LTC4318CUF#TRPBF

Specialized Overview

The LTC4318CUF#TRPBF is a dual-channel I2C/SMBus address translator housed in a 20-lead 4mm × 4mm plastic QFN package. It operates with an input supply voltage range of 2.25V to 5.5V and features a typical quiescent current of 2mA when enabled, dropping to 350µA in standby. The device supports a maximum SCLIN clock frequency of 400kHz and includes a pass-through mode for general call addressing. It provides ±4kV HBM ESD ruggedness and level translation capabilities for 2.5V, 3.3V, and 5V buses.

Specialized Feature Summary

• Resistor-configurable address translation allows multiple slaves with identical hardwired addresses to coexist on the same bus without software programming.
• Integrated hot swap logic with precharge circuitry prevents SDA and SCL corruption during live board insertion and removal.
• Automatic recovery from abnormal bus conditions, including stuck bus timeout and premature STOP bits.

Specialized Applications

• Servers
• Telecom
• I2C Address Expansion

Specialized Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure the order matches the required lead-free finish specifications provided by Analog Devices.

Specialized Selection Notes

Select this component when two independent I2C channels requiring address translation are needed. Verify that the application utilizes standard I2C or SMBus protocols supported by the device, excluding those requiring PEC or 10-bit addressing.

Specialized Part Context

This part belongs to the LTC4318 family of dual-channel address translators. It shares functional similarities with single-channel variants like the LTC4316 but offers expanded connectivity for complex bus architectures requiring simultaneous address mapping.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.