MM74HCT74N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: High-Speed, TTL-Compatible, Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: DIP (Dual In-Line Package)
• Essence: The MM74HCT74N is a versatile flip-flop IC that can store and transfer binary information. It is widely used in digital electronics for various applications.
• Packaging/Quantity: Available in tubes or reels, with 25 pieces per tube/reel.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HCT (High-Speed CMOS)
• Number of Flip-Flops: 2
• Trigger Type: Positive Edge-Triggered
• Clock Frequency: Up to 25 MHz
• Output Current: ±4mA
• Propagation Delay: 15 ns (max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MM74HCT74N has a total of 14 pins, which are assigned specific functions as follows:

1. CLR (Clear Input): Resets the flip-flop when set to low.
2. D1 (Data Input 1): First data input for the flip-flop.
3. CLK (Clock Input): Clock signal input for triggering the flip-flop.
4. D2 (Data Input 2): Second data input for the flip-flop.
5. Q1 (Output 1): Output for the first flip-flop.
6. Q1' (Complementary Output 1): Complementary output for the first flip-flop.
7. GND (Ground): Ground reference for the IC.
8. Q2 (Output 2): Output for the second flip-flop.
9. Q2' (Complementary Output 2): Complementary output for the second flip-flop.
10. PRE (Preset Input): Sets the flip-flop to a specific state when set to low.
11. PRD (Preset Enable Input): Enables the preset function when set to low.
12. VCC (Supply Voltage): Positive supply voltage for the IC.
13. SET (Set Input): Sets the flip-flop to a specific state when set to low.
14. SED (Set Enable Input): Enables the set function when set to low.

Functional Features

• Dual D-Type Flip-Flop: The MM74HCT74N consists of two independent D-type flip-flops, allowing for simultaneous storage and transfer of binary data.
• High-Speed Operation: With a maximum clock frequency of 25 MHz, this IC is suitable for high-speed digital applications.
• TTL-Compatible Inputs: The HCT logic family ensures compatibility with TTL (Transistor-Transistor Logic) inputs, making it easy to integrate into existing systems.
• Clear and Set Functions: The clear and set inputs provide control over the initial state of the flip-flops, allowing for flexible operation.
• Complementary Outputs: The complementary outputs provide inverted versions of the main outputs, expanding the range of possible applications.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data processing.
• Compatibility with TTL inputs simplifies integration into existing systems.
• Versatile clear and set functions offer flexibility in operation.
• Complementary outputs provide additional design options.

Disadvantages

• Limited number of flip-flops per IC (only two in the MM74HCT74N).
• Requires external components for complete circuit implementation.
• Not suitable for applications requiring a large number of flip-flops.

Working Principles

The MM74HCT74N operates based on the principles of positive-edge-triggered D-type flip-flops. When a rising edge is detected on the clock input (CLK), the data present at the D1 and D2 inputs is transferred to the Q1 and Q2 outputs, respectively. The clear (CLR) and set (SET) inputs allow for specific states to be set or cleared, while the complementary outputs (Q1', Q2') provide inverted versions of the main outputs (Q1, Q2).

Detailed Application Field Plans

The MM74HCT74N can be used in various digital applications, including:

1. Sequential Logic Circuits: It can be employed in sequential logic circuits such as counters, shift registers, and frequency dividers.
2. Data Storage Systems: The flip-flop functionality makes it suitable for use in memory systems, where binary data needs to be stored and retrieved.
3. Digital Communication Systems: It can be utilized in digital communication systems for signal synchronization and data processing. 4