SN74ABT2245DBRG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Transceiver
• Characteristics: High-speed, bidirectional voltage-level translator
• Package: 20-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Transfers data between two bidirectional bus systems with different voltage levels
• Packaging/Quantity: Tape and Reel, 2500 units per reel

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
• Propagation Delay Time: 3.8ns (typical)
• Output Drive Capability: ±12mA

Detailed Pin Configuration

The SN74ABT2245DBRG4 has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

• Bidirectional voltage-level translation between two bus systems
• Automatic direction control based on DIR pin
• High-speed operation with minimal propagation delay
• Output drive capability for driving capacitive loads

Advantages and Disadvantages

Advantages: - Enables communication between bus systems with different voltage levels - Fast data transfer with low propagation delay - Compact package size for space-constrained applications

Disadvantages: - Limited to a specific number of data bus lines (8 in this case) - Requires careful consideration of voltage compatibility between bus systems

Working Principles

The SN74ABT2245DBRG4 is a bidirectional voltage-level translator that allows data transfer between two bus systems operating at different voltage levels. The direction of data flow is controlled by the DIR pin. When DIR is high, data flows from Bus A to Bus B, and when DIR is low, data flows from Bus B to Bus A.

The IC uses a combination of level-shifting circuitry and tri-state buffers to achieve bidirectional data transfer. It ensures that the voltage levels of the input and output signals are compatible with the respective bus systems.

Detailed Application Field Plans

The SN74ABT2245DBRG4 finds applications in various fields where there is a need to interface between bus systems operating at different voltage levels. Some common application areas include:

1. Microcontroller interfacing: It enables communication between microcontrollers operating at different voltage levels, allowing them to exchange data seamlessly.
2. Industrial automation: The IC facilitates communication between different modules or devices within an industrial automation system, which may operate at different voltage levels.
3. Communication systems: It can be used in communication systems to interface between different buses, such as UART, SPI, or I2C, that operate at different voltage levels.
4. Automotive electronics: The IC can be employed in automotive applications where different subsystems or modules require voltage-level translation for data exchange.

Detailed and Complete Alternative Models

1. SN74LVC4245A: This is a similar bidirectional voltage-level translator with 8-bit data bus capability. It operates at a lower supply voltage range of 1.65V to 3.6V.
2. SN74AVC4T245: This is a compact bidirectional voltage-level translator with 4-bit data bus capability. It is designed for space-constrained applications and operates at a supply voltage range of 1.2V to 3.6V.
3. SN74HCT245: This is an octal bus transceiver with 8-bit data bus capability. It operates at a wider supply voltage range of 4.5V to 5.5V and is compatible with TTL logic levels.

These alternative models provide options with varying features and specifications to suit different application requirements.

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