LTC4309CGN#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: I2C Bus Buffer
• Characteristics: Low Voltage Level Shifting, Hot Swappable, High Noise Immunity
• Package: 16-Lead SSOP
• Essence: Buffering and Level Shifting for I2C Bus Communication
• Packaging/Quantity: Tape & Reel, 2500 units per reel

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)

Pin Configuration

The LTC4309CGN#TRPBF has a 16-lead SSOP package with the following pin configuration:

1. SDA1: I2C Data Input/Output for Channel 1
2. SCL1: I2C Clock Input for Channel 1
3. EN1: Enable Input for Channel 1
4. GND: Ground
5. VCC: Power Supply
6. SDA2: I2C Data Input/Output for Channel 2
7. SCL2: I2C Clock Input for Channel 2
8. EN2: Enable Input for Channel 2
9. ADR: Address Input
10. SDAOUT: Buffered I2C Data Output
11. SDAIN: Buffered I2C Data Input
12. SCLIN: Buffered I2C Clock Input
13. SCLLOUT: Buffered I2C Clock Output
14. ALERT: Alert Output
15. N/A: Not Connected
16. N/A: Not Connected

Functional Features

• Provides level shifting between two I2C buses operating at different voltage levels
• Allows hot swapping of I2C devices without disruption to the bus communication
• Provides high noise immunity for reliable data transmission

Advantages and Disadvantages

Advantages: - Enables seamless integration of I2C devices with different voltage requirements - Facilitates easy and safe replacement of I2C devices during operation - Enhances system reliability by minimizing the impact of noise on bus communication

Disadvantages: - Limited to a maximum clock frequency of 400kHz - Requires careful consideration of power supply voltage compatibility

Working Principles

The LTC4309CGN#TRPBF acts as a bidirectional buffer and level shifter for I2C bus communication. It allows two I2C buses operating at different voltage levels to communicate with each other seamlessly. The device monitors the bus lines for activity and provides buffering and level shifting as necessary to ensure proper signal integrity.

Detailed Application Field Plans

The LTC4309CGN#TRPBF finds applications in various fields where multiple I2C devices with different voltage requirements need to communicate. Some potential application areas include:

1. Industrial Automation: Enabling communication between I2C sensors and controllers operating at different voltage levels.
2. Automotive Electronics: Facilitating interaction between I2C-based components in vehicles with varying voltage levels.
3. Consumer Electronics: Supporting interoperability between I2C devices in smartphones, tablets, and other consumer electronic devices.

Detailed and Complete Alternative Models

1. PCA9306: Similar functionality with a smaller package size (8-pin SOIC).
2. TCA9517: Provides level shifting and voltage translation for multiple I2C buses.
3. TXB0104: Bidirectional voltage-level translator supporting I2C and other serial protocols.

These alternative models offer similar features and can be considered based on specific application requirements.

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