Encyclopedia Entry: 74AC521MTC

Product Overview

Category

The 74AC521MTC belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronic systems for data storage and retrieval purposes.

Characteristics

• The 74AC521MTC is a high-speed, low-power octal D-type flip-flop with 3-state outputs.
• It operates on a wide voltage range, typically between 2V and 6V.
• This IC offers fast propagation delay and high noise immunity, making it suitable for various applications.
• It features eight independent flip-flops with common clock and reset inputs.
• The 74AC521MTC has 3-state outputs, allowing multiple devices to be connected together without bus contention issues.

Package and Quantity

The 74AC521MTC is available in a small outline surface-mount package (TSSOP) with 20 pins. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 2V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Voltage: VCC - 0.5V
• Low-Level Output Voltage: 0.5V
• Maximum Clock Frequency: 200 MHz
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The 74AC521MTC has a total of 20 pins, which are assigned specific functions as follows:

1. D0: Data input for flip-flop 0
2. D1: Data input for flip-flop 1
3. D2: Data input for flip-flop 2
4. D3: Data input for flip-flop 3
5. D4: Data input for flip-flop 4
6. D5: Data input for flip-flop 5
7. D6: Data input for flip-flop 6
8. D7: Data input for flip-flop 7
9. GND: Ground (0V)
10. Q0: Output of flip-flop 0
11. Q1: Output of flip-flop 1
12. Q2: Output of flip-flop 2
13. Q3: Output of flip-flop 3
14. Q4: Output of flip-flop 4
15. Q5: Output of flip-flop 5
16. Q6: Output of flip-flop 6
17. Q7: Output of flip-flop 7
18. CP: Clock input
19. MR: Master reset input
20. VCC: Positive power supply voltage

Functional Features

The 74AC521MTC offers the following functional features:

• Independent storage and retrieval of data in eight flip-flops.
• Common clock input for synchronous operation.
• Master reset input for clearing all flip-flops simultaneously.
• 3-state outputs allow multiple devices to be connected together without bus contention.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data processing.
• Low power consumption makes it suitable for portable electronic devices.
• Wide voltage range allows compatibility with various systems.
• 3-state outputs facilitate bus sharing and reduce conflicts.

Disadvantages

• Limited number of flip-flops (eight) may not suffice for complex applications.
• Surface-mount package may require specialized equipment for soldering.

Working Principles

The 74AC521MTC operates based on the principles of digital logic circuits. It utilizes flip-flops to store and retrieve binary data. The clock input synchronizes the operation of all flip-flops, ensuring proper data handling. The master reset input allows for simultaneous clearing of all flip-flops when required.

Application Field Plans

The 74AC521MTC finds applications in various digital electronic systems, including but not limited to:

1. Data storage and retrieval systems
2. Address decoding circuits
3. Memory interfacing units
4. Bus control and arbitration circuits
5. State machine implementations

Alternative Models

For similar functionality, the following alternative models can be considered:

1. SN74AC521: Manufactured by Texas Instruments
2. CD74AC521: Manufactured by Texas Instruments
3. MC74AC521: Manufactured by ON Semiconductor

These alternative models offer comparable features and can be used as substitutes for the 74AC521MTC in different applications.

In conclusion, the 74AC521MTC is a versatile integrated circuit commonly used for data storage and retrieval purposes in digital electronic systems. Its high-speed operation, low power consumption, and 3-state outputs make it suitable for various applications. With its compact package and wide voltage range,