LTC4305IDHD#PBF

Product Overview

Category

LTC4305IDHD#PBF belongs to the category of I2C bus buffers and level shifters.

Use

It is primarily used for buffering and level shifting signals in I2C bus applications.

Characteristics

• Supports bidirectional data transfer between low voltage and high voltage I2C buses.
• Provides level shifting capability for I2C clock (SCL) and data (SDA) lines.
• Compatible with standard-mode, fast-mode, and fast-mode plus I2C protocols.
• Operates over a wide supply voltage range from 1.65V to 5.5V.
• Offers high noise immunity and robustness against bus contention.
• Features built-in rise time acceleration circuitry for improved performance.

Package

LTC4305IDHD#PBF is available in a 16-pin DFN (Dual Flat No-Lead) package.

Essence

The essence of LTC4305IDHD#PBF lies in its ability to enable reliable communication between low voltage and high voltage I2C devices by providing level shifting and buffering functions.

Packaging/Quantity

This product is typically packaged in reels or tubes, containing a specific quantity per package. Please refer to the manufacturer's datasheet for detailed packaging information.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 400kHz
• Maximum Data Rate: 1Mbps
• Input/Output Logic Compatibility: 1.8V to 5V

Detailed Pin Configuration

The LTC4305IDHD#PBF has the following pin configuration:

1. SDA1: Input/Output for I2C data line of the low voltage side.
2. SCL1: Input/Output for I2C clock line of the low voltage side.
3. GND: Ground reference.
4. VCC: Supply voltage input.
5. SDA2: Input/Output for I2C data line of the high voltage side.
6. SCL2: Input/Output for I2C clock line of the high voltage side.
7. A0: Address selection pin (logic level determines I2C address).
8. A1: Address selection pin (logic level determines I2C address).
9. EN: Enable pin to control the operation of the device.
10. FLT: Fault output indicating bus contention or excessive capacitance.
11. NC: No connection.
12. NC: No connection.
13. NC: No connection.
14. NC: No connection.
15. NC: No connection.
16. NC: No connection.

Functional Features

• Bidirectional buffering and level shifting between low voltage and high voltage I2C buses.
• Automatic rise time acceleration for improved signal integrity.
• Built-in fault detection and reporting for bus contention and excessive capacitance.
• Compatible with various I2C protocols and operating voltages.
• Low power consumption and wide supply voltage range.

Advantages and Disadvantages

Advantages

• Enables communication between devices operating at different voltage levels.
• Provides robustness against bus contention and excessive capacitance.
• Supports multiple I2C protocols and offers compatibility with various operating voltages.
• Compact package size and low power consumption.

Disadvantages

• Limited maximum clock frequency and data rate compared to some other I2C buffers.
• Requires careful consideration of address selection for proper configuration.

Working Principles

LTC4305IDHD#PBF works by monitoring the I2C bus lines on both the low voltage and high voltage sides. It buffers and level shifts the signals to ensure proper communication between devices operating at different voltage levels. The device automatically accelerates the rise time of the signals, improving signal integrity and reducing errors. It also detects bus contention and excessive capacitance, providing a fault output for error reporting.

Detailed Application Field Plans

LTC4305IDHD#PBF finds applications in various fields where I2C communication is required between devices operating at different voltage levels. Some potential application areas include:

1. Industrial automation: Enabling communication between low voltage microcontrollers and high voltage sensors or actuators.
2. Consumer electronics: Facilitating communication between low voltage control circuits and high voltage display panels or audio systems.
3. Automotive systems: Level shifting signals between low voltage automotive control units and high voltage sensors or actuators.
4. Medical devices: Allowing communication between low voltage medical instruments and high voltage monitoring or diagnostic equipment.

These are just a few examples, and the versatility of LTC4305IDHD#PBF makes it suitable for a wide range of applications.

Detailed and Complete Alternative Models

• PCA9306: Similar bidirectional I2C bus buffer with level shifting capability.
• TX