Encyclopedia Entry: 74LVT640DB,112

Product Overview

Category

The 74LVT640DB,112 belongs to the category of integrated circuits (ICs) and specifically falls under the family of LVT (Low Voltage Transceiver) series.

Use

This IC is primarily used as a bidirectional transceiver, facilitating the exchange of data between two separate buses. It acts as a bridge, enabling communication between different systems or devices.

Characteristics

• Low voltage operation: The 74LVT640DB,112 operates at low voltage levels, typically around 3.3V.
• High-speed performance: This transceiver offers fast data transmission rates, making it suitable for applications requiring quick data exchange.
• Bidirectional functionality: It supports data transfer in both directions, allowing for efficient communication between buses.
• Tri-state outputs: The IC features tri-state outputs, which enable multiple devices to share a common bus without interfering with each other.

Package and Quantity

The 74LVT640DB,112 is available in a standard surface mount package, commonly known as SOIC-20. Each package contains one unit of the IC.

Specifications

• Supply Voltage: 2.7V to 3.6V
• Operating Temperature Range: -40°C to +85°C
• Input/Output Compatibility: TTL, CMOS
• Maximum Data Rate: 400Mbps

Pin Configuration

The IC has a total of 20 pins, arranged as follows:

```

Pin Number | Pin Name | Description

   1         |        OE        | Output Enable
   2         |       A1B1       | Bus A1/B1
   3         |       A2B2       | Bus A2/B2
   4         |       A3B3       | Bus A3/B3
   5         |       A4B4       | Bus A4/B4
   6         |       GND        | Ground
   7         |       B4A4       | Bus B4/A4
   8         |       B3A3       | Bus B3/A3
   9         |       B2A2       | Bus B2/A2
  10         |       B1A1       | Bus B1/A1
  11         |       VCC        | Power Supply
  12         |       DIR        | Direction Control
  13         |       GND        | Ground
  14         |       B1A1       | Bus B1/A1
  15         |       B2A2       | Bus B2/A2
  16         |       B3A3       | Bus B3/A3
  17         |       B4A4       | Bus B4/A4
  18         |       GND        | Ground
  19         |       A4B4       | Bus A4/B4
  20         |       A3B3       | Bus A3/B3

```

Functional Features

• Bidirectional Data Transfer: The IC allows data to be transmitted in both directions, facilitating communication between two buses.
• Output Enable (OE) Control: The OE pin enables or disables the outputs, providing control over the data flow.
• Direction Control (DIR): The DIR pin determines the direction of data transmission, allowing for flexible operation.

Advantages and Disadvantages

Advantages

• Low voltage operation makes it compatible with modern electronic systems.
• High-speed performance ensures efficient data transfer.
• Tri-state outputs enable multiple devices to share a common bus without interference.

Disadvantages

• Limited voltage range (2.7V to 3.6V) may restrict compatibility with certain systems.
• The SOIC-20 package may not be suitable for all applications, requiring additional considerations for PCB layout and space constraints.

Working Principles

The 74LVT640DB,112 operates based on the principles of digital logic. It utilizes internal circuitry to control the direction of data flow and enable/disable the outputs. By synchronizing the signals from two separate buses, it allows bidirectional communication between them.

Application Field Plans

The 74LVT640DB,112 finds application in various fields, including: 1. Data communication systems 2. Networking equipment 3. Industrial automation 4. Automotive electronics 5. Consumer electronics

Alternative Models

Other alternative models that offer similar functionality to the 74LVT640DB,112 include: - 74LVTH640DB,112 - 74LVC640DB,112 - 74LVX640DB,112

These alternatives can be considered based on specific requirements and compatibility with the target system.