Interface

Viewed products

Manufacturers

4-channel I2C-safe Bi-directional Logic Level Converter

AF-757

Adafruit Industries

$5.11 tax incl.

In Stock

6 Items In Stock

This breakout has 4 BSS138 FETs with 10K pullups. It works down to 1.8V on the low side, and up to 10V on the high side. 

More details

Add to wishlist

Shipping Rates

Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flash cards and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V. 

We do have some other handy level shifters in the shop, from the DIP 74LVC245 to the fancy bi-directional TXB0108. However, neither of these are happy to work with I2C, which uses a funky pull-up system to transfer data back and forth. This level shifter board combines the ease-of-use of the bi-directional TXB0108 with an I2C-compatible FET design following NXP's app note. 

This breakout has 4 BSS138 FETs with 10K pullups. It works down to 1.8V on the low side, and up to 10V on the high side. The 10K's do make the interface a little more sluggish than using a TXB0108 or 74LVC245 so we suggest checking those out if you need high-speedtransfer. 

While we designed it for use with I2C, this works great for SPI, TTL Serial, and any other digital interface both uni-directional and bidirectional. Comes with a fully assembled, and tested PCB with 4 full bidirectional converter lines as well as 2 pieces of 6-pin header you can solder on to plug into a breadboard or perfboard.

Downloads:

BSS138 Datasheet 
The newer NXP app note explaining how it works (the older Philips version of the app note is also worth a read)

The newer NXP app note explaining how it works (the older Philips version of the app note is also worth a read)

Write a review

4-channel I2C-safe Bi-directional Logic Level Converter

4-channel I2C-safe Bi-directional Logic Level Converter

This breakout has 4 BSS138 FETs with 10K pullups. It works down to 1.8V on the low side, and up to 10V on the high side.