Product Overview: 74HCT74D from NXP Semiconductors

The 74HCT74D is a high-speed Si-gate CMOS device from NXP Semiconductors, renowned for its robust performance and versatility. This dual positive-edge triggered D-type flip-flop is designed to integrate seamlessly into a wide range of digital circuits. It comes in a standard SO14 package, which is suitable for surface-mounted design applications.

The 74HCT74D is part of the 74HCT family, which means it is compatible with TTL levels, allowing for easy interfacing with older TTL logic while providing the benefits of CMOS technology, such as reduced power consumption and increased noise immunity. This makes the 74HCT74D an ideal choice for interfacing applications and for transitioning legacy systems to more modern digital designs.

Each flip-flop has independent data (D), set (SD), reset (RD), clock (CP) inputs, and outputs (Q and Q̅). The set and reset are asynchronous active LOW inputs and operate independently of the clock input. The clear and preset features make the device highly flexible and suitable for a broad range of applications, including counters, registers, and toggle circuits.

The 74HCT74D operates with a power supply voltage range of 4.5V to 5.5V, which is typical for 5V digital systems. Its low power consumption and high noise immunity are characteristics of the CMOS technology, making the device reliable in noisy environments. The device also features a maximum clock frequency of 74 MHz, providing the speed needed for high-performance digital systems.

The output capability is both standard and bus hold. This feature helps to maintain the last valid input state when no input is present, reducing the need for external pull-up or pull-down resistors. The device is also characterized for operation from -40°C to +125°C, ensuring reliability across a broad range of environmental conditions.

In summary, the NXP 74HCT74D is a versatile and reliable component for any digital logic circuit requiring flip-flops. Its compatibility with TTL logic levels, combined with the benefits of CMOS technology, makes it a popular choice for modern digital design projects.