Texas Instruments

SN74AS109ADR

SN74AS109ADR Description

The SN74AS109ADR is a dual JK flip-flop integrated circuit (IC) designed by Texas Instruments, featuring a set (preset) and reset function. This logic IC chip is part of the 74AS series and is housed in a 16-pin SOIC surface-mount package. The SN74AS109ADR operates within a supply voltage range of 4.5V to 5.5V and supports a clock frequency of up to 105 MHz, making it suitable for high-speed applications. Each flip-flop element within the IC is capable of handling 1 bit of data and is triggered on the positive edge of the clock signal. The output type is complementary, providing both true and complement outputs for each flip-flop.

SN74AS109ADR Features

• High-Speed Performance: With a maximum propagation delay of 9ns at 5V and 50pF, the SN74AS109ADR ensures fast signal processing, making it ideal for applications requiring rapid data handling.
• Low Quiescent Current: The IC consumes only 17 mA in quiescent mode, which is beneficial for power-sensitive applications.
• Robust Output Current Capability: The SN74AS109ADR can source 2mA and sink 20mA, providing sufficient drive capability for various load conditions.
• Complementary Outputs: The complementary output type allows for versatile signal handling and can be used in applications requiring both true and complement signals.
• Set (Preset) and Reset Functionality: This feature enables the flip-flops to be set or reset independently, offering flexibility in digital circuit design.
• RoHS3 Compliant and REACH Unaffected: The SN74AS109ADR meets environmental standards, ensuring it is suitable for use in regions with strict environmental regulations.
• Moisture Sensitivity Level (MSL) 1: The unlimited MSL rating means the IC can be stored and handled without special moisture protection, simplifying inventory management and assembly processes.
• Operating Temperature Range: The IC operates reliably within a temperature range of 0°C to 70°C (TA), making it suitable for a wide range of ambient conditions.

SN74AS109ADR Applications

The SN74AS109ADR is well-suited for a variety of applications due to its high-speed performance, low power consumption, and versatile output capabilities. Some specific use cases include:

• Digital Signal Processing: The high clock frequency and low propagation delay make it ideal for processing digital signals in real-time applications.
• Data Storage and Memory Management: The set (preset) and reset functions, along with complementary outputs, are useful for managing data storage and memory circuits.
• Clock and Timing Circuits: The positive edge triggering and complementary outputs are beneficial for designing precise clock and timing circuits.
• Control Logic in Embedded Systems: The low quiescent current and robust output current capability make it suitable for control logic in embedded systems where power efficiency and reliability are critical.

Conclusion of SN74AS109ADR

The SN74AS109ADR is a high-performance dual JK flip-flop IC that offers significant advantages over similar models due to its high-speed operation, low power consumption, and versatile output capabilities. Its set (preset) and reset functions, along with complementary outputs, provide flexibility in digital circuit design. The IC's compliance with environmental standards and its unlimited moisture sensitivity level further enhance its usability in various applications. While the product is now obsolete, its technical specifications and performance benefits make it a reliable choice for existing designs and legacy systems. For new projects, engineers may consider exploring alternative models with similar or enhanced features.