LTC4304CMS#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Level Translator and Buffer

Characteristics: - Bidirectional I2C Bus Buffer - Compatible with I2C Standard Mode, Fast Mode, and Fast Mode Plus - Supports Clock Stretching - Low Voltage Operation (1.65V to 5.5V) - High Noise Immunity - Small Package Size (MSOP-10)

Package: MSOP-10

Essence: The LTC4304CMS#PBF is a bidirectional I2C bus buffer designed to provide level translation and buffering for I2C communication. It allows devices operating at different voltage levels to communicate on the same I2C bus.

Packaging/Quantity: The LTC4304CMS#PBF is available in a small MSOP-10 package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Maximum I2C Bus Voltage: 6V
• Maximum Sink/Source Current: ±50mA
• Maximum Capacitive Load: 400pF

Pin Configuration

The LTC4304CMS#PBF has a total of 10 pins arranged as follows:

```

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| | --| VCC SDA |-- --| GND SCL |-- --| A1 AD0 |-- --| A0 AD1 |-- |___________| ```

Pin Description: - VCC: Power supply pin (+1.65V to +5.5V) - GND: Ground pin (0V) - SDA: Serial Data Input/Output pin - SCL: Serial Clock Input pin - A1, A0: Address Select pins - AD0, AD1: Device Address pins

Functional Features

1. Bidirectional Level Translation: The LTC4304CMS#PBF allows bidirectional translation of I2C signals between devices operating at different voltage levels.
2. Buffering: It provides buffering for the I2C bus, isolating the devices from bus capacitance and reducing loading effects.
3. Clock Stretching Support: The LTC4304CMS#PBF supports clock stretching, allowing devices to hold the clock line low to slow down the communication speed if needed.
4. Noise Immunity: It offers high noise immunity, ensuring reliable data transmission in noisy environments.

Advantages and Disadvantages

Advantages: - Enables communication between devices with different voltage levels on the same I2C bus. - Provides buffering and isolation, reducing loading effects. - Supports clock stretching for flexible timing requirements. - High noise immunity ensures reliable data transmission.

Disadvantages: - Limited to I2C bus applications only. - Requires careful consideration of voltage level compatibility between devices.

Working Principles

The LTC4304CMS#PBF operates by monitoring the SDA and SCL lines of the I2C bus. It detects the direction of the bus and translates the logic levels accordingly. When a device with a higher voltage level is driving the bus, the LTC4304CMS#PBF acts as a buffer, isolating the lower voltage devices from the bus capacitance. Similarly, when a lower voltage device is driving the bus, the LTC4304CMS#PBF translates the logic levels to match the higher voltage devices.

Application Field Plans

The LTC4304CMS#PBF finds applications in various scenarios where level translation and buffering are required in I2C bus communication. Some potential application fields include: - Mixed-voltage I2C systems - Communication between microcontrollers and sensors operating at different voltage levels - Industrial automation systems - Consumer electronics

Alternative Models

1. PCA9306: Bidirectional I2C Bus Voltage-Level Translator with Automatic Direction Sensing
2. TXB0108: 8-Bit Bidirectional Voltage-Level Translator with Automatic Direction Sensing
3. BSS138: N-Channel Logic Level Enhancement Mode Field Effect Transistor (FET)

These alternative models offer similar functionality to the LTC4304CMS#PBF and can be considered as alternatives depending on specific requirements.

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