Encyclopedia Entry: 74VHC373N

Product Overview

Category

The 74VHC373N belongs to the category of integrated circuits (ICs) and specifically falls under the family of VHC series logic devices.

Use

This IC is commonly used in digital electronics for data storage and transfer applications. It serves as an octal transparent latch with 3-state outputs.

Characteristics

• High-speed operation: The 74VHC373N offers fast switching times, making it suitable for high-performance systems.
• Low power consumption: This IC is designed to operate at low power levels, reducing energy consumption.
• Wide operating voltage range: It can function within a voltage range of 2.0V to 5.5V, providing flexibility in various electronic systems.
• 3-state outputs: The 74VHC373N features 3-state outputs, allowing multiple devices to share a common bus.

Package and Quantity

The 74VHC373N is typically available in a 20-pin DIP (Dual Inline Package) format. It is supplied in tubes or reels, with a standard quantity of 25 units per tube/reel.

Specifications

• Logic Family: VHC
• Number of Pins: 20
• Supply Voltage Range: 2.0V to 5.5V
• Input/Output Compatibility: TTL, CMOS
• Output Current: ±8mA
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 4.5ns (max)
• Output Transition Time: 6.5ns (max)

Detailed Pin Configuration

The 74VHC373N has a total of 20 pins, which are assigned specific functions as follows:

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

Functional Features

The 74VHC373N offers the following functional features:

• Transparent latch operation: The IC allows data to pass through when the latch enable (LE) input is high.
• 3-state outputs: The outputs can be put into a high-impedance state by setting the output enable (OE) input to low, enabling multiple devices to share a common bus.
• Edge-triggered clocking: The latch captures the data on the rising edge of the clock signal (CLK).

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer.
• Low power consumption contributes to energy efficiency.
• Wide operating voltage range allows compatibility with various systems.
• 3-state outputs facilitate bus sharing.

Disadvantages

• Limited number of inputs and outputs restricts scalability for complex applications.
• Not suitable for applications requiring high noise immunity.

Working Principles

The 74VHC373N operates based on transparent latch functionality. When the latch enable (LE) input is high, the data inputs (D0-D7) are transferred to the outputs (Q0-Q7). The outputs can be enabled or disabled using the output enable (OE) input. The latch captures the data on the rising edge of the clock signal (CLK).

Detailed Application Field Plans

The 74VHC373N finds applications in various digital systems, including but not limited to:

1. Microprocessor-based systems
2. Data storage and transfer systems
3. Communication equipment
4. Industrial control systems
5. Automotive electronics

Alternative Models

Several alternative models with similar functionality to the 74VHC373N include:

1. 74HCT373: This IC offers compatibility with both TTL and CMOS logic levels.
2. SN74LS373: A popular IC from Texas Instruments, providing octal transparent latching with 3-state outputs.
3. CD74ACT373: An advanced CMOS IC with improved noise immunity and higher speed capabilities.

These alternative