SN74AHCT245DWR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter and Bus Transceiver
• Characteristics: High-Speed, Non-Inverting, 8-Bit Bidirectional Transceiver
• Package: SOIC-20 Wide
• Essence: This IC is designed to facilitate bidirectional level shifting between different voltage domains. It allows for seamless communication between devices operating at different logic levels.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Logic Voltage Levels: 3.3V and 5V
• Input/Output Compatibility: TTL, CMOS
• Number of Channels: 8
• Maximum Data Rate: 100Mbps
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74AHCT245DWR has a total of 20 pins arranged as follows:

1. DIR (Direction Control Input)
2. OE (Output Enable Input)
3. GND (Ground)
4. A1 (Data Input/Output)
5. B1 (Data Input/Output)
6. A2 (Data Input/Output)
7. B2 (Data Input/Output)
8. A3 (Data Input/Output)
9. B3 (Data Input/Output)
10. A4 (Data Input/Output)
11. B4 (Data Input/Output)
12. VCC (Supply Voltage)
13. B5 (Data Input/Output)
14. A5 (Data Input/Output)
15. B6 (Data Input/Output)
16. A6 (Data Input/Output)
17. B7 (Data Input/Output)
18. A7 (Data Input/Output)
19. B8 (Data Input/Output)
20. A8 (Data Input/Output)

Functional Features

• Bidirectional Data Transfer: Allows data to be transmitted in both directions, making it suitable for bus transceiver applications.
• Level Shifting: Facilitates communication between devices operating at different voltage levels, ensuring compatibility and seamless data transfer.
• High-Speed Operation: Capable of handling data rates up to 100Mbps, enabling efficient and fast data transmission.
• Non-Inverting Logic: Maintains the integrity of the input signal without any inversion, preserving the original data.

Advantages and Disadvantages

Advantages

• Enables bidirectional communication between devices with different voltage levels.
• Supports high-speed data transfer.
• Non-inverting logic ensures data integrity.
• Compact package size allows for space-efficient integration into electronic systems.

Disadvantages

• Limited to a specific supply voltage range (4.5V to 5.5V).
• Not suitable for applications requiring higher data rates beyond 100Mbps.

Working Principles

The SN74AHCT245DWR operates by receiving data from one side (e.g., A1-A8) and transmitting it to the other side (e.g., B1-B8) when the direction control input (DIR) is set accordingly. The output enable input (OE) controls the tri-state outputs, allowing the device to be effectively disabled when necessary. The IC utilizes level shifting circuitry to ensure compatibility between different voltage domains, enabling seamless data transfer.

Detailed Application Field Plans

The SN74AHCT245DWR finds application in various scenarios where bidirectional level shifting and bus transceiver functionality are required. Some potential application fields include:

1. Microcontroller Interfacing: Facilitating communication between microcontrollers operating at different voltage levels.
2. Sensor Networks: Enabling data exchange between sensors and microcontrollers with varying logic levels.
3. Industrial Automation: Supporting bidirectional data transfer between different control modules in industrial automation systems.
4. Communication Interfaces: Serving as a level shifter for UART, SPI, or I2C interfaces between devices with different voltage requirements.

Detailed and Complete Alternative Models

1. SN74LVC245A: Low-Voltage CMOS Octal Bus Transceiver
2. SN74LVCH245A: Low-Voltage CMOS Octal Bus Transceiver with 3-State Outputs
3. SN74HCT245: High-Speed CMOS Octal Bus Transceiver

These alternative models offer similar functionality to the SN74AHCT245DWR and can be considered based on specific application requirements.

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