LTC4317CDHC#PBF

Specialized Overview

The LTC4317CDHC#PBF is a dual-channel I2C/SMBus address translator manufactured by Analog Devices Inc. It enables multiple slave devices with identical hardwired addresses to coexist on the same bus segment through hardware-configurable translation. The device features two independent output channels sharing a common input interface, reducing pin count and package size. It supports supply voltages from 2.25V to 5.5V and includes level translation capabilities for mixed-voltage buses (2.5V, 3.3V, and 5V). Key electrical parameters include a maximum SCL clock frequency of 400 kHz, an input supply current of 0.8 mA at VCC = 3.3V, and a stuck bus timeout of 30 ms. The component is housed in a 16-lead DFN package measuring 5mm × 3mm.

Specialized Feature Summary

• Hardware-configurable address translation using external resistive dividers without software programming
• Dual output channels allowing simultaneous translation for two distinct sets of slave devices
• Integrated hot swap support with precharge circuitry to prevent bus corruption during live insertion
• Automatic recovery from abnormal bus conditions such as stuck low/high lines or premature stop bits

Specialized Applications

• I2C and SMBus address expansion in server systems
• Telecommunications equipment requiring multiple identical peripheral modules
• Systems supporting bus hot swap operations

Specialized Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tube packaging. Confirm the temperature grade 'C' corresponds to the commercial range of 0°C to 70°C. Ensure the 16-lead DHC package dimensions match the design footprint requirements. Cross-reference the manufacturer part number with official distributor catalogs to confirm availability status.

Specialized Selection Notes

Select this component when multiple I2C slaves share the same base address and require real-time translation. Use the XORH and XORL pins with precise 1% tolerance resistors to define the translation byte. Ensure the VCC pin is connected to the lower of the two bus supply voltages if level shifting between different voltage domains is required.

Specialized Part Context

The LTC4317 belongs to Analog Devices' family of 2-Wire Bus Buffers and Translators. It complements parts like the LTC4300 series hot swap buffers and LTC4302 addressable buffers. Unlike multiplexers, it focuses specifically on resolving address conflicts within a single bus topology while maintaining signal integrity across voltage levels.

Specialized Replacement Considerations

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