digital signals. The 3-state output capability allows the outputs to be put into a high-impedance state (Hi-Z), effectively disconnecting the output from the bus. This is essential for preventing bus contention in multi-point or shared bus architectures, such as those found in data communication systems, networking equipment, and computer peripherals.

Another significant advantage is the integrated bus-hold circuitry. This feature eliminates the need for external pull-up or pull-down resistors by weakly holding the last valid logic state on an input pin when it is left floating. This ensures a defined logic level is always present, which enhances system reliability, reduces component count, and simplifies board design.

The 74LVT244BDB is offered in a SSOP20 (Shrink Small Outline Package) which is ideal for space-constrained applications. It provides high drive capability (±32 mA output drive at 3V VCC) and is designed with very low quiescent power consumption. Furthermore, it features live insertion capability, making it a robust choice for hot-swappable and fault-tolerant systems.

ICGOOODFIND: The 74LVT244BDB is an excellent solution for 3.3V digital systems requiring high-speed, high-drive buffering with the critical benefits of 3-state outputs and integrated bus-hold to enhance signal integrity and design simplicity.

Keywords: 3.3V Logic, Octal Buffer, 3-State Outputs, Bus-Hold, SSOP20 Package.