SN74S74NSR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The SN74S74NSR is a dual flip-flop IC that can store and transfer data in digital circuits.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Logic Family: TTL (Transistor-Transistor Logic)
• Number of Flip-Flops: 2
• Trigger Type: Positive-Edge
• Clock Frequency: Up to 25 MHz
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74S74NSR has a total of 14 pins, which are assigned as follows:

1. CLR (Clear) - Active Low Clear Input
2. D1 (Data Input 1) - Data Input for Flip-Flop 1
3. CLK (Clock) - Clock Input
4. D2 (Data Input 2) - Data Input for Flip-Flop 2
5. Q1 (Output 1) - Output of Flip-Flop 1
6. Q1' (Complementary Output 1) - Complementary Output of Flip-Flop 1
7. GND (Ground) - Ground Reference
8. Q2' (Complementary Output 2) - Complementary Output of Flip-Flop 2
9. Q2 (Output 2) - Output of Flip-Flop 2
10. PRE (Preset) - Active Low Preset Input
11. PRD (Preset Enable) - Active Low Preset Enable Input
12. CLR (Clear Enable) - Active Low Clear Enable Input
13. VCC (Supply Voltage) - Positive Power Supply
14. PRD (Preset Disable) - Active Low Preset Disable Input

Functional Features

• Dual flip-flop design allows for independent storage and transfer of data in two separate circuits.
• Positive-edge triggering ensures that the flip-flops capture and store data on the rising edge of the clock signal.
• Clear and preset inputs provide control over the initial state of the flip-flops.
• Complementary outputs allow for easy integration with other digital logic circuits.

Advantages and Disadvantages

Advantages

• Dual flip-flop configuration provides flexibility in designing complex digital systems.
• Positive-edge triggering ensures reliable data capture.
• Wide operating temperature range allows for use in various environments.
• TTL logic family offers compatibility with other TTL-based ICs.

Disadvantages

• Limited number of flip-flops per IC may restrict the complexity of certain designs.
• Requires external components for proper operation, such as clock signal source and power supply.

Working Principles

The SN74S74NSR operates based on the principles of positive-edge-triggered flip-flops. When a rising edge is detected on the clock input, the data present at the D1 and D2 inputs are captured and stored in the respective flip-flops. The stored data can then be accessed through the Q1, Q1', Q2, and Q2' outputs. The clear and preset inputs allow for controlling the initial state of the flip-flops, while the complementary outputs facilitate integration with other digital circuits.

Detailed Application Field Plans

The SN74S74NSR is commonly used in various digital applications, including:

1. Sequential logic circuits
2. Data storage and transfer systems
3. Clock synchronization circuits
4. Register and counter designs
5. Microprocessor-based systems

Detailed and Complete Alternative Models

1. SN74LS74N: Dual D-Type Positive-Edge-Triggered Flip-Flop, Low Power Schottky TTL Logic Family.
2. CD4013BE: Dual D-Type Flip-Flop, CMOS Logic Family.
3. MC74HC74AN: Dual D-Type Flip-Flop, High-Speed CMOS Logic Family.

These alternative models offer similar functionality to the SN74S74NSR and can be used as replacements depending on specific design requirements.

In conclusion, the SN74S74NSR is a dual flip-flop IC belonging to the TTL logic family. It provides reliable data storage and transfer capabilities in digital circuits. With its positive-edge triggering, clear and preset inputs, and complementary outputs, it offers flexibility and compatibility for various applications. However, designers should consider the limited number of flip-flops per IC and the need for external components. Alternative models such as the SN74LS74N, CD4013BE, and MC74HC74AN can be considered based on specific design needs.