Encyclopedia Entry: 74VHC245MTC

Product Overview

Category

The 74VHC245MTC belongs to the category of integrated circuits (ICs) and specifically falls under the family of voltage high-speed CMOS logic devices.

Use

This IC is commonly used as a bidirectional octal bus transceiver. It facilitates the transfer of data between two buses with different voltage levels, making it suitable for various digital communication applications.

Characteristics

• High-Speed Operation: The 74VHC245MTC is designed to operate at high speeds, enabling efficient data transfer.
• Bidirectional Functionality: This IC allows data transmission in both directions, making it versatile for different bus configurations.
• Voltage Compatibility: It supports voltage translation between two buses operating at different voltage levels.
• Low Power Consumption: The 74VHC245MTC is designed to consume minimal power, ensuring energy efficiency.

Package and Quantity

The 74VHC245MTC is available in a small outline surface-mount package (TSSOP-20). Each package contains one IC.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 200MHz
• Propagation Delay Time: 3.5ns (typical)
• Input/Output Capacitance: 4pF (typical)

Pin Configuration

The 74VHC245MTC has a total of 20 pins, which are assigned specific functions. The pin configuration is as follows:

+-------------------+ OE --|1 20|-- VCC A1~A8 -|2 19|-- B1~B8 GND --|3 18|-- OE B1~B8-|4 17|-- A1~A8 DIR --|5 16|-- GND NC --|6 15|-- DIR NC --|7 14|-- NC NC --|8 13|-- NC NC --|9 12|-- NC NC --|10 11|-- NC +-------------------+

Functional Features

• Bidirectional Data Transfer: The 74VHC245MTC enables data transmission in both directions, allowing for efficient communication between two buses.
• Voltage Level Translation: It facilitates the translation of voltage levels between two buses operating at different voltages, ensuring compatibility.
• Output Enable Control: The OE pin controls the output enable/disable function, providing flexibility in managing data flow.

Advantages and Disadvantages

Advantages

• High-speed operation allows for fast data transfer.
• Bidirectional functionality enhances versatility in bus configurations.
• Low power consumption ensures energy efficiency.
• Voltage level translation enables compatibility between different voltage domains.

Disadvantages

• Limited to a maximum operating frequency of 200MHz.
• May require additional circuitry for more complex applications.

Working Principles

The 74VHC245MTC operates based on CMOS technology. It utilizes transistors to control the flow of current, enabling bidirectional data transfer between two buses. The voltage level translation is achieved through the use of level shifters, which convert signals from one voltage domain to another.

Application Field Plans

The 74VHC245MTC finds application in various digital communication systems, including: - Microcontroller interfacing - Data acquisition systems - Industrial automation - Networking equipment - Consumer electronics

Alternative Models

For similar functionality, alternative models to the 74VHC245MTC include: - SN74LVC245A - MC74VHCT245A - CD74HCT245

These alternatives offer comparable features and can be used as substitutes depending on specific requirements.

In conclusion, the 74VHC245MTC is a high-speed CMOS logic IC that serves as a bidirectional octal bus transceiver. Its voltage level translation capability, low power consumption, and versatility make it suitable for various digital communication applications.

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