NXP 74LVT244APW: 3V Octal Buffer/Line Driver with 3-State Outputs and Bus-Hold
The NXP 74LVT244APW is a high-performance octal buffer and line driver designed for 3.3V VCC systems, making it a fundamental component in modern digital interfacing applications. This device is part of NXP's LVT (Low Voltage Technology) family, which is optimized for low-voltage operation while maintaining compatibility with 5V TTL levels, a critical feature for mixed-voltage environments.
Constructed with an octal architecture, the IC features eight non-inverting buffers/line drivers separated into two groups of four, each controlled by its own output enable (OE) input. The 3-state outputs allow the outputs to be put into a high-impedance state, enabling seamless connection to a bus-oriented system without risking data contention or excessive power dissipation. This is particularly valuable in multipoint bus applications such as memory address driving, data buses, and backplane interfaces.
A standout feature of the 74LVT244APW is its integrated bus-hold circuitry. This innovation eliminates the need for external pull-up or pull-down resistors by actively holding the last valid logic state on an input pin when it is left floating. This significantly simplifies board design, reduces component count, and enhances overall system reliability by preventing erratic behavior from undefined input levels.
Housed in a TSSOP-20 (PW) package, the device is suited for space-constrained PCB designs. It offers high drive capability (-32mA IOH / 64mA IOL), allowing it to drive heavily loaded lines while maintaining fast propagation delays, which is essential for meeting the timing requirements of high-speed systems.
ICGOOODFIND: The 74LVT244APW is an efficient and robust solution for digital signal buffering and driving, combining essential features like 3-state outputs and bus-hold in a single package to enhance signal integrity and simplify design in 3.3V systems.
Keywords: 3.3V Octal Buffer, 3-State Outputs, Bus-Hold, Line Driver, TSSOP-20 Package
