74AC74SJ

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Sequential Logic Device
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• High-Level Input Voltage: 2.0V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Current: -24mA
• Low-Level Output Current: 24mA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74AC74SJ has a total of 14 pins, which are assigned as follows:

1. CLR (Clear) - Clear input
2. D (Data) - Data input
3. CLK (Clock) - Clock input
4. Q (Output) - Output
5. Q̅ (Complementary Output) - Complementary output
6. GND (Ground) - Ground reference
7. Q̅ (Complementary Output) - Complementary output
8. Q (Output) - Output
9. VCC (Positive Power Supply) - Positive power supply
10. D (Data) - Data input
11. CLK (Clock) - Clock input
12. CLR (Clear) - Clear input
13. GND (Ground) - Ground reference
14. VCC (Positive Power Supply) - Positive power supply

Functional Features

• Dual D-Type Positive-Edge-Triggered Flip-Flop
• Provides two independent flip-flops in a single package
• Positive-edge-triggered clock inputs for synchronous operation
• Clear input for resetting the flip-flop outputs to a low state
• Data inputs for setting the flip-flop outputs based on the input data

Advantages and Disadvantages

Advantages: - Compact size due to integration of two flip-flops in one package - High-speed operation with positive-edge-triggered clock inputs - Versatile usage in various digital circuits

Disadvantages: - Limited voltage supply range (2.0V to 6.0V) - Not suitable for applications requiring negative-edge-triggered or asynchronous operation

Working Principles

The 74AC74SJ is a dual D-type flip-flop that operates on positive-edge-triggered clock inputs. It stores and transfers data based on the clock signal. The clear input allows resetting the flip-flop outputs to a low state, while the data inputs determine the output states when the clock triggers.

Detailed Application Field Plans

The 74AC74SJ finds application in various digital systems where sequential logic is required. Some common application fields include:

1. Digital Counters: Used as building blocks for designing synchronous counters.
2. Shift Registers: Utilized for serial-to-parallel or parallel-to-serial data conversion.
3. Memory Units: Employed in memory modules for storing and retrieving data.
4. Control Circuits: Integrated into control units for synchronization and timing purposes.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74AC74SJ are:

1. 74HC74: Dual D-Type Flip-Flop with High-Speed CMOS Technology
2. CD4013B: Dual D-Type Flip-Flop with CMOS Logic
3. SN74LS74A: Dual D-Type Positive-Edge-Triggered Flip-Flop with TTL Logic

These alternatives can be considered based on specific requirements and compatibility with the existing circuitry.

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