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Small green circuit board with two white connectors and a row of gold pins

LORDWORLD

LORDWORLD ISO1540 I2C Isolator Module 3.3V 1 MHz 8-pin

SKU CH-KRH4-VX8FT

Bidirectional I²C isolator module operating up to 1 MHz with STEMMA QT and Qwiic connectors plus an 8-pin header

  • Bidirectional I²C isolation protects sensitive circuits
  • ISO1540 chip handles 3.3 V and 5 V logic levels
  • STEMMA QT and Qwiic connectors enable quick wiring
  • 1 MHz operation suits standard and fast-mode buses

LORDWORLD ISO1540 I2C Isolator Module

The LORDWORLD ISO1540 module provides bidirectional I2C isolation for STEMMA QT and Qwiic compatible devices. It supports both 3.3V and 5V logic levels and operates at speeds up to 1 MHz. An 8-pin header allows straightforward integration into prototype circuits and embedded projects.

Isolation capacity and voltage headroom

The isolator comfortably handles standard I2C sensor chains and multi-board setups where ground loops or voltage mismatches occur. It runs out of headroom when bus speeds exceed 1 MHz or when the application requires isolation beyond the ISO1540 device rating.

How it compares

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Price $19.99
Cheaper than about 60% of the 5,998 comparable items (median $24.99).

Specifications

Product
Brand nameLORDWORLD

Questions about this item

Will the ISO1540 isolator work with my existing 5 V I²C sensors?

Yes, the module supports both 3.3 V and 5 V logic levels, so it can sit between a 5 V host and 3.3 V peripherals without level-shifting hardware.

How can I verify the isolator is passing data correctly after wiring it?

Run an I²C bus scan at up to 1 MHz; if the target device addresses appear on the controller side, the ISO1540 is forwarding transactions as intended.

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