STMicroelectronics

74AC74TTR

74AC74TTR Description

The 74AC74TTR is a dual D-type flip-flop IC designed for high-speed digital logic applications. Manufactured by STMicroelectronics, this device belongs to the 74AC series and is housed in a 14-pin TSSOP package, suitable for surface-mount applications. Despite being marked as obsolete, the 74AC74TTR remains a reliable choice for various digital circuits due to its robust performance and wide operating voltage range of 2V to 6V.

74AC74TTR Features

• High-Speed Operation: With a clock frequency capability of up to 300 MHz, the 74AC74TTR ensures fast data processing and minimal latency, making it ideal for high-speed digital systems.
• Complementary Outputs: The device offers complementary outputs, providing both true and inverted outputs for versatile signal handling.
• Positive Edge Triggering: The 74AC74TTR is triggered on the positive edge of the clock signal, ensuring precise timing control and synchronization in digital circuits.
• Low Power Consumption: The IC features a quiescent current of only 2 µA, making it energy-efficient and suitable for low-power applications.
• Wide Operating Voltage Range: The device operates within a voltage range of 2V to 6V, providing flexibility in power supply requirements.
• High Output Current Capability: With an output current capability of 24mA for both high and low states, the 74AC74TTR can drive multiple loads without the need for additional buffering.
• Set and Reset Functionality: The IC includes set (preset) and reset functions, allowing for easy initialization and control of the flip-flop states.
• Low Propagation Delay: The maximum propagation delay is 10ns at 5V with a maximum capacitive load of 50pF, ensuring fast signal propagation and minimal delay.
• Compliance and Reliability: The 74AC74TTR is REACH unaffected and ROHS3 compliant, ensuring it meets environmental and safety standards. Additionally, its moisture sensitivity level (MSL) is 1 (unlimited), making it suitable for various environmental conditions.

74AC74TTR Applications

The 74AC74TTR is well-suited for a variety of applications due to its high-speed operation, low power consumption, and versatile functionality. Some specific use cases include:

• Digital Clock Circuits: The positive edge triggering and complementary outputs make it ideal for generating and managing clock signals in digital systems.
• Data Latching: The dual D-type flip-flops can be used for latching data in memory circuits, ensuring data integrity and synchronization.
• Frequency Dividers: The device can be employed in frequency division applications, where precise timing and control are essential.
• Sequential Logic Circuits: The set and reset functions, along with the dual flip-flops, make it suitable for designing complex sequential logic circuits.
• Communication Systems: The high-speed operation and low propagation delay make it suitable for high-speed data transmission and communication protocols.

Conclusion of 74AC74TTR

The 74AC74TTR, despite its obsolete status, remains a valuable component in the electronics industry due to its high-speed performance, low power consumption, and versatile functionality. Its wide operating voltage range, high output current capability, and compliance with environmental standards further enhance its appeal. While newer alternatives may exist, the 74AC74TTR continues to be a reliable choice for applications requiring dual D-type flip-flops with set and reset capabilities. Its robust performance and compatibility with various digital systems make it an ideal solution for engineers and designers working on high-speed digital circuits.