Encyclopedia Entry: 74AC373SJ

Product Overview

Category

The 74AC373SJ belongs to the category of integrated circuits (ICs), specifically a type of flip-flop IC.

Use

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

Characteristics

• High-speed operation: The 74AC373SJ operates at high clock frequencies, making it suitable for applications requiring fast data transfer.
• Three-state outputs: This feature allows multiple devices to share a common bus without interfering with each other's output signals.
• Low power consumption: The IC is designed to minimize power consumption, making it energy-efficient.

Package

The 74AC373SJ is available in a standard 20-pin small outline integrated circuit (SOIC) package. This package offers compactness and ease of integration into electronic systems.

Essence

The essence of the 74AC373SJ lies in its ability to store and transfer data efficiently within digital circuits. It provides a reliable solution for managing data flow in various applications.

Packaging/Quantity

The IC is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier, but a common packaging option is a reel containing 250 units.

Specifications

• Supply voltage: 2V to 6V
• Input voltage range: 0V to VCC
• Output voltage range: 0V to VCC
• Operating temperature range: -40°C to +85°C
• Maximum propagation delay: 7 ns
• Maximum quiescent current: 10 μA

Detailed Pin Configuration

The 74AC373SJ has a total of 20 pins, each serving a specific function. Here is the detailed pin configuration:

1. D0: Data input 0
2. D1: Data input 1
3. D2: Data input 2
4. D3: Data input 3
5. D4: Data input 4
6. D5: Data input 5
7. D6: Data input 6
8. D7: Data input 7
9. GND: Ground
10. OE: Output enable
11. Q0: Output 0
12. Q1: Output 1
13. Q2: Output 2
14. Q3: Output 3
15. Q4: Output 4
16. Q5: Output 5
17. Q6: Output 6
18. Q7: Output 7
19. VCC: Supply voltage
20. LE: Latch enable

Functional Features

The 74AC373SJ offers the following functional features:

• Transparent latch: The IC can store data while allowing it to pass through when the latch is enabled.
• Three-state outputs: The outputs can be put into a high-impedance state, enabling multiple devices to share a common bus without signal interference.
• Edge-triggered operation: The latch captures data on the rising edge of the clock signal, ensuring accurate data storage.

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data transfer.
• Three-state outputs facilitate bus sharing in complex systems.
• Low power consumption contributes to energy efficiency.
• Compact package enables easy integration into electronic circuits.

Disadvantages

• Limited number of output pins (8) may restrict certain applications requiring more outputs.
• Requires careful consideration of timing and clock signals for proper operation.

Working Principles

The 74AC373SJ operates based on the principles of flip-flops and latches. When the latch enable (LE) signal is active, the IC stores the data present at the input pins. The stored data is then available at the output pins when the output enable (OE) signal is active. The latch remains transparent, allowing new data to pass through until the LE signal is deactivated.

Detailed Application Field Plans

The 74AC373SJ finds applications in various digital systems, including but not limited to:

1. Microprocessors and microcontrollers: Used for data storage and transfer between the processor and peripherals.
2. Memory systems: Facilitates data buffering and address decoding in memory modules.
3. Communication systems: Enables efficient data transmission and reception in networking equipment.
4. Industrial automation: Utilized in control systems for storing and transferring sensor data.
5. Automotive electronics: Supports data management in automotive control units.

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the 74AC373SJ. Some notable alternatives include:

• 74HC373: A CMOS version of the IC with comparable characteristics.
• CD74ACT373: Another popular flip-flop IC with similar features.
• SN74LS373: A TTL logic family IC suitable for many