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-speed transfer.

While we designed it for use with I2C, this works as well for TTL Serial, slow

<2MHz SPI, 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.

TECHNICAL DETAILS

•

BSS138 Datasheet

•

EagleCAD PCB files on GitHub

•

Fritzing library

The newer NXP app note explaining how it works (the older Philips version of the

app note is also worth a read)

https://www.adafruit.com/product/757/6-3-19