STMicroelectronics

74ACT74TTR

74ACT74TTR Description

The 74ACT74TTR is a dual D-type flip-flop IC designed by STMicroelectronics, a leading manufacturer in the semiconductor industry. This logic IC chip is part of the 74ACT series and is housed in a 14-TSSOP surface-mount package, making it suitable for compact and high-density PCB designs. Despite its obsolescence, the 74ACT74TTR remains a reliable choice for various digital applications due to its robust performance and compatibility with standard TTL and CMOS logic levels.

74ACT74TTR Features

• Clock Frequency: The 74ACT74TTR operates at a clock frequency of up to 250 MHz, ensuring high-speed performance suitable for demanding digital circuits.
• Output Type: It features complementary outputs, providing both true and inverted signals, which can be advantageous in applications requiring multiple signal states.
• Trigger Type: The flip-flops are triggered on the positive edge of the clock signal, ensuring precise timing control and synchronization.
• Set and Reset Functionality: The IC includes set (preset) and reset functions, allowing for direct control over the flip-flop states, which is essential for initializing or resetting the system.
• Supply Voltage: It operates within a supply voltage range of 4.5V to 5.5V, ensuring compatibility with standard 5V digital systems.
• Input Capacitance: With an input capacitance of only 3 pF, the 74ACT74TTR minimizes signal propagation delays and power consumption.
• Propagation Delay: The maximum propagation delay is 10ns at 5V with a maximum load capacitance of 50pF, ensuring fast and reliable signal transmission.
• Low Quiescent Current: The IC has a low quiescent current of 4 µA, making it energy-efficient and suitable for low-power applications.
• Output Current Capability: It can source and sink up to 24mA per output, providing robust drive capabilities for various digital loads.
• Compliance and Packaging: The 74ACT74TTR is REACH unaffected and RoHS3 compliant, ensuring environmental safety and regulatory compliance. It is also available in a moisture sensitivity level (MSL) of 1, making it suitable for unlimited storage and handling.

74ACT74TTR Applications

The 74ACT74TTR is ideal for a wide range of digital applications, including:

• Digital Counters and Registers: Utilizing its dual D-type flip-flops, the IC can be used to build synchronous counters, shift registers, and other sequential logic circuits.
• Data Storage and Transfer: Its set and reset functions make it suitable for temporary data storage and controlled data transfer in digital systems.
• Timing and Control Circuits: The positive edge-triggered flip-flops can be employed in timing circuits, clock dividers, and control signal generation.
• Communication Systems: The high-speed operation and complementary outputs make it suitable for digital communication systems requiring precise signal timing and multiple signal states.

Conclusion of 74ACT74TTR

The 74ACT74TTR, despite being obsolete, remains a valuable component in the electronics industry due to its high-speed performance, versatile functionality, and compatibility with standard digital systems. Its dual D-type flip-flops, set and reset capabilities, and low power consumption make it an excellent choice for various digital applications. The robust output current capability and compliance with environmental regulations further enhance its appeal. While modern alternatives may offer additional features, the 74ACT74TTR continues to be a reliable and cost-effective solution for many digital circuit designs.