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ISO1540 Bidirectional I2C Isolator

SKU 40004903

If you need to keep two devices connected together using an I2C data bus, but they need to be electrically isolated - then this ISO1540 Bidirectional I2C Isolator from PMD Way is for you. 

This board uses the Texas Instruments ISO1540 IC, which is fully bi-directional, supports up to 1 MHz clock rates, supports clock-stretching, works with 3 to 5V DC power or logic and offers 2500 V-RMS isolation.

Note that you need to power both sides of the board. Board includes inline header pins as shown, and free delivery. 

You can also connect devices using the popular STEMMA/QIIC/Piicodev cabling system. Click here to order some cables as well. 

More information:

Texas Instruments ISO1450 data page


Isolation rating: Basic
Number of channels: 2
Serial data: Bidirectional
Serial clock: Bidirectional
Data rate (max): 1 (Mbps)
Working isolation voltage (VIOWM): 400 (Vrms)
Surge isolation voltage (VIOSM) 4000 (VPK)
Transient isolation voltage (VIOTM) 4242 (VPK)
Withstand isolation voltage (VISO) 2500 (Vrms)
CMTI (min): 25 (kV/µs)
Supply voltage (max) 5.5 (V)
Supply voltage (min): 3 (V)

Don't forget to check out our full range of breakout boards if this doesn't meet your needs. And as always, all orders receive free delivery. 

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