SN74S74N

Product Overview

• Category: Integrated Circuit
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: PDIP (Plastic Dual-In-Line Package)
• Essence: Logic Gates
• Packaging/Quantity: Tube/25 pieces

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• High-Level Input Voltage: 2V
• Low-Level Input Voltage: 0.8V
• High-Level Output Voltage: 2.7V
• Low-Level Output Voltage: 0.5V
• Maximum Operating Frequency: 30MHz
• Propagation Delay Time: 15ns
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74S74N has a total of 14 pins, which are numbered as follows:

1. CLR (Clear) - Active LOW input for clearing the flip-flop.
2. D1 (Data 1) - Data input for the first flip-flop.
3. CLK (Clock) - Clock input for the flip-flops.
4. D2 (Data 2) - Data input for the second flip-flop.
5. Q1 (Output 1) - Output of the first flip-flop.
6. Q1' (Complementary Output 1) - Complementary output of the first flip-flop.
7. GND (Ground) - Ground reference voltage.
8. Q2' (Complementary Output 2) - Complementary output of the second flip-flop.
9. Q2 (Output 2) - Output of the second flip-flop.
10. PRE (Preset) - Active LOW input for setting the flip-flop.
11. VCC (Supply Voltage) - Positive supply voltage.
12. PRD (Propagation Delay) - Output for measuring the propagation delay time.
13. GND (Ground) - Ground reference voltage.
14. VCC (Supply Voltage) - Positive supply voltage.

Functional Features

The SN74S74N is a dual D-type positive-edge-triggered flip-flop integrated circuit. It is designed to store and transfer data in digital systems. The flip-flop operates on the rising edge of the clock signal, capturing the input data and storing it in its internal memory. The stored data can then be accessed through the output pins.

Advantages and Disadvantages

Advantages: - Dual flip-flop configuration allows for efficient data storage and transfer. - Positive-edge triggering ensures reliable operation. - Wide operating temperature range (-40°C to +85°C) enables usage in various environments. - Low propagation delay time (15ns) facilitates high-speed applications.

Disadvantages: - Limited operating frequency (30MHz) may restrict its use in certain high-frequency applications. - Requires external components for proper functioning. - PDIP package may not be suitable for space-constrained designs.

Working Principles

The SN74S74N flip-flop works based on the principles of sequential logic. When the clock signal transitions from low to high (rising edge), the flip-flop captures the data present at the D1 and D2 inputs and stores it in its internal memory. The stored data is then available at the Q1 and Q2 outputs. The CLR and PRE inputs allow for clearing and presetting the flip-flop, respectively.

Detailed Application Field Plans

The SN74S74N flip-flop finds applications in various digital systems, including but not limited to: - Data storage and transfer in microprocessors and microcontrollers. - State machine design in digital circuits. - Synchronization and timing control in communication systems. - Register implementation in arithmetic and logic units. - Memory address decoding in memory systems.

Detailed and Complete Alternative Models

Some alternative models to the SN74S74N flip-flop include: - SN74LS74AN: Dual D-Type Positive-Edge-Triggered Flip-Flop with Schottky Diode-Clamped Inputs. - CD4013BE: Dual D-Type Flip-Flop with Set and Reset. - MC14013BCL: Dual Type D Flip-Flop.

These alternatives offer similar functionality but may have different specifications, pin configurations, or package options.

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