LTC4309CGN#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Bus Buffer
• Characteristics: High-Speed I2C Bus Buffer with Hot Swap Capability
• Package: 16-Lead SSOP (Shrink Small Outline Package)
• Essence: The LTC4309CGN#PBF is a high-speed I2C bus buffer designed to provide level shifting and hot swap capability for I2C buses. It allows multiple devices to share the same bus without causing data corruption or bus contention.
• Packaging/Quantity: The LTC4309CGN#PBF is available in a 16-Lead SSOP package and is sold individually.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Maximum Frequency: 400kHz
• Quiescent Current: 1.5mA (typical)

Pin Configuration

The LTC4309CGN#PBF has a total of 16 pins. The pin configuration is as follows:

1. SDA1: Input/Output for I2C Bus 1
2. SCL1: Input for Clock Signal of I2C Bus 1
3. GND: Ground
4. SDA2: Input/Output for I2C Bus 2
5. SCL2: Input for Clock Signal of I2C Bus 2
6. VCC: Supply Voltage
7. EN: Enable Pin
8. AD0: Address Select Bit 0
9. AD1: Address Select Bit 1
10. ADR: Address Select Bit 2
11. SDAOUT: Output for Buffered I2C Data
12. SDAIN: Input for I2C Data
13. SCLIN: Input for I2C Clock Signal
14. SDAOUT2: Output for Buffered I2C Data (Second Channel)
15. SDAIN2: Input for I2C Data (Second Channel)
16. SCLIN2: Input for I2C Clock Signal (Second Channel)

Functional Features

• Level shifting between two I2C buses with different voltage levels.
• Hot swap capability allows devices to be added or removed from the bus without disrupting communication.
• Automatic bus arbitration and collision detection.
• Low quiescent current for power efficiency.
• Supports high-speed I2C communication up to 400kHz.

Advantages and Disadvantages

Advantages: - Enables reliable communication between devices with different voltage levels. - Protects devices from bus contention and data corruption. - Simplifies design by eliminating the need for external level shifters. - Hot swap capability allows for easy device insertion/removal.

Disadvantages: - Limited to I2C bus applications. - May require additional components for specific system requirements.

Working Principles

The LTC4309CGN#PBF acts as a buffer between two I2C buses with different voltage levels. It uses level shifting techniques to ensure proper communication between devices operating at different voltages. The device automatically detects bus collisions and arbitrates between multiple devices trying to access the bus simultaneously. The hot swap capability allows devices to be added or removed from the bus without causing disruptions or data corruption.

Detailed Application Field Plans

The LTC4309CGN#PBF is commonly used in various applications that require level shifting and hot swap capability for I2C buses. Some of the typical application fields include:

1. Industrial automation systems
2. Consumer electronics
3. Automotive electronics
4. Communication equipment
5. Medical devices

Detailed and Complete Alternative Models

• LTC4309A-1CGN#PBF: Similar to LTC4309CGN#PBF, but with different address select options.
• LTC4309B-2CGN#PBF: Similar to LTC4309CGN#PBF, but with extended temperature range.

These alternative models offer similar functionality and can be used as replacements or alternatives to the LTC4309CGN#PBF in specific applications.

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