SN74F74DR

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: Digital Logic IC for storing and transferring binary data
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• 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: 100MHz
• Propagation Delay Time: 10ns
• Set-Up Time: 15ns
• Hold Time: 5ns

Detailed Pin Configuration

The SN74F74DR 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 the first flip-flop
3. CLK (Clock) - Clock input for both flip-flops
4. D2 (Data Input 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
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 preset input
11. PR' (Complementary Preset) - Complementary preset input
12. CLR' (Complementary Clear) - Complementary clear input
13. VCC (Positive Power Supply) - Positive power supply voltage
14. PR (Preset) - Active LOW preset input

Functional Features

• Dual D-Type Flip-Flop: The SN74F74DR consists of two independent D-type flip-flops, allowing for the storage and transfer of binary data.
• Positive-Edge Triggered: The flip-flops are triggered on the rising edge of the clock signal, ensuring synchronized data transfer.
• Asynchronous Clear and Preset Inputs: The clear and preset inputs allow for immediate resetting or setting of the flip-flop outputs, regardless of the clock signal.
• Complementary Outputs: The chip provides both normal and complementary outputs for each flip-flop, offering flexibility in circuit design.

Advantages and Disadvantages

Advantages: - Dual flip-flop configuration allows for efficient use of space and resources. - Positive-edge triggering ensures reliable and synchronized data transfer. - Asynchronous clear and preset inputs provide flexibility in controlling the flip-flop outputs. - Complementary outputs enable versatile circuit design.

Disadvantages: - Limited operating frequency compared to some newer flip-flop ICs. - Propagation delay time may impact timing-sensitive applications.

Working Principles

The SN74F74DR operates based on the principles of digital logic. It utilizes positive-edge triggering to capture and store data at the rising edge of the clock signal. The clear and preset inputs allow for immediate control over the flip-flop outputs, regardless of the clock state. The complementary outputs provide inverted versions of the normal outputs, enabling various logical operations in circuit design.

Detailed Application Field Plans

The SN74F74DR is commonly used in various digital systems and applications, including:

1. Sequential Logic Circuits: It is widely employed in the design of counters, shift registers, and other sequential logic circuits.
2. Data Storage: The flip-flops can be used to store and transfer binary data in memory systems or data processing units.
3. Synchronization: It is utilized for synchronizing signals in communication systems, ensuring accurate data transmission.
4. Control Systems: The chip finds applications in control systems where synchronized operations are required.

Detailed and Complete Alternative Models

1. SN74LS74A: Similar dual D-type flip-flop with improved specifications and performance.
2. CD4013B: CMOS-based dual D-type flip-flop with higher operating frequency and lower power consumption.
3. MC74HC74A: High-speed dual D-type flip-flop with enhanced noise immunity and wider supply voltage range.

These alternative models offer similar functionality to the SN74F74DR but may have different characteristics and specifications.

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