SN74BCT2245DBRG4

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: Translates signals between two voltage domains
• 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: 6.5ns (typical)
• Output Drive Capability: ±24mA
• ESD Protection: >2000V (Human Body Model)

Detailed Pin Configuration

The SN74BCT2245DBRG4 has a total of 20 pins, which are divided into two groups: A and B. Each group consists of 8 bidirectional I/O pins and 2 control pins.

Group A:

• Pin 1: OEAB (Output Enable for Group A)
• Pin 2: DIR (Direction Control)
• Pins 3-10: A1-A8 (Bidirectional I/O pins for Group A)

Group B:

• Pin 11: OEBA (Output Enable for Group B)
• Pin 12: GND (Ground)
• Pins 13-20: B1-B8 (Bidirectional I/O pins for Group B)

Functional Features

• Bidirectional voltage-level translation between two independent buses
• Supports mixed-voltage systems (e.g., 3.3V and 5V)
• Non-inverting outputs for both input and output data
• 3-state outputs allow multiple devices to share a common bus
• High-speed operation for efficient data transfer

Advantages and Disadvantages

Advantages:

• Enables seamless communication between different voltage domains
• Supports various applications with mixed-voltage requirements
• Provides reliable bidirectional data transmission
• High-speed operation enhances system performance

Disadvantages:

• Limited number of I/O pins (8 per group)
• Requires careful consideration of voltage compatibility

Working Principles

The SN74BCT2245DBRG4 is designed to translate signals between two voltage domains. It utilizes a direction control pin (DIR) to determine the flow of data between Group A and Group B. When DIR is set to logic high, data flows from Group A to Group B, and when DIR is set to logic low, data flows in the opposite direction.

The output enable pins (OEAB and OEBA) allow the user to disable the outputs, effectively placing them in a high-impedance state. This feature enables multiple devices to share a common bus without interfering with each other.

Detailed Application Field Plans

The SN74BCT2245DBRG4 is commonly used in various applications that require voltage-level translation. Some typical application fields include:

1. Microcontroller interfacing: The IC facilitates communication between microcontrollers operating at different voltage levels, enabling seamless integration into mixed-voltage systems.

2. Industrial automation: It is utilized in industrial control systems where different modules or devices operate at different voltage levels, ensuring smooth data exchange.

3. Communication systems: The IC plays a crucial role in communication systems, allowing interoperability between devices with varying voltage requirements, such as UART, SPI, or I2C interfaces.

4. Automotive electronics: In automotive applications, where different subsystems may operate at different voltages, the IC ensures reliable data transfer between these subsystems.

Detailed and Complete Alternative Models

1. TXB0108PWR: 8-bit bidirectional voltage-level translator with automatic direction sensing.
2. PCA9306DCTR: Dual bidirectional I2C-bus and SMBus voltage-level translator.
3. SN74LVC4245APW: Octal bus transceiver with configurable voltage translation and 3-state outputs.

These alternative models offer similar functionality to the SN74BCT2245DBRG4 and can be considered as alternatives based on specific application requirements.

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