SN74ABT2245NSR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Transceiver
• Characteristics: High-speed, bidirectional voltage-level translator
• Package: 20-pin small-outline integrated circuit (SOIC)
• Essence: Transfers data between two bidirectional bus systems with different voltage levels
• Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Data Rate: 100Mbps

Detailed Pin Configuration

The SN74ABT2245NSR has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

• Bidirectional voltage-level translation between two bus systems
• Supports both 3.3V and 5V logic levels
• Enables communication between devices operating at different voltage levels
• High-speed data transfer with minimal propagation delay
• Output enable control for disabling the outputs when not in use

Advantages and Disadvantages

Advantages: - Allows interfacing between different voltage domains - Fast data transfer rate - Compact package size - Wide operating temperature range

Disadvantages: - Requires careful consideration of voltage compatibility - Limited to bidirectional bus applications - May introduce signal degradation if used beyond specified limits

Working Principles

The SN74ABT2245NSR acts as a bidirectional voltage-level translator, allowing data transfer between two bus systems with different voltage levels. It utilizes a direction control pin (DIR) to determine the direction of data flow. When DIR is set to logic high, data is transferred from Side A to Side B, and when DIR is set to logic low, data is transferred from Side B to Side A.

The device operates by using a combination of voltage level shifters and transceivers. The voltage level shifters ensure that the input signals from one bus system are translated to the appropriate voltage levels required by the other bus system. The transceivers handle the bidirectional data transfer, ensuring efficient and reliable communication between the two bus systems.

Detailed Application Field Plans

The SN74ABT2245NSR finds application in various fields where there is a need to interface between different voltage domains. Some common application areas include:

1. Embedded Systems: Used to connect microcontrollers or processors operating at different voltage levels.
2. Communication Systems: Facilitates data transfer between devices with varying logic levels, such as UART, SPI, or I2C interfaces.
3. Industrial Automation: Enables communication between different modules or subsystems operating at different voltage levels.
4. Automotive Electronics: Used in automotive systems to interface between components with different voltage requirements.

Detailed and Complete Alternative Models

1. SN74LVC4245A: Low-voltage CMOS octal bus transceiver with 3-state outputs.
2. SN74HCT245N: High-speed CMOS octal bus transceiver with 3-state outputs.
3. SN74LVCH245A: Low-voltage CMOS octal bus transceiver with 3-state outputs.

These alternative models offer similar functionality and can be used as substitutes for the SN74ABT2245NSR depending on specific application requirements.

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