SN74ACT74N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Flip-Flop
• Characteristics: Dual D-Type Positive-Edge-Triggered Flip-Flop
• Package: PDIP (Plastic Dual-In-Line Package)
• Essence: A digital logic component used for storing and transferring binary data in electronic circuits.
• Packaging/Quantity: Available in tubes or reels, typically sold in quantities of 25 or 50 units.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V 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 SN74ACT74N has a total of 14 pins, which are assigned specific functions as follows:

1. CLR (Clear) - Asynchronous clear input
2. D1 (Data 1) - Data input for the first flip-flop
3. CLK (Clock) - Clock input
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
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) - Asynchronous preset input
11. PRD (Preset Direct) - Direct preset input
12. CLR' (Complementary Clear) - Complementary clear input
13. VCC (Positive Power Supply) - Positive power supply voltage
14. PRD' (Complementary Preset Direct) - Complementary direct preset input

Functional Features

The SN74ACT74N is a dual D-type positive-edge-triggered flip-flop that can store and transfer binary data. It operates on a clock signal, allowing the input data to be captured and stored at the rising edge of the clock. The flip-flop has asynchronous clear and preset inputs, which can override the clocked operation and force the outputs to a known state.

Advantages and Disadvantages

Advantages: - Dual flip-flop in a single package, saving board space. - High-speed operation with low power consumption. - Wide operating voltage range allows for compatibility with various systems. - Asynchronous clear and preset inputs provide flexibility in controlling the output states.

Disadvantages: - Limited number of flip-flops in a single package. - Requires external clock signal for proper operation. - Sensitive to noise and timing issues, requiring careful design considerations.

Working Principles

The SN74ACT74N operates based on the principles of sequential logic. When the clock signal transitions from low to high (rising edge), the input data is sampled and stored in the flip-flop. The stored data is then available at the outputs until the next clock transition occurs. The clear and preset inputs allow for overriding the clocked operation and forcing the outputs to specific states.

Detailed Application Field Plans

The SN74ACT74N is commonly used in various digital systems and applications, including but not limited to: - Data storage and transfer in microcontrollers and microprocessors. - State machine designs. - Counters and frequency dividers. - Communication systems. - Control systems.

Detailed and Complete Alternative Models

• SN74ACT74: Similar to SN74ACT74N but in a different package (SOIC).
• CD74ACT74: Equivalent flip-flop from a different manufacturer (Texas Instruments).

These alternative models provide similar functionality and can be used as substitutes for the SN74ACT74N depending on specific requirements and availability.

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