CD74HC109M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic
• Characteristics: Dual J-K Flip-Flop with Clear and Preset, High-Speed CMOS Logic
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HC109M is a dual J-K flip-flop IC that can store and manipulate digital information. It is designed for high-speed operation and is part of the HC (High-Speed CMOS) logic family.
• Packaging/Quantity: The CD74HC109M is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC (High-Speed CMOS)
• Number of Flip-Flops: 2
• Clock Trigger Type: Positive Edge-Triggered
• Input Type: Schmitt Trigger
• Output Type: Standard
• Propagation Delay: 14 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The CD74HC109M has a total of 16 pins, which are assigned specific functions as follows:

1. CLR (Clear Input 1)
2. CLK (Clock Input 1)
3. PR (Preset Input 1)
4. Q1 (Flip-Flop 1 Output)
5. Q̅1 (Complementary Output of Flip-Flop 1)
6. GND (Ground)
7. Q̅2 (Complementary Output of Flip-Flop 2)
8. Q2 (Flip-Flop 2 Output)
9. VCC (Positive Power Supply)
10. D (Data Input)
11. CP (Clock Pulse Input)
12. PR (Preset Input 2)
13. CLR (Clear Input 2)
14. Q̅2 (Complementary Output of Flip-Flop 2)
15. Q2 (Flip-Flop 2 Output)
16. VCC (Positive Power Supply)

Functional Features

• Dual J-K flip-flops with independent clock, clear, and preset inputs.
• High-speed operation suitable for various digital logic applications.
• Schmitt trigger input allows for improved noise immunity.
• Wide operating voltage range provides flexibility in different power supply configurations.
• Compact SOIC package enables space-efficient circuit designs.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data processing. - Independent clock, clear, and preset inputs provide flexibility in controlling the flip-flops. - Schmitt trigger input enhances noise immunity, ensuring reliable operation. - Wide operating voltage range accommodates different power supply configurations. - Compact SOIC package saves space in circuit designs.

Disadvantages: - Limited number of flip-flops (2) may not be sufficient for complex applications requiring more storage elements. - The CD74HC109M is part of the HC logic family, which may have higher power consumption compared to other low-power logic families.

Working Principles

The CD74HC109M operates based on the principles of J-K flip-flops. Each flip-flop has two inputs: J (set) and K (reset). The state of the flip-flop is determined by the combination of these inputs and the clock signal. When the clock signal transitions from low to high (positive edge), the flip-flop captures the state of the J and K inputs and stores it until the next clock transition.

The clear (CLR) and preset (PR) inputs allow for additional control over the flip-flops. The CLR input clears the stored information, while the PR input sets the flip-flop to a predefined state. These inputs can be used to initialize the flip-flops or force them into specific states.

Detailed Application Field Plans

The CD74HC109M is commonly used in various digital logic applications, including but not limited to:

1. Counters and frequency dividers
2. Shift registers
3. Data storage and retrieval systems
4. Synchronous data transfer circuits
5. Control and sequencing circuits
6. Address decoding circuits
7. Clock synchronization circuits

Its high-speed operation, independent control inputs, and compact package make it suitable for these applications where efficient and reliable digital information processing is required.

Detailed and Complete Alternative Models

• SN74HC109: Similar dual J-K flip-flop IC from Texas Instruments.
• MC74HC109: Dual J-K flip-flop IC from ON Semiconductor.
• 74HCT109: Dual J-K flip-flop IC with TTL-compatible inputs.

These alternative models offer similar functionality and can be used as replacements for the CD74HC109M depending on specific requirements and availability.

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