MC74HCT245AFELG

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter/Transceiver
• Characteristics: High-Speed, CMOS Logic, Octal Bus Transceiver
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The MC74HCT245AFELG is a high-speed CMOS logic octal bus transceiver. It is designed to shift the voltage levels between two different systems, making it ideal for interfacing between devices operating at different voltage levels.
• Packaging/Quantity: The MC74HCT245AFELG is available in a 20-pin SOIC package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage Levels: VIL = 0.8V, VIH = 2V
• Output Voltage Levels: VOL = 0.1V, VOH = VCC - 0.1V
• Propagation Delay: 9 ns (max) at 5V supply voltage
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC74HCT245AFELG has a total of 20 pins. The pin configuration is as follows:

__ __ A1 |1 \__/ 20| VCC A2 |2 19| B1 A3 |3 18| B2 A4 |4 17| B3 A5 |5 16| B4 A6 |6 15| B5 A7 |7 14| B6 A8 |8 13| B7 GND |9 12| B8 OE |10 11| DIR ‾‾ ‾‾

Functional Features

• Bidirectional Data Transfer: The MC74HCT245AFELG allows for bidirectional data transfer between two systems, enabling seamless communication.
• Voltage Level Shifting: It can shift the voltage levels between two different systems, ensuring compatibility and reliable data transmission.
• High-Speed Operation: With a propagation delay of only 9 ns, it enables fast data transfer in high-speed applications.
• CMOS Logic: The use of CMOS technology provides low power consumption and improved noise immunity.

Advantages and Disadvantages

Advantages: - Enables interfacing between devices operating at different voltage levels. - Fast data transfer with low propagation delay. - Low power consumption due to CMOS technology.

Disadvantages: - Limited to a maximum supply voltage of 6V. - May require additional components for proper signal conditioning in certain applications.

Working Principles

The MC74HCT245AFELG operates by receiving data from one system and transmitting it to another. It uses level shifting techniques to ensure compatibility between the input and output voltage levels. The direction of data flow is controlled by the DIR pin, while the OE (Output Enable) pin enables or disables the data transmission.

Detailed Application Field Plans

The MC74HCT245AFELG finds applications in various fields where voltage level shifting and bidirectional data transfer are required. Some common application areas include:

1. Microcontroller Interfacing: It can be used to interface microcontrollers operating at different voltage levels, allowing them to communicate seamlessly.
2. Communication Systems: The transceiver functionality makes it suitable for use in communication systems, such as UART (Universal Asynchronous Receiver-Transmitter) interfaces.
3. Industrial Automation: It can be employed in industrial automation systems to interface between different control modules operating at different voltage levels.
4. Data Acquisition: The MC74HCT245AFELG can be used in data acquisition systems to shift voltage levels between sensors and data processing units.

Detailed and Complete Alternative Models

1. SN74HCT245N: This is a similar octal bus transceiver from Texas Instruments, offering comparable features and performance.
2. CD74HCT245E: Another alternative from Texas Instruments, providing bidirectional level shifting capabilities.
3. 74HCT245D: A variant from NXP Semiconductors, offering high-speed CMOS logic and bidirectional data transfer.

These alternative models can be considered based on specific requirements and availability.

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