Encyclopedia Entry: 74ACT521SC

Product Overview

Category

The 74ACT521SC belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronic systems for various applications, including data processing, signal transmission, and control functions.

Characteristics

• The 74ACT521SC is a high-speed octal D-type flip-flop with a parallel-to-serial data conversion feature.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers excellent noise immunity and low power consumption.
• It is designed to be compatible with TTL (Transistor-Transistor Logic) inputs and outputs.

Package

The 74ACT521SC is available in a standard 20-pin small-outline package (SOIC).

Essence

The essence of the 74ACT521SC lies in its ability to store and manipulate digital information efficiently. It provides a reliable and versatile solution for various digital circuit designs.

Packaging/Quantity

The 74ACT521SC is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Voltage: VCC - 0.5V
• Low-Level Output Voltage: 0.4V
• Maximum Operating Frequency: 125 MHz
• Propagation Delay Time: 3.5 ns (max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74ACT521SC has a total of 20 pins, each serving a specific function. Here is the detailed pin configuration:

1. GND (Ground)
2. D0 (Data Input 0)
3. D1 (Data Input 1)
4. D2 (Data Input 2)
5. D3 (Data Input 3)
6. D4 (Data Input 4)
7. D5 (Data Input 5)
8. D6 (Data Input 6)
9. D7 (Data Input 7)
10. CP (Clock Pulse Input)
11. MR (Master Reset Input)
12. Q7 (Serial Output)
13. Q6 (Parallel Output 6)
14. Q5 (Parallel Output 5)
15. Q4 (Parallel Output 4)
16. Q3 (Parallel Output 3)
17. Q2 (Parallel Output 2)
18. Q1 (Parallel Output 1)
19. Q0 (Parallel Output 0)
20. VCC (Supply Voltage)

Functional Features

The 74ACT521SC offers the following functional features:

• Parallel-to-serial data conversion: It can convert parallel input data into a serial output stream.
• High-speed operation: With a maximum operating frequency of 125 MHz, it enables rapid data processing.
• Clock pulse input: The CP pin allows synchronization of data transfer with an external clock signal.
• Master reset input: The MR pin resets the flip-flop to its initial state when activated.

Advantages and Disadvantages

Advantages

• Wide voltage range compatibility enhances versatility in various digital circuit designs.
• Excellent noise immunity ensures reliable operation even in noisy environments.
• Low power consumption contributes to energy-efficient system designs.
• High-speed operation enables efficient data processing.

Disadvantages

• Limited availability of alternative models may restrict design flexibility.
• The small-outline package may require careful handling during assembly to avoid damage.

Working Principles

The 74ACT521SC operates based on the principles of digital logic. It utilizes flip-flops to store and manipulate binary data. The parallel-to-serial conversion is achieved by sequentially shifting the stored data out through the serial output pin.

Detailed Application Field Plans

The 74ACT521SC finds applications in various fields, including:

1. Data communication systems
2. Microprocessor-based systems
3. Industrial control systems
4. Instrumentation and measurement equipment
5. Automotive electronics
6. Consumer electronics

Detailed and Complete Alternative Models

While the 74ACT521SC is a widely used IC, there are alternative models available that offer similar functionality. Some notable alternatives include:

1. 74HC521: This IC operates at a lower voltage range (2V to 5.5V) but provides compatibility with CMOS logic levels.
2. 74LS521: This IC operates at a wider temperature range (-55°C to +125°C) and offers compatibility with low-power Schottky TTL inputs and outputs.

These alternative models can be considered based on specific design requirements and constraints.

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