CD74HC74M

Product Overview

• Category: Integrated Circuit
• Use: Flip-Flop
• Characteristics:
  • High-Speed CMOS Logic
  • Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Reliable and efficient flip-flop integrated circuit
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Flip-Flops: 2
• Propagation Delay: 15 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HC74M has a total of 14 pins. The pin configuration is as follows:

1. CLR (Clear Input) - Active LOW input used to reset the flip-flop.
2. D (Data Input) - Input for the data to be stored in the flip-flop.
3. CLK (Clock Input) - Input for the clock signal that triggers the flip-flop.
4. Q (Output) - Output for the stored data.
5. Q̅ (Complementary Output) - Complementary output for the stored data.
6. GND (Ground) - Ground reference for the IC.
7. Q̅ (Complementary Output) - Complementary output for the stored data.
8. Q (Output) - Output for the stored data.
9. VCC (Positive Power Supply) - Positive power supply for the IC.
10. D (Data Input) - Input for the data to be stored in the flip-flop.
11. CLR (Clear Input) - Active LOW input used to reset the flip-flop.
12. CLK (Clock Input) - Input for the clock signal that triggers the flip-flop.
13. Q̅ (Complementary Output) - Complementary output for the stored data.
14. GND (Ground) - Ground reference for the IC.

Functional Features

• Dual D-Type Positive-Edge-Triggered Flip-Flop
• High-Speed CMOS Logic for efficient operation
• Clear input for easy reset of the flip-flop
• Clock input for synchronized data storage
• Complementary outputs for versatile applications

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick data processing. - Reliable and efficient flip-flop design ensures accurate data storage. - Compact SOIC package saves space in electronic circuits. - Wide operating temperature range enables usage in various environments.

Disadvantages: - Limited number of flip-flops per IC may restrict certain applications. - Requires external clock signal for proper functioning. - Not suitable for low voltage applications below 2V.

Working Principles

The CD74HC74M is a dual D-type positive-edge-triggered flip-flop. It stores data based on the rising edge of the clock signal. When the clock signal transitions from LOW to HIGH, the data present at the D input is transferred to the Q output. The complementary output, Q̅, represents the inverse of the stored data. The clear input (CLR) can be used to reset the flip-flop, setting both outputs to a known state.

Detailed Application Field Plans

The CD74HC74M is widely used in digital systems where reliable and synchronized data storage is required. Some common application fields include:

1. Digital Communication Systems: Used for data buffering and synchronization in communication protocols such as UART, SPI, and I2C.
2. Microcontroller and Microprocessor Systems: Employed for storing control signals, status flags, and intermediate data during program execution.
3. Digital Clocks and Timers: Utilized for storing time information and generating precise timing signals.
4. Memory Address Decoding: Used in memory address decoding circuits to enable specific memory locations based on control signals.
5. Sequential Logic Circuits: Integrated into sequential logic circuits like counters, shift registers, and state machines for data storage and manipulation.

Detailed and Complete Alternative Models

1. SN74HC74N: Similar dual D-type positive-edge-triggered flip-flop with a different package (DIP) and pin configuration.
2. CD4013BM: Dual D-type flip-flop with set and reset inputs, suitable for more complex sequential logic applications.
3. 74LS74: Dual D-type flip-flop with TTL logic family, compatible with older systems using TTL technology.

These alternative models provide similar functionality to the CD74HC74M and can be used as replacements depending on specific requirements.

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