{"product_id":"adafruit-iso1540-bidirectional-i2c-isolator-stemma-qt-qwiic","title":"Adafruit ISO1540 Bidirectional I2C Isolator (STEMMA QT \/ Qwiic)","description":"\u003cp\u003eSometimes you'll find yourself with an I2C bus controller on one side, and an I2C bus device on the other and you gotta keep em (electrically) separated. Maybe because one is Earth-grounded, maybe because you've got some funky power monitoring setup, maybe you want to reduce noise.\u003c\/p\u003e\u003cp\u003eWhatever it is, you can use the\u003cstrong\u003e Adafruit ISO1540 Bidirectional I2C Isolator\u003c\/strong\u003e to add full electrical isolation between two sides of an I2C bus. The chip we use, the TI ISO1540 is fully bi-directional, supports up to 1 MHz clock rates, supports clock-stretching, works with 3 to 5V DC power or logic (separate on either side of course), with 2500 V-RMS isolation\u003c\/p\u003e\u003cp\u003eUsage is easy - you get power\/ground\/clock\/data breakout pads for each side as well as a matching STEMMA QT connector. \u003cstrong\u003eUnlike our other QT boards, the two sides are obviously electrically isolated, which means each half must be powered! \u003c\/strong\u003eCheck that the green LED is lit on both sides. Now send data over I2C and you're good to go. We have 10K pullups on each side, from the I2C pins to the matching VCC for that side.\u003c\/p\u003e\u003cp\u003eFor more details about chip specifications, check out the TI product page.\u003c\/p\u003e\u003cp\u003eTo get you going fast, we spun up a custom made PCB in the \u003cstrong\u003eSTEMMA QT\u003c\/strong\u003e form factor, making it easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the ISO1540 or to chain it with a wide range of other sensors and accessories using a \u003cstrong\u003ecompatible cable\u003c\/strong\u003e. \u003cstrong\u003eQT Cable is not included\u003c\/strong\u003e, but we have a variety in the shop. \u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch2\u003eTechnical Details\u003c\/h2\u003e\u003cdiv id=\"tab-technical-details-content\" class=\"panel-collapse collapse in\"\u003e \u003cdiv class=\"row\"\u003e \u003cdiv class=\"col-lg-12 col-md-12 col-sm-12 col-xs-12\"\u003e\n\u003cp\u003e\u003cstrong\u003eISO1540 Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIsolated bidirectional, I2C compatible, communication\u003c\/li\u003e\n\u003cli\u003eSupports up to 1-MHz operation\u003c\/li\u003e\n\u003cli\u003e3-V to 5.5-V supply range\u003c\/li\u003e\n\u003cli\u003eOpen-drain outputs With 3.5-mA Side 1 and 35-mA Side 2 sink current capability\u003c\/li\u003e\n\u003cli\u003e-40°C to +125°C operating temperature\u003c\/li\u003e\n\u003cli\u003e±50-kV\/μs transient immunity (Typical)\u003c\/li\u003e\n\u003cli\u003eHBM ESD protection of 4 kV on all pins; 8 kV on bus pins\u003c\/li\u003e\n\u003cli\u003eSafety-related certifications:\u003cul\u003e\n\u003cli\u003e4242-VPK isolation per DIN VDE V 0884-11:2017-01\u003c\/li\u003e\n\u003cli\u003e2500-VRMS isolation for 1 minute per UL 1577\u003c\/li\u003e\n\u003cli\u003eCSA approval per IEC 60950-1 and IEC 62368-1 end equipment standards\u003c\/li\u003e\n\u003cli\u003eCQC basic insulation per GB4943.1-2011\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e \u003c\/div\u003e\n\u003cul id=\"product-files\"\u003e \u003c\/ul\u003e \u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"col-lg-2 col-md-3 col-sm-3 col-xs-4\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"col-lg-2 col-md-3 col-sm-3 col-xs-4\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e \u003c\/div\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":43493248434253,"sku":"eux1787258096163","price":6.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/1182\/8301\/files\/adafruit-iso1540-bidirectional-i2c-isolator-stemma-qt-qwiic_1.jpg?v=1787258100","url":"https:\/\/www.grandorchard.shop\/products\/adafruit-iso1540-bidirectional-i2c-isolator-stemma-qt-qwiic","provider":"My Store","version":"1.0","type":"link"}