LTC4309CDE#PBF

Product Overview

• Category: Integrated Circuit
• Use: Bus Buffer
• Characteristics: High-Speed I2C Bus Buffer with Stuck Bus Recovery
• Package: 8-Lead DFN (3mm × 3mm)
• Essence: The LTC4309CDE#PBF is a high-speed I2C bus buffer designed to provide level shifting and buffering for I2C bus signals. It allows multiple devices to communicate on the same bus while isolating them from each other, preventing bus lock-up in case of a stuck bus condition.
• Packaging/Quantity: The LTC4309CDE#PBF is available in a 8-Lead DFN package and is sold individually.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• I2C Bus Compatibility: Standard-mode, Fast-mode, Fast-mode Plus, and High-speed mode
• Maximum Frequency: 400kHz
• Quiescent Current: 1.5mA
• Input Logic Thresholds: Compatible with 1.8V, 2.5V, 3.3V, and 5V logic

Detailed Pin Configuration

The LTC4309CDE#PBF has the following pin configuration:

1. SDA: Serial Data Input/Output
2. SCL: Serial Clock Input
3. VCC: Supply Voltage
4. GND: Ground
5. A0: Address Input Bit 0
6. A1: Address Input Bit 1
7. EN: Enable Input
8. FLT: Fault Output

Functional Features

• Provides level shifting and buffering for I2C bus signals
• Supports multiple devices on the same bus
• Prevents bus lock-up in case of a stuck bus condition
• Automatic recovery from stuck bus condition
• Compatible with various I2C bus modes and logic voltage levels
• Low quiescent current for power efficiency

Advantages and Disadvantages

Advantages: - Enables reliable communication between multiple devices on the same I2C bus - Protects against bus lock-up in case of a stuck bus condition - Supports various I2C bus modes and logic voltage levels - Automatic recovery feature enhances system reliability

Disadvantages: - None identified

Working Principles

The LTC4309CDE#PBF acts as a buffer and level shifter for I2C bus signals. It isolates multiple devices connected to the bus, preventing them from interfering with each other's communication. In case of a stuck bus condition, where one device holds the bus low, the LTC4309CDE#PBF automatically detects this condition and disconnects the faulty device, allowing the bus to recover and resume normal operation.

Detailed Application Field Plans

The LTC4309CDE#PBF is commonly used in applications where multiple devices need to communicate on the same I2C bus. Some typical application fields include:

1. Industrial Control Systems: Used to connect various sensors, actuators, and control modules in industrial automation systems.
2. Consumer Electronics: Enables communication between different components in consumer electronic devices such as TVs, audio systems, and gaming consoles.
3. Automotive Electronics: Facilitates communication between different modules in automotive systems, including infotainment systems, climate control, and advanced driver-assistance systems (ADAS).
4. Medical Devices: Allows multiple medical devices to communicate on the same bus, enabling seamless integration and data exchange.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LTC4309CDE#PBF are:

1. PCA9517: I2C Bus Repeater with Level Shifting
2. TCA980x: I2C Bus Buffer with Stuck Bus Recovery
3. P82B715: I2C Bus Extender with Stuck Bus Recovery

These alternative models provide level shifting, buffering, and stuck bus recovery features, making them suitable replacements for the LTC4309CDE#PBF in various applications.

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