Encyclopedia Entry: 74AC374B

Product Overview

Category

The 74AC374B belongs to the category of integrated circuits (ICs) and specifically falls under the family of flip-flops.

Use

This IC is commonly used in digital electronics for storing and transferring data. It serves as a D-type transparent latch with 3-state outputs.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• 3-state outputs for bus-oriented applications
• Schmitt-trigger action on all inputs
• Balanced propagation delays

Package

The 74AC374B is typically available in a 20-pin dual in-line package (DIP), which allows for easy integration into electronic circuit boards.

Essence

The essence of the 74AC374B lies in its ability to store and transfer data efficiently, making it an essential component in various digital systems.

Packaging/Quantity

This IC is commonly sold in reels or tubes, with each reel containing approximately 2500 units.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 140 MHz
• Maximum Propagation Delay: 7 ns

Detailed Pin Configuration

The 74AC374B has a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. Data Input (D0)
2. Data Input (D1)
3. Data Input (D2)
4. Data Input (D3)
5. Data Input (D4)
6. Data Input (D5)
7. Data Input (D6)
8. Data Input (D7)
9. Clock Input (CLK)
10. Output Enable Input (OE)
11. Clear Input (CLR)
12. Data Output (Q0)
13. Data Output (Q1)
14. Data Output (Q2)
15. Data Output (Q3)
16. Data Output (Q4)
17. Data Output (Q5)
18. Data Output (Q6)
19. Data Output (Q7)
20. Ground (GND)

Functional Features

• Transparent latch operation: The 74AC374B allows data to be latched and stored when the clock input is high.
• 3-state outputs: The IC provides three-state outputs, enabling bus-oriented applications where multiple devices can share a common data bus.
• Schmitt-trigger action: All inputs of the IC employ Schmitt-trigger action, ensuring reliable and noise-immune operation.
• Balanced propagation delays: The IC exhibits balanced propagation delays, making it suitable for high-speed applications.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer.
• Low power consumption contributes to energy-efficient designs.
• Wide operating voltage range allows compatibility with various systems.
• 3-state outputs facilitate bus-oriented applications.
• Schmitt-trigger action ensures reliable operation in noisy environments.

Disadvantages

• Limited number of data inputs (D0-D7) may restrict certain applications requiring more inputs.
• Non-inverting outputs may not be suitable for all circuit configurations.

Working Principles

The 74AC374B operates based on the principles of flip-flops. When the clock input (CLK) is high, the data inputs (D0-D7) are latched and stored in the internal memory. The stored data can then be accessed through the corresponding data outputs (Q0-Q7). The output enable input (OE) controls the activation of the outputs, while the clear input (CLR) resets the latch to its initial state.

Detailed Application Field Plans

The 74AC374B finds applications in various digital systems, including but not limited to: - Microprocessors and microcontrollers - Data storage devices - Communication systems - Industrial automation - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the 74AC374B. Some notable alternatives include: - 74HC374: A CMOS version with similar characteristics but a lower operating voltage range. - 74LS374: A TTL version with compatible pin configuration but slower operation speed. - CD74ACT374: An alternative from a different manufacturer with comparable specifications.

These alternative models can be considered based on specific design requirements and compatibility with existing systems.

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