Encyclopedia Entry: 74LVT640D,118

Product Overview

Category

The 74LVT640D,118 belongs to the category of integrated circuits (ICs) and specifically falls under the family of bus transceivers.

Use

This product is commonly used in digital systems for bidirectional data transfer between buses with different voltage levels. It acts as a buffer, ensuring smooth communication between these buses.

Characteristics

• Bidirectional data flow
• Voltage level translation
• High-speed operation
• Low power consumption
• Compact package size

Package

The 74LVT640D,118 is available in a small outline integrated circuit (SOIC) package. This package type provides ease of handling and compatibility with standard PCB designs.

Essence

The essence of the 74LVT640D,118 lies in its ability to facilitate efficient data transfer between buses operating at different voltage levels while maintaining signal integrity.

Packaging/Quantity

The product is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 2.7V to 3.6V
• Logic Family: LVT
• Number of Channels: 8
• Data Rate: Up to 400 Mbps
• Input/Output Compatibility: TTL/CMOS
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. OE (Output Enable)
2. A0 (Address Input)
3. A1 (Address Input)
4. A2 (Address Input)
5. GND (Ground)
6. B0 (Bidirectional Bus Line)
7. B1 (Bidirectional Bus Line)
8. VCC (Supply Voltage)
9. B2 (Bidirectional Bus Line)
10. B3 (Bidirectional Bus Line)
11. B4 (Bidirectional Bus Line)
12. B5 (Bidirectional Bus Line)
13. B6 (Bidirectional Bus Line)
14. B7 (Bidirectional Bus Line)
15. DIR (Direction Control)
16. GND (Ground)

Functional Features

• Bidirectional data transfer between buses with different voltage levels
• Automatic direction control based on the DIR pin
• Output enable/disable functionality for bus isolation
• TTL/CMOS compatible inputs and outputs
• High-speed operation for efficient data transmission

Advantages and Disadvantages

Advantages

• Enables seamless communication between buses with different voltage levels
• Supports high-speed data transfer
• Low power consumption
• Compact package size allows for space-efficient designs
• Easy integration into existing digital systems

Disadvantages

• Limited to a specific number of channels (8 in this case)
• Requires careful consideration of voltage compatibility with connected devices
• May not be suitable for applications requiring a large number of bidirectional bus lines

Working Principles

The 74LVT640D,118 operates by translating the voltage levels of incoming data signals from one bus to another. It uses internal circuitry to ensure bidirectional data flow while maintaining signal integrity. The DIR pin controls the direction of data transfer, and the OE pin enables or disables the output, allowing for bus isolation when necessary.

Detailed Application Field Plans

The 74LVT640D,118 finds application in various digital systems where bidirectional data transfer between buses with different voltage levels is required. Some common application fields include:

1. Microcontroller interfacing with external memory modules
2. Communication interfaces between different logic families
3. Data communication between FPGA/CPLD devices and peripheral components
4. Level shifting in mixed-voltage systems

Detailed and Complete Alternative Models

1. 74LVX245: Octal Bus Transceiver with 3-State Outputs
2. 74HCT640: Octal Bus Transceiver, Non-Inverting 3-State

These alternative models offer similar functionality to the 74LVT640D,118 and can be considered as alternatives based on specific requirements and compatibility with the system design.

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