ON Semiconductor 74LCX16543MTD: Low Voltage 16-Bit Registered Transceiver

The 74LCX16543MTD from ON Semiconductor is a high-performance, low-voltage 16-bit registered transceiver with 3-state outputs designed to be used as an interface between a 3.3V bus and a 5V bus in a mixed 3.3V/5V supply environment. This product is part of the LCX family, which is characterized by its high-speed operation while maintaining the low power dissipation of CMOS technology.

This integrated circuit is equipped with two sets of eight D-type registers for temporary data storage, and it allows data transmission from the A bus to the B bus or vice versa, depending on the logic level at the direction control (DIR) inputs. The OE (Output Enable) inputs can disable the outputs, allowing the buses to go into a high-impedance state, thus preventing bus contention.

The 74LCX16543MTD operates at an extended voltage range of 2.3V to 3.6V, which provides compatibility with lower voltage systems and ensures a lower power consumption. It is also 5V tolerant on inputs, which allows for interface flexibility with traditional 5V logic signals. The device is capable of driving 24mA at the outputs, ensuring good signal integrity and fast rise and fall times, which is crucial for high-speed operation.

With its built-in power-up 3-state feature, the outputs are in the high-impedance state during power up or down, which prevents any erroneous glitching on the bus. The 74LCX16543MTD also includes bus-hold data inputs, which eliminate the need for external pull-up resistors to hold unused inputs, thus simplifying board design and reducing board space.

This product is available in a 48-pin TSSOP (Thin Shrink Small Outline Package) that offers a reduced footprint on PCBs, making it ideal for space-constrained applications. It is commonly used in telecommunications, computing, and industrial environments where low power and high-speed data transfer are required.

With its robust feature set and performance specifications, the ON Semiconductor 74LCX16543MTD registered transceiver is a reliable choice for designers looking to bridge between different voltage domains while maintaining signal integrity and speed.