LTC4317IDHC#PBF

Specialized Overview

The LTC4317IDHC#PBF is a dual-channel I2C/SMBus address translator manufactured by Analog Devices Inc. It operates within an input supply voltage range of 2.25V to 5.5V and features a quiescent current of 0.8mA when enabled. The device supports a maximum SCLIN clock frequency of 400kHz with a typical SDAOUT fall delay of 170ns. It utilizes a 16-lead DFN package measuring 5mm × 3mm, designed for the -40°C to 85°C temperature range.

Specialized Feature Summary

• Translates hardwired addresses of I2C or SMBus slave devices using discrete resistors without software programming
• Incorporates pass-through mode to disable translation and allow general call addressing
• Automatically recovers from abnormal bus conditions such as stuck low signals or premature STOP bits
• Supports hot swap operations with precharge circuitry to prevent bus corruption during live insertion

Specialized Applications

• I2C and SMBus address expansion
• Servers and telecom equipment
• Allowing multiple slaves with identical addresses to coexist on the same bus

Specialized Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tube packaging. Confirm the IDHC variant meets the required industrial temperature range of -40°C to 85°C. Ensure the 16-lead DFN footprint matches the PCB layout specifications provided in the datasheet before finalizing procurement orders.

Specialized Selection Notes

Select this component when multiple I2C devices share the same hardware address and require real-time translation. The dual-channel architecture allows independent configuration for two sets of slaves. Verify that the application does not require unsupported protocols like PEC or 10-bit addressing, which are explicitly excluded from device capabilities.

Specialized Part Context

This part belongs to the LTC4317 family of address translators. It differs from the LTC4316, which provides only one output channel, and the LTC4318, which offers two input channels. The IDHC suffix specifies the industrial temperature grade and the specific 16-lead plastic DFN package format used for surface mount assembly.

Specialized Replacement Considerations

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