SN74ABT657ADBR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Transceiver
• Characteristics: High-speed, bidirectional data transfer, voltage level translation
• Package: SSOP (Shrink Small Outline Package)
• Essence: Transfers data between two buses with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Logic Family: ABT
• Number of Channels: 8
• Data Rate: Up to 100 Mbps
• Input/Output Voltage Levels: 3.3V/5V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SN74ABT657ADBR has a total of 24 pins. The pin configuration is as follows:

1. OE (Output Enable) A
2. I/O0A (Bidirectional Data I/O) A
3. I/O1A (Bidirectional Data I/O) A
4. I/O2A (Bidirectional Data I/O) A
5. I/O3A (Bidirectional Data I/O) A
6. GND (Ground)
7. VCC (Power Supply)
8. I/O4A (Bidirectional Data I/O) A
9. I/O5A (Bidirectional Data I/O) A
10. I/O6A (Bidirectional Data I/O) A
11. I/O7A (Bidirectional Data I/O) A
12. OE (Output Enable) B
13. I/O0B (Bidirectional Data I/O) B
14. I/O1B (Bidirectional Data I/O) B
15. I/O2B (Bidirectional Data I/O) B
16. I/O3B (Bidirectional Data I/O) B
17. GND (Ground)
18. VCC (Power Supply)
19. I/O4B (Bidirectional Data I/O) B
20. I/O5B (Bidirectional Data I/O) B
21. I/O6B (Bidirectional Data I/O) B
22. I/O7B (Bidirectional Data I/O) B
23. A1 (Address Input)
24. A0 (Address Input)

Functional Features

• Bidirectional data transfer between two buses with different voltage levels
• Voltage level translation from 3.3V to 5V and vice versa
• High-speed operation up to 100 Mbps
• Output enable control for each bus independently
• ESD protection on all inputs and outputs

Advantages and Disadvantages

Advantages: - Enables seamless communication between buses with different voltage levels - High-speed data transfer capability - Provides ESD protection for enhanced reliability

Disadvantages: - Limited to 8 channels, may not be suitable for applications requiring more channels - Requires careful consideration of power supply voltage compatibility

Working Principles

The SN74ABT657ADBR is a bidirectional bus transceiver that allows data transfer between two buses operating at different voltage levels. It utilizes voltage level translation circuitry to ensure compatibility between the input/output voltage levels of the two buses.

The device features separate output enable controls for each bus, allowing independent control over the direction of data flow. When the output enable pin is active, data can be transferred bidirectionally between the buses. When the output enable pin is inactive, the device enters a high-impedance state, isolating the buses from each other.

ESD protection is incorporated on all inputs and outputs to safeguard against electrostatic discharge events, enhancing the reliability of the device.

Detailed Application Field Plans

The SN74ABT657ADBR is commonly used in various applications that require bidirectional data transfer between buses operating at different voltage levels. Some of the application fields where this IC finds utility include:

1. Microcontroller interfacing: Enables communication between microcontrollers operating at different voltage levels.
2. Communication systems: Facilitates data exchange between different communication interfaces, such as UART, SPI, and I2C, with varying voltage requirements.
3. Industrial automation: Allows integration of devices with different voltage level requirements into a unified control system.
4. Automotive electronics: Supports data transfer between different subsystems within a vehicle, which may operate at distinct voltage levels.

Detailed and Complete Alternative Models

1. SN74LVC245A: 8-bit bus transceiver with voltage level translation capability, operates at lower power supply voltage (2.7V to 3.6V).
2. SN74HCT245: Octal bus transceiver with similar functionality, compatible with TTL logic levels.
3. SN74LVCH16245A: 16-bit bus transceiver with voltage level translation, suitable