LTC4310IDD-1#PBF

Overview

The LTC4310IDD-1#PBF is a hot-swappable I2C isolator manufactured by Analog Devices Inc. It provides bidirectional communication between two isolated buses, supporting both 100kHz and 400kHz I2C systems. The device operates on a supply voltage ranging from 3V to 5.5V with a maximum supply current of 8mA. It features a propagation delay of 170ns and an insulation voltage of 1500Vrms. The component is housed in a 10-pin DFN EP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Enables safe insertion or removal of modules into a live I2C bus without disrupting existing communication.
• Automatically generates clock pulses and a STOP bit to release the bus if it remains stuck low for 37ms.
• Provides electrical isolation between two distinct I2C domains using capacitive and magnetic coupling technologies.

Applications

• Hot-swappable industrial control systems requiring I2C connectivity
• Data acquisition modules connected to a live backplane bus
• Isolated sensor interfaces in high-voltage environments

Procurement Notes

Verify the specific suffix IDD-1 against the official Analog Devices datasheet to confirm the commercial temperature grade and DFN-10 package configuration. Ensure that the #PBF designation matches RoHS compliance requirements for your assembly process. Cross-reference the manufacturer part number with authorized distributors to confirm current availability status, as supply constraints may affect lead times.

Selection Notes

Select this component when bidirectional I2C isolation is required for hot-swap applications. It is suitable for systems operating at standard (100kHz) and fast (400kHz) modes. Consider the 1500Vrms isolation rating for safety barriers. Evaluate the 170ns propagation delay against system timing constraints. Compare against non-isolated buffers if isolation is not mandatory.

Part Context

This part belongs to the LTC4310 series of hot-swappable I2C isolators. It is designed to protect downstream devices during module insertion. The device integrates pull-up and pull-down drivers controlled by the EN pin. It differs from standard isolators by including bus recovery logic to handle stuck-low conditions automatically.

Replacement Considerations

LTC4310CMS-1#PBF offers the same functionality in an MSOP-10 package. LTC4310CDD-1#PBF provides identical performance in a DFN-10 package but may differ in thermal characteristics or pin pitch. Verify pinout compatibility before substitution.