Encyclopedia Entry: 74ACQ543SPC

Product Overview

Category

The 74ACQ543SPC belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital logic devices.

Use

This IC is commonly used in electronic circuits for data processing and manipulation. It serves as a high-speed octal transparent latch with three-state outputs.

Characteristics

• High-speed operation: The 74ACQ543SPC is designed to operate at high clock frequencies, making it suitable for applications requiring fast data transfer.
• Octal transparent latch: It can store and hold eight bits of data, which can be latched or transparently passed through based on the control inputs.
• Three-state outputs: The IC provides three-state outputs, allowing multiple devices to share a common bus without interfering with each other's signals.

Package and Quantity

The 74ACQ543SPC is available in a standard 20-pin small outline package (SOIC). Each package contains one IC.

Essence

The essence of the 74ACQ543SPC lies in its ability to store and manipulate digital data efficiently, enabling seamless communication between various components in electronic systems.

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: 100 MHz
• Propagation Delay: 5 ns (typical)

Pin Configuration

The 74ACQ543SPC has a total of 20 pins, each serving a specific function. Here is the detailed pin configuration:

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. LE (Latch Enable)
11. OE (Output Enable)
12. CP (Clock Pulse)
13. Q0 (Output 0)
14. Q1 (Output 1)
15. Q2 (Output 2)
16. Q3 (Output 3)
17. Q4 (Output 4)
18. Q5 (Output 5)
19. Q6 (Output 6)
20. Q7 (Output 7)

Functional Features

The key functional features of the 74ACQ543SPC include:

• Transparent latch operation: When the latch enable (LE) input is high, the data inputs are transparently passed through to the outputs.
• Latched operation: When the LE input is low, the data inputs are latched and held at the outputs until the next clock pulse.
• Three-state outputs: The outputs can be disabled by setting the output enable (OE) input to high, allowing multiple devices to share a common bus without signal interference.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer in time-critical applications.
• Octal latch design provides the ability to store and manipulate eight bits of data simultaneously.
• Three-state outputs allow for bus sharing and reduce signal conflicts in complex systems.

Disadvantages

• Limited voltage range (2V to 6V) may restrict compatibility with certain power supply configurations.
• Propagation delay of 5 ns (typical) may introduce timing constraints in highly synchronized circuits.

Working Principles

The 74ACQ543SPC operates based on the principles of digital logic. When the latch enable (LE) input is high, the data inputs are directly passed through to the outputs. Conversely, when the LE input is low, the data inputs are latched and held at the outputs until the next clock pulse arrives. The output enable (OE) input allows the outputs to be disabled, preventing them from driving the bus.

Application Field Plans

The 74ACQ543SPC finds applications in various fields where efficient data storage and manipulation are required. Some specific application areas include:

1. Data communication systems
2. Microprocessor-based systems
3. Memory interfacing
4. Industrial automation
5. Automotive electronics

Alternative Models

There are several alternative models available that offer similar functionality to the 74ACQ543SPC. These include:

1. 74HC543: A CMOS version of the octal transparent latch with three-state outputs.
2. 74F543: A faster version of the octal transparent latch with three-state outputs.
3. 74LS543: A low-power Schottky version of the octal transparent latch with three-state outputs.

These alternative