LTC4313CDD-2#PBF

Product Overview

Category

The LTC4313CDD-2#PBF belongs to the category of integrated circuits (ICs) and specifically falls under the family of I2C/SMBus devices.

Use

This product is primarily used for bus buffering and level shifting in I2C and SMBus systems. It enables multiple devices with different voltage levels to communicate seamlessly on the same bus.

Characteristics

• Bus Buffering: The LTC4313CDD-2#PBF acts as a buffer between the master and slave devices, ensuring reliable communication by isolating them from bus capacitance and noise.
• Level Shifting: It provides bidirectional level shifting between two I2C buses operating at different voltage levels, allowing compatibility between devices with varying voltage requirements.
• Hot-Swappable: The device supports hot-swapping, enabling devices to be added or removed from the bus without interrupting the operation of other devices.
• Low Quiescent Current: The LTC4313CDD-2#PBF has a low quiescent current, making it suitable for power-sensitive applications.
• High-Speed Operation: It supports high-speed mode (up to 400kHz) for fast data transfer.

Package and Quantity

The LTC4313CDD-2#PBF is available in a 10-lead DFN (Dual Flat No-Lead) package. It is supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• I2C Bus Voltage Range: 1.6V to 5.5V
• Maximum Data Rate: 400kHz
• Quiescent Current: 20μA (typical)
• Package Dimensions: 3mm x 3mm x 0.75mm

Pin Configuration

The LTC4313CDD-2#PBF features a 10-lead DFN package with the following pin configuration:

1. SDA1: I2C/SMBus Data Line 1
2. SCL1: I2C/SMBus Clock Line 1
3. GND: Ground
4. ADD: Address Input
5. SDA2: I2C/SMBus Data Line 2
6. SCL2: I2C/SMBus Clock Line 2
7. VCC: Supply Voltage
8. EN: Enable Pin
9. NC: No Connection
10. GND: Ground

Functional Features

• Bidirectional Buffering: The LTC4313CDD-2#PBF provides bidirectional buffering for both the I2C data and clock lines, ensuring proper signal integrity and voltage level translation.
• Automatic Bus Disconnect: It automatically disconnects the downstream bus when the upstream bus is idle, preventing contention and reducing power consumption.
• Stuck Bus Recovery: In case of a stuck bus condition, the device automatically resets the bus by disconnecting and reconnecting the downstream devices.
• Rise Time Accelerator: The LTC4313CDD-2#PBF features a rise time accelerator circuit that reduces the rise time of the buffered signals, improving overall system performance.

Advantages and Disadvantages

Advantages

• Enables communication between devices with different voltage levels on the same bus.
• Supports hot-swapping, allowing devices to be added or removed without disrupting the bus operation.
• Low quiescent current makes it suitable for power-sensitive applications.
• Provides automatic bus disconnect and stuck bus recovery features for enhanced reliability.
• High-speed operation supports fast data transfer.

Disadvantages

• Limited to I2C and SMBus applications, not suitable for other bus protocols.
• Requires careful consideration of voltage compatibility between devices connected to the bus.

Working Principles

The LTC4313CDD-2#PBF works by buffering and level shifting the I2C or SMBus signals between two buses operating at different voltage levels. It isolates the master and slave devices from the bus capacitance and noise, ensuring reliable communication. The device automatically disconnects the downstream bus when the upstream bus is idle, reducing power consumption and preventing contention. In case of a stuck bus condition, it resets the bus by disconnecting and reconnecting the downstream devices. The rise time accelerator circuit improves signal integrity and system performance.

Application Field Plans

The LTC4313CDD-2#PBF finds application in various fields where multiple devices with different voltage requirements need to communicate on an I2C or SMBus. Some potential application areas include:

1. Industrial Automation: Used in control systems where sensors, actuators, and controllers operate at different voltage levels.
2. Consumer Electronics: Enables communication between devices such