TXB0102DCUT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Level Shifter
• Characteristics: Bi-directional, 2-bit voltage level translation
• Package: SOT-23-6
• Essence: Voltage level shifting between two different logic levels
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage: 1.2V to 3.6V
• Logic Voltage Levels: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 4.5ns (typical)
• Output Current: ±24mA
• Input Capacitance: 3pF (typical)

Detailed Pin Configuration

The TXB0102DCUT IC has a total of 6 pins:

1. VCCA: Power supply for the A-side logic (1.2V to 3.6V)
2. B1: Bi-directional data signal input/output for channel 1
3. B2: Bi-directional data signal input/output for channel 2
4. OE: Output enable pin (active low)
5. VCCB: Power supply for the B-side logic (1.65V to 5.5V)
6. GND: Ground reference

Functional Features

• Bi-directional voltage level shifting between two different logic levels
• Supports bidirectional communication between devices operating at different voltage levels
• Automatic direction sensing eliminates the need for direction control signals
• Low power consumption
• High-speed operation with minimal propagation delay
• ESD protection on all pins

Advantages and Disadvantages

Advantages:

• Easy integration into existing systems
• Simplifies interfacing between devices with different voltage levels
• Automatic direction sensing simplifies design and reduces complexity
• High-speed operation allows for efficient data transfer

Disadvantages:

• Limited to 2-bit voltage level translation
• Not suitable for applications requiring more than 2-bit translation
• May not be compatible with all voltage level combinations

Working Principles

The TXB0102DCUT is a bidirectional level shifter that allows for voltage translation between two different logic levels. It utilizes a voltage level translator circuitry that automatically senses the direction of data flow and adjusts the voltage levels accordingly.

When the OE (Output Enable) pin is low, the device is enabled, and the voltage translation occurs. The B1 and B2 pins are bidirectional data signal lines that can be connected to devices operating at different voltage levels. The VCCA and VCCB pins provide power supply to the A-side and B-side logic, respectively.

The level shifting is achieved through a combination of MOSFETs and control circuitry, ensuring minimal propagation delay and high-speed operation. ESD protection is also incorporated on all pins to safeguard against electrostatic discharge.

Detailed Application Field Plans

The TXB0102DCUT is widely used in various applications where voltage level translation is required. Some of the common application fields include:

1. I2C Communication: The IC enables communication between microcontrollers operating at different voltage levels in I2C bus systems.
2. UART/Serial Communication: It facilitates data exchange between devices with varying voltage levels in UART or serial communication interfaces.
3. Sensor Interfacing: The level shifter allows sensors operating at different voltage levels to interface with microcontrollers or other processing units.
4. Logic Level Conversion: It is utilized in digital systems where logic signals need to be translated between different voltage domains.
5. Battery-Powered Devices: The IC is suitable for portable devices powered by batteries, where efficient voltage level translation is crucial.

Detailed and Complete Alternative Models

1. SN74LV1T34DBVR: Single-bit voltage level translator with similar characteristics and package (SOT-23-5).
2. PCA9306DCUR: Dual-bit bidirectional I2C-bus and SMBus voltage level translator with automatic direction sensing (SOT-23-8).
3. TXS0102DCTR: 2-bit bidirectional voltage level translator with higher output current capability (SOT-23-6).

These alternative models offer similar functionality and can be considered as alternatives to the TXB0102DCUT based on specific requirements and design constraints.

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