STMicroelectronics 74VHC574 Octal D-Type Flip-Flop with 3-STATE Outputs

The 74VHC574 from STMicroelectronics is a high-speed CMOS device that incorporates the octal D-type flip-flop with 3-STATE output control. This integrated circuit is designed to be used in applications where the need for high-speed data storage, efficient data transfer, and bus-oriented systems is paramount. The 74VHC574 is part of the VHC family, which is known for its low power consumption and high noise immunity, making it an excellent choice for interfacing with high-speed logic systems.

The device features eight edge-triggered flip-flops with individual D-type inputs and 3-STATE true outputs. The flip-flops will store the state of their individual D-inputs that meet the set-up and hold time requirements on the LOW-to-HIGH clock (CLK) transition. A buffered output enable (OE) input can be used to place the eight outputs in either a normal logic state or a high-impedance state. When OE is LOW, the outputs function normally; when OE is HIGH, the outputs are in a high-impedance state, which is effectively off, allowing for shared bus lines without conflict.

The device operates from a 2.0V to 5.5V power supply, making it compatible with a variety of logic families. The 74VHC574 also features fast propagation delay times and high current drive capability at the outputs (±8mA at 5V), which is beneficial for driving heavier loads. Additionally, the inputs are designed with hysteresis, which increases the device's tolerance to slower input rise and fall times.

STMicroelectronics has packaged the 74VHC574 in several options, including the popular 20-pin plastic SOIC and TSSOP packages, which are suitable for surface-mount technology (SMT). This makes the device a versatile solution for modern PCB designs where space-saving and high-density packing are required.

Overall, the 74VHC574 is a reliable and efficient choice for designers looking to implement a robust octal flip-flop in their digital systems. Its compatibility with various logic levels, combined with its power-saving features and high-speed operation, make it a versatile component in a wide range of electronic applications.