DM74S74N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: 14-Pin Plastic Dual In-Line Package (DIP)
• Essence: The DM74S74N is a dual flip-flop IC that can store and transfer binary data. It is widely used in digital electronics for various applications.
• Packaging/Quantity: The DM74S74N is typically sold in packs of 10 or more.

Specifications

• Supply Voltage: 5V
• Logic Family: TTL (Transistor-Transistor Logic)
• Number of Flip-Flops: 2
• Trigger Type: Positive-Edge-Triggered
• Clock Input: Single Clock Pulse
• Output Type: Standard TTL Output
• Propagation Delay: 15 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The DM74S74N has a total of 14 pins, each serving a specific purpose. Here is the detailed pin configuration:

1. CLR (Clear) - Active LOW input for clearing the flip-flop.
2. D1 (Data Input 1) - Data input for the first flip-flop.
3. CLK (Clock) - Clock input for triggering the flip-flop.
4. D2 (Data Input 2) - Data input for the second flip-flop.
5. PR (Preset) - Active LOW input for presetting the flip-flop.
6. Q1 (Output 1) - Output of the first flip-flop.
7. Q1' (Complementary Output 1) - Complementary output of the first flip-flop.
8. GND (Ground) - Ground reference for the IC.
9. Q2' (Complementary Output 2) - Complementary output of the second flip-flop.
10. Q2 (Output 2) - Output of the second flip-flop.
11. VCC (Positive Power Supply) - Positive power supply for the IC.
12. NC (No Connection) - No electrical connection.
13. NC (No Connection) - No electrical connection.
14. NC (No Connection) - No electrical connection.

Functional Features

• Dual flip-flop design allows independent storage and transfer of data in two separate circuits.
• Positive-edge-triggered operation ensures reliable and synchronized data transfer.
• Clear and preset inputs provide additional control over the flip-flop states.
• Standard TTL output compatibility enables easy integration with other digital logic circuits.
• Low propagation delay ensures fast and efficient data processing.

Advantages and Disadvantages

Advantages: - Dual flip-flop configuration provides flexibility in designing complex digital systems. - Positive-edge triggering ensures accurate synchronization of data. - Compatible with standard TTL logic levels, making it widely usable. - Low propagation delay enhances overall system performance.

Disadvantages: - Limited to a maximum supply voltage of 5V. - Not suitable for applications requiring high-speed operation. - Relatively larger package size compared to modern surface-mount ICs.

Working Principles

The DM74S74N operates based on the principles of positive-edge-triggered flip-flops. When a rising edge is detected at the clock input (CLK), the data present at the D1 and D2 inputs are transferred to the respective flip-flops. The stored data can be accessed through the Q1, Q1', Q2, and Q2' outputs. The CLR and PR inputs allow for clearing and presetting the flip-flop states, respectively.

Detailed Application Field Plans

The DM74S74N finds applications in various digital systems, including but not limited to:

1. Sequential logic circuits
2. Data storage and transfer systems
3. Counters and frequency dividers
4. State machines and control units
5. Digital communication systems

Detailed and Complete Alternative Models

• SN74LS74AN: Dual D-Type Positive-Edge-Triggered Flip-Flop (TTL Logic)
• CD4013BE: Dual D-Type Flip-Flop (CMOS Logic)
• MC74HC74AN: Dual D-Type Flip-Flop with Clear (High-Speed CMOS Logic)

These alternative models offer similar functionality to the DM74S74N and can be used as replacements depending on specific requirements.

In conclusion, the DM74S74N is a dual flip-flop IC that provides reliable data storage and transfer capabilities. Its positive-edge-triggered operation, compatibility with standard TTL logic levels, and flexibility make it suitable for various digital applications. However, its limitations include a maximum supply voltage of 5V and slower speed compared to modern alternatives.