The 74AC574 is an advanced high-speed CMOS octal flip-flop with 3-state output, manufactured by STMicroelectronics. This integrated circuit is designed to be used in applications where high-speed, low-power consumption, and high noise immunity are required. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

The device consists of eight edge-triggered flip-flops with individual D-type inputs and 3-state 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 (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. Thus, the 74AC574 can be used for bus interfacing in multi-master buses.

Key features of the 74AC574 include:

• High-speed operation: t<sub>PD = 6ns (max) at V<sub>CC = 5V
• Power-down protection on inputs and outputs
• Low power dissipation: I<sub>CC = 4µA (max) at T<sub>A = 25°C
• 3-state outputs for bus-oriented applications
• Inputs and outputs on opposite sides of the package to facilitate board layout
• Guaranteed output skew to maintain signal integrity

The 74AC574 is fabricated using STMicroelectronics' robust CMOS technology, which provides the device with the inherent benefits of CMOS—low quiescent power and minimal power consumption without sacrificing speed. The device is available in a variety of packages, including DIP, SOIC, and TSSOP, making it versatile for various types of applications and design requirements.

Whether you are designing high-speed data paths in telecommunication systems, or need a reliable flip-flop for buffering data in computing environments, the 74AC574 from STMicroelectronics offers a perfect blend of speed, power efficiency, and reliability to meet your design needs.