SN74ALS74ADR

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 pieces per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• High-Level Input Voltage: 2.0V min
• Low-Level Input Voltage: 0.8V max
• High-Level Output Voltage: 2.7V min
• Low-Level Output Voltage: 0.5V max
• Maximum Operating Frequency: 100MHz
• Propagation Delay Time: 10ns max
• Set-Up Time: 20ns min
• Hold Time: 10ns min

Detailed Pin Configuration

The SN74ALS74ADR has a total of 14 pins, which are assigned as follows:

1. CLR (Clear) - Active LOW clear input
2. D (Data) - Data input for the flip-flop
3. CLK (Clock) - Clock input for triggering the flip-flop
4. PR (Preset) - Active LOW preset input
5. Q (Output) - Complementary output of the flip-flop
6. Q̅ (Output) - Non-complementary output of the flip-flop
7. GND (Ground) - Ground reference for the IC
8. Q̅ (Output) - Non-complementary output of the flip-flop
9. Q (Output) - Complementary output of the flip-flop
10. VCC (Supply Voltage) - Positive supply voltage for the IC
11. D (Data) - Data input for the flip-flop
12. CLK (Clock) - Clock input for triggering the flip-flop
13. PR (Preset) - Active LOW preset input
14. CLR (Clear) - Active LOW clear input

Functional Features

• Dual D-Type Positive-Edge-Triggered Flip-Flop: The SN74ALS74ADR consists of two independent D-type flip-flops with positive-edge triggering. It can store and transfer binary data based on the clock signal.
• Asynchronous Clear and Preset Inputs: The IC provides active LOW clear (CLR) and preset (PR) inputs, allowing for immediate resetting or setting of the flip-flop outputs regardless of the clock signal.
• Complementary Outputs: The Q and Q̅ outputs provide complementary representations of the stored data, allowing for versatile usage in digital circuits.

Advantages and Disadvantages

Advantages: - High operating frequency allows for fast data storage and transfer. - Asynchronous clear and preset inputs provide flexibility in controlling the flip-flop outputs. - Small package size (SOIC) enables space-efficient circuit designs.

Disadvantages: - Limited supply voltage range restricts compatibility with certain systems. - Propagation delay time may introduce timing issues in high-speed applications.

Working Principles

The SN74ALS74ADR operates as a positive-edge-triggered flip-flop. When the clock input (CLK) transitions from LOW to HIGH, the data input (D) is sampled and stored in the flip-flop. The stored data is then available at the complementary outputs (Q and Q̅). The outputs can be asynchronously cleared or preset using the CLR and PR inputs, respectively.

Detailed Application Field Plans

The SN74ALS74ADR is commonly used in various digital systems and applications, including:

1. Sequential Logic Circuits: It is widely employed in sequential logic circuits such as counters, shift registers, and frequency dividers.
2. Data Storage and Transfer: The flip-flop functionality of the IC allows for reliable storage and transfer of binary data in microcontrollers, memory systems, and communication devices.
3. Clock Synchronization: It is utilized in clock synchronization circuits to ensure proper timing and synchronization between different components of a digital system.

Detailed and Complete Alternative Models

1. SN74ALS74AN: Similar to SN74ALS74ADR but available in a PDIP (Plastic Dual-In-Line Package) instead of SOIC.
2. MC74HC74A: Dual D-Type Flip-Flop with similar characteristics but operates at a lower supply voltage range (2V to 6V).
3. CD4013B: CMOS Dual D-Type Flip-Flop with higher operating frequency and wider supply voltage range (3V to 18V).

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