LTC4305IDHD#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Level Translator and Buffer for I2C Bus Applications

Characteristics: - Bidirectional buffer - Compatible with I2C bus standards - Supports voltage translation between different I2C bus levels - Provides buffering and isolation between devices operating at different voltages - Prevents bus lock-up and data corruption during live insertion or removal of cards - Minimizes bus loading and capacitance - Enables longer bus lengths and higher bus speeds - Protects against excessive bus currents - Supports hot-swapping capability

Package: DFN-10 (3mm x 3mm), RoHS compliant

Essence: The LTC4305IDHD#TRPBF is an integrated circuit designed to provide level translation and buffering for I2C bus applications. It allows communication between devices operating at different voltage levels, ensuring reliable data transfer and preventing bus lock-up.

Packaging/Quantity: The LTC4305IDHD#TRPBF is typically available in reels containing 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: 20ns (maximum)
• Input Capacitance: 4pF (typical)
• Output Capacitance: 6pF (typical)

Pin Configuration

The LTC4305IDHD#TRPBF features a 10-pin DFN package with the following pin configuration:

```

---

| | --| A1 V+ |-- Vcc --| A2 SDA|-- I2C Data --| A3 SCL|-- I2C Clock --| A4 GND|-- Ground --| A5 B1|-- Bus 1 --| A6 B2|-- Bus 2 --| A7 AD0 |-- Address Select --| A8 AD1 |-- Address Select --|___________| ```

Functional Features

• Bidirectional voltage level translation between two I2C buses
• Automatic direction sensing and control
• Prevents bus lock-up and data corruption during live insertion or removal of cards
• Provides buffering and isolation between devices operating at different voltages
• Minimizes bus loading and capacitance, enabling longer bus lengths and higher speeds
• Protects against excessive bus currents
• Supports hot-swapping capability

Advantages and Disadvantages

Advantages: - Enables communication between devices with different voltage levels - Prevents bus lock-up and data corruption - Low quiescent current consumption - Compact package size - Easy to use and integrate into existing designs - Supports hot-swapping capability

Disadvantages: - Maximum data rate limited to 400kHz - Limited to I2C bus applications

Working Principles

The LTC4305IDHD#TRPBF operates by automatically sensing the direction of the I2C bus and controlling the bidirectional voltage translation. It uses a combination of internal circuitry and external pull-up resistors to ensure proper signal levels and prevent bus lock-up. The device actively buffers and isolates the two I2C buses, allowing communication between devices operating at different voltage levels.

Application Field Plans

The LTC4305IDHD#TRPBF is commonly used in various applications that require level translation and buffering for I2C bus communication. Some potential application fields include:

1. Industrial Control Systems: Enables communication between devices operating at different voltage levels in industrial automation systems.
2. Consumer Electronics: Facilitates communication between components with varying I2C bus voltages in consumer electronic devices.
3. Automotive Electronics: Provides level translation and buffering for I2C bus communication in automotive control modules and infotainment systems.
4. Medical Devices: Ensures reliable data transfer between medical devices operating at different voltage levels, enhancing patient monitoring and diagnostics.

Alternative Models

1. PCA9306: Bidirectional I2C-bus and SMBus voltage-level translator with automatic direction sensing.
2. TXB0108: 8-bit bidirectional voltage-level translator with automatic direction sensing.
3. BSS138: N-channel enhancement mode MOSFET used as a level shifter or voltage translator.

These alternative models offer similar functionality to the LTC4305IDHD#TRPBF and can be considered as alternatives depending on specific application requirements.

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