Encyclopedia Entry: 74HC373D

Product Overview

Category

The 74HC373D belongs to the category of integrated circuits (ICs) and specifically falls under the group of flip-flops.

Use

This IC is commonly used for storing and transferring data in digital systems. It serves as an octal transparent latch with three-state outputs.

Characteristics

• Octal transparent latch
• Three-state outputs
• High-speed operation
• Low power consumption
• Wide operating voltage range

Package and Quantity

The 74HC373D is available in a standard dual in-line package (DIP) with 20 pins. It is typically sold in reels or tubes, containing multiple units per package.

Essence

The essence of the 74HC373D lies in its ability to store and transfer data efficiently within digital systems. It provides a reliable solution for latching and outputting data in various applications.

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 +125°C
• Maximum Clock Frequency: 80 MHz
• Maximum Propagation Delay: 15 ns

Pin Configuration

The 74HC373D has a total of 20 pins, which are assigned specific functions. The detailed pin configuration is as follows:

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. G (Gated Latch Enable)
11. LE (Latch Enable)
12. O0 (Output 0)
13. O1 (Output 1)
14. O2 (Output 2)
15. O3 (Output 3)
16. O4 (Output 4)
17. O5 (Output 5)
18. O6 (Output 6)
19. O7 (Output 7)
20. VCC (Supply Voltage)

Functional Features

The 74HC373D offers the following functional features:

• Octal transparent latch with three-state outputs
• Data inputs (D0-D7) for storing information
• Latch enable (LE) input for controlling data transfer
• Gated latch enable (G) input for additional control
• Three-state outputs (O0-O7) for flexible data output

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data handling
• Low power consumption ensures energy efficiency
• Wide operating voltage range provides versatility in different systems
• Three-state outputs allow for easy integration into bus systems

Disadvantages

• Limited number of data inputs (8 bits)
• Not suitable for applications requiring larger data storage capacity

Working Principles

The 74HC373D operates based on the principles of flip-flops. When the latch enable (LE) input is high, the data inputs (D0-D7) are latched and stored internally. The gated latch enable (G) input further controls the transfer of data to the outputs (O0-O7). When the G input is low, the outputs are in a high-impedance state, allowing other devices to drive the bus lines.

Detailed Application Field Plans

The 74HC373D finds extensive use in various digital systems and applications, including but not limited to:

1. Microprocessor-based systems
2. Data storage and transfer systems
3. Address decoding circuits
4. Bus interface units
5. Control and timing circuits

Alternative Models

For those seeking alternatives to the 74HC373D, the following models provide similar functionality:

1. SN74LS373: Low-power Schottky version
2. CD74HC373: CMOS version with improved noise immunity
3. MC74HC373: Motorola's equivalent model

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

In conclusion, the 74HC373D is a versatile integrated circuit that serves as an octal transparent latch with three-state outputs. Its high-speed operation, low power consumption, and wide operating voltage range make it suitable for various digital applications. However, its limited data input capacity may restrict its use in certain scenarios. Understanding its pin configuration, functional features, advantages, disadvantages, working principles, application field plans, and alternative models allows for informed decision-making when incorporating the 74HC373D into digital designs.