LTC4308CMS8#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Level Translator and Buffer

Characteristics: - Bidirectional I2C Bus Voltage Level Shifter - Compatible with I2C and SMBus Standards - Supports Standard Mode, Fast Mode, and Fast Mode Plus - Low Quiescent Current Consumption - Small Package Size (MSOP-8) - RoHS Compliant

Package: MSOP-8

Essence: The LTC4308CMS8#PBF is a level translator and buffer IC designed for bidirectional voltage translation between two I2C buses operating at different voltage levels.

Packaging/Quantity: The LTC4308CMS8#PBF is available in tape and reel packaging. Each reel contains 2500 units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Maximum Data Rate: 400kHz
• Quiescent Current: 1.5μA (typical)
• Rise/Fall Time: 10ns (maximum)
• Input Capacitance: 3pF (typical)
• Output Capacitance: 4pF (typical)

Pin Configuration

The LTC4308CMS8#PBF has the following pin configuration:

```

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| | --| A1 Vcc|-- --| A0 SDA |-- --| GND SCL |-- --| OE INT |-- --| B1 SDA |-- --| B0 SCL |-- --| NC |-- |___________| ```

Functional Features

• Bidirectional voltage level shifting between two I2C buses
• Automatic bus buffer and control
• Compatible with I2C and SMBus standards
• Supports multiple bus capacitance configurations
• Provides voltage level translation for standard mode, fast mode, and fast mode plus

Advantages and Disadvantages

Advantages: - Low quiescent current consumption - Small package size allows for space-saving designs - Wide supply voltage range enables compatibility with various systems - Supports high-speed data rates - RoHS compliant, ensuring environmental friendliness

Disadvantages: - Limited to I2C and SMBus applications - Maximum data rate of 400kHz may not be sufficient for some high-speed applications

Working Principles

The LTC4308CMS8#PBF acts as a bidirectional voltage level translator between two I2C buses operating at different voltage levels. It automatically buffers and controls the bidirectional data transfer, allowing seamless communication between devices with different voltage requirements.

Detailed Application Field Plans

The LTC4308CMS8#PBF is commonly used in various applications that require voltage level translation in I2C and SMBus interfaces. Some typical application fields include:

1. Consumer Electronics: Used in smartphones, tablets, and other portable devices to enable communication between different voltage domains.
2. Industrial Automation: Facilitates communication between sensors, actuators, and microcontrollers operating at different voltage levels.
3. Automotive Systems: Enables data exchange between various automotive modules with different voltage requirements, such as infotainment systems, body control units, and engine management systems.

Detailed and Complete Alternative Models

1. PCA9306: Bidirectional I2C-bus and SMBus voltage-level translator with automatic direction sensing and reset.
2. TXB0104: 4-bit bidirectional voltage-level translator with automatic direction sensing.
3. BSS138: N-channel enhancement mode MOSFET used for level shifting applications.

These alternative models provide similar functionality to the LTC4308CMS8#PBF and can be considered as alternatives based on specific application requirements.

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