Encyclopedia Entry: 74ACT2708

Product Overview

Category

The 74ACT2708 belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital logic devices.

Use

This IC is primarily used for data storage and retrieval purposes in various electronic systems. It serves as a high-speed, 8-bit addressable latch with three-state outputs.

Characteristics

• High-speed operation: The 74ACT2708 offers fast data transfer rates, making it suitable for applications requiring quick response times.
• Addressable latch: It can store and retrieve data based on an 8-bit address input.
• Three-state outputs: The IC provides three-state outputs, allowing multiple devices to share a common bus without interference.
• Low power consumption: It operates efficiently with low power requirements.
• Wide operating voltage range: The device can function within a broad voltage range, enhancing its versatility.

Package and Quantity

The 74ACT2708 is available in various package options, including DIP (Dual Inline Package) and SOIC (Small Outline Integrated Circuit). The quantity per package typically ranges from one to several hundred units.

Essence

The essence of the 74ACT2708 lies in its ability to store and retrieve data quickly, providing efficient data management in electronic systems.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• 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: 6 ns (typical)

Pin Configuration

The 74ACT2708 features a 20-pin configuration, with each pin serving a specific purpose. The detailed pinout 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. A0 (Address Input 0)
11. A1 (Address Input 1)
12. A2 (Address Input 2)
13. OE (Output Enable)
14. LE (Latch Enable)
15. Q0 (Output 0)
16. Q1 (Output 1)
17. Q2 (Output 2)
18. Q3 (Output 3)
19. Q4 (Output 4)
20. VCC (Supply Voltage)

Functional Features

The key functional features of the 74ACT2708 include:

• Data storage: The IC can store data based on the address inputs provided.
• Data retrieval: It allows for the retrieval of stored data based on the specified address.
• Three-state outputs: The device offers three-state outputs, enabling efficient bus sharing among multiple devices.
• Latch enable control: The latch enable input (LE) controls the storage and retrieval operations.
• Output enable control: The output enable input (OE) enables or disables the outputs.

Advantages and Disadvantages

Advantages

• High-speed operation facilitates quick data transfer.
• Versatile voltage range allows for compatibility with various systems.
• Low power consumption enhances energy efficiency.
• Three-state outputs enable efficient bus sharing.

Disadvantages

• Limited storage capacity: The 74ACT2708 is an 8-bit addressable latch, which may not be sufficient for applications requiring larger data storage.

Working Principles

The 74ACT2708 operates based on the principles of digital logic. It utilizes address inputs to select a specific latch and store or retrieve data accordingly. The latch enable (LE) input controls the storage and retrieval operations, while the output enable (OE) input enables or disables the outputs.

Application Field Plans

The 74ACT2708 finds applications in various electronic systems, including but not limited to: - Microprocessors and microcontrollers - Memory modules - Communication devices - Data acquisition systems - Industrial automation equipment

Alternative Models

Several alternative models can be considered as substitutes for the 74ACT2708, depending on specific requirements. Some notable alternatives include: - 74HC2708: A similar latch with lower power consumption but slower operation. - 74LS2708: A latch with TTL (Transistor-Transistor Logic) compatibility but higher power consumption.

These alternative models offer different trade-offs in terms of speed, power consumption, and compatibility, allowing users to choose the most suitable option for their application.

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