LTC4301IDD#PBF

Product Overview

Category

LTC4301IDD#PBF belongs to the category of I2C bus buffers.

Use

The LTC4301IDD#PBF is used to buffer and level-shift I2C bus signals, allowing multiple devices with different voltage levels to communicate on the same bus.

Characteristics

• Voltage Level Translation: The LTC4301IDD#PBF supports voltage level translation between two different I2C buses.
• Bidirectional Buffering: It provides bidirectional buffering for both the SDA (data) and SCL (clock) lines.
• Low Quiescent Current: The device has a low quiescent current, making it suitable for power-sensitive applications.
• High Noise Immunity: The LTC4301IDD#PBF offers high noise immunity, ensuring reliable communication in noisy environments.

Package

LTC4301IDD#PBF is available in a 10-lead DFN package.

Essence

The essence of LTC4301IDD#PBF lies in its ability to enable communication between I2C devices operating at different voltage levels by providing level shifting and buffering capabilities.

Packaging/Quantity

The LTC4301IDD#PBF is typically sold in reels containing 2500 units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Maximum Clock Frequency: 400kHz
• Quiescent Current: 1.5μA (typical)
• Input High Voltage (VIH): 0.7VDD
• Input Low Voltage (VIL): 0.3VDD

Detailed Pin Configuration

The LTC4301IDD#PBF features the following pin configuration:

1. VCC - Power supply input
2. GND - Ground
3. SDA1 - I2C bus data line 1
4. SCL1 - I2C bus clock line 1
5. SDA2 - I2C bus data line 2
6. SCL2 - I2C bus clock line 2
7. AD0 - Address select input
8. AD1 - Address select input
9. EN - Enable pin
10. NC - No connection

Functional Features

• Bidirectional Voltage Level Translation: The LTC4301IDD#PBF provides bidirectional voltage level translation between two I2C buses, allowing devices operating at different voltage levels to communicate seamlessly.
• Automatic Bus Buffering: It automatically buffers the SDA and SCL lines, isolating the devices on one side of the buffer from those on the other side.
• Stuck Bus Recovery: The device features a stuck bus recovery mechanism that prevents bus lock-up in case of faulty or shorted devices.

Advantages and Disadvantages

Advantages

• Enables communication between I2C devices with different voltage levels.
• Low quiescent current makes it suitable for power-sensitive applications.
• High noise immunity ensures reliable communication in noisy environments.
• Automatic bus buffering simplifies system design.

Disadvantages

• Limited to a maximum clock frequency of 400kHz.
• Requires additional address select pins for multi-device configurations.

Working Principles

The LTC4301IDD#PBF operates by monitoring the voltage levels on the SDA and SCL lines of both I2C buses. It uses level shifting circuitry to translate the voltage levels between the two buses, ensuring compatibility. The device also incorporates automatic bus buffering, which isolates the devices on each side of the buffer to prevent contention and data corruption.

Detailed Application Field Plans

The LTC4301IDD#PBF finds application in various scenarios where I2C devices with different voltage levels need to communicate. Some common application fields include:

1. Mixed Voltage Level Systems: It is used in systems where I2C devices operating at different voltage levels coexist, such as in industrial control systems and automotive electronics.
2. Battery-Powered Devices: The low quiescent current of LTC4301IDD#PBF makes it suitable for battery-powered devices that require efficient power management.
3. Communication Modules: It is employed in communication modules that interface between microcontrollers and peripheral devices operating at different voltage levels.

Detailed and Complete Alternative Models

1. PCA9306 - Dual bidirectional I2C bus voltage level translator with automatic direction sensing.
2. TXB0108 - 8-bit bidirectional voltage-level translator with automatic direction sensing.
3. BSS138 - Single N-channel logic level enhancement mode field-effect transistor (FET) used for level shifting applications.

These alternative models offer similar functionality to the LTC4301IDD#PBF and can be considered based on specific requirements and design constraints.

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