Texas Instruments
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CD74AC109E
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CD74AC109E

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Flip-Flop
  • Characteristics: Dual JK Positive Edge-Triggered Flip-Flop with Clear and Preset
  • Package: 16-pin DIP (Dual In-line Package)
  • Essence: The CD74AC109E is a versatile flip-flop IC that can store and manipulate binary information in electronic circuits.
  • Packaging/Quantity: Available in reels or tubes, with 25 units per reel/tube.

Specifications

  • Supply Voltage Range: 2V to 6V
  • High-Level Input Voltage: 2V
  • Low-Level Input Voltage: 0.8V
  • High-Level Output Current: -24mA
  • Low-Level Output Current: 24mA
  • Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The CD74AC109E has a total of 16 pins, which are assigned specific functions:

  1. CLR (Clear) - Active LOW input for clearing the flip-flop.
  2. PR (Preset) - Active LOW input for setting the flip-flop.
  3. CP (Clock Pulse) - Positive edge-triggered clock input.
  4. J (Data Input J) - Input for J data.
  5. K (Data Input K) - Input for K data.
  6. Q (Output Q) - Output for Q data.
  7. Q̅ (Complementary Output Q̅) - Complementary output for Q data.
  8. GND (Ground) - Ground reference for the IC.
  9. Q̅ (Complementary Output Q̅) - Complementary output for Q data.
  10. Q (Output Q) - Output for Q data.
  11. K (Data Input K) - Input for K data.
  12. J (Data Input J) - Input for J data.
  13. CP (Clock Pulse) - Positive edge-triggered clock input.
  14. PR (Preset) - Active LOW input for setting the flip-flop.
  15. CLR (Clear) - Active LOW input for clearing the flip-flop.
  16. VCC (Supply Voltage) - Positive supply voltage for the IC.

Functional Features

  • Dual JK Flip-Flop: The CD74AC109E consists of two independent JK flip-flops, allowing for simultaneous storage and manipulation of two sets of binary information.
  • Positive Edge-Triggered: The flip-flop is triggered by a positive edge transition of the clock pulse, ensuring accurate timing and synchronization.
  • Clear and Preset Inputs: The clear (CLR) and preset (PR) inputs provide control over the initial state of the flip-flop, allowing for easy initialization.
  • High-Speed Operation: The CD74AC109E operates at high speeds, making it suitable for applications requiring rapid data processing.

Advantages and Disadvantages

Advantages: - Versatile functionality with dual flip-flops. - Accurate timing and synchronization with positive edge-triggering. - Easy initialization with clear and preset inputs. - High-speed operation for rapid data processing.

Disadvantages: - Limited to positive edge-triggering, may not be suitable for applications requiring negative edge-triggering. - Requires external components for power supply and interfacing.

Working Principles

The CD74AC109E operates based on the principles of JK flip-flops. It stores binary information using two inputs, J and K, which represent the desired data. The flip-flop is triggered by a positive edge transition of the clock pulse (CP), causing the stored data to be transferred to the outputs Q and Q̅. The clear (CLR) and preset (PR) inputs allow for initialization of the flip-flop's state. The IC operates at high speeds, making it suitable for various applications.

Detailed Application Field Plans

The CD74AC109E can be used in a wide range of applications, including:

  1. Digital Counters: The flip-flop's ability to store and manipulate binary information makes it ideal for use in digital counters, allowing for accurate counting and sequencing.
  2. Data Storage: The IC can be used to store data in electronic systems, such as registers or memory units.
  3. Synchronous Logic Circuits: The positive edge-triggered functionality of the flip-flop enables its use in synchronous logic circuits, ensuring proper timing and synchronization.
  4. Control Systems: The CD74AC109E can be employed in control systems to store and manipulate control signals, enabling precise control over various processes.

Detailed and Complete Alternative Models

  1. SN74LS109AN: Similar dual JK flip-flop IC with clear and preset inputs, operating at a lower voltage range (2V to 5.5V).
  2. MC74HC109N: Dual JK flip-flop IC with clear and preset inputs, operating at a higher voltage range (2V to

10 domande e risposte comuni relative all'applicazione di CD74AC109E nelle soluzioni tecniche

Sure! Here are 10 common questions and answers related to the application of CD74AC109E in technical solutions:

  1. Q: What is CD74AC109E? A: CD74AC109E is a dual positive-edge-triggered JK flip-flop integrated circuit (IC) that can be used in various digital applications.

  2. Q: What is the operating voltage range for CD74AC109E? A: CD74AC109E operates within a voltage range of 2V to 6V.

  3. Q: What is the maximum clock frequency supported by CD74AC109E? A: CD74AC109E can support clock frequencies up to 100 MHz.

  4. Q: How many flip-flops are present in CD74AC109E? A: CD74AC109E contains two independent JK flip-flops.

  5. Q: What is the purpose of the J and K inputs in CD74AC109E? A: The J and K inputs are used to control the state of the flip-flops. They determine whether the output will toggle, hold, or reset based on the clock input.

  6. Q: Can CD74AC109E be used for synchronous or asynchronous operation? A: CD74AC109E is designed for synchronous operation, meaning the outputs change only when the clock signal transitions from low to high.

  7. Q: What is the typical propagation delay of CD74AC109E? A: The typical propagation delay of CD74AC109E is around 8 ns.

  8. Q: Does CD74AC109E have any built-in preset or clear functionality? A: No, CD74AC109E does not have built-in preset or clear functionality. However, external logic can be used to achieve these functions.

  9. Q: Can CD74AC109E be cascaded to create larger counters or registers? A: Yes, CD74AC109E can be cascaded with other flip-flops to create larger counters or registers for more complex applications.

  10. Q: What are some common applications of CD74AC109E? A: CD74AC109E is commonly used in digital systems for tasks such as frequency division, data synchronization, counter circuits, and general-purpose flip-flop applications.

Please note that the answers provided here are general and may vary depending on specific circuit designs and requirements.