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4-channel-level-shifter-pcb's Introduction

Adafruit 4 Channel Level Shifter PCB


Click here to purchase one from the Adafruit shop

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-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.

These are the Eagle CAD files for the Adafruit BSS138-based 4 channel level shifter

License

Adafruit invests time and resources providing this open source design, please support Adafruit and open-source hardware by purchasing products from Adafruit!

All text above must be included in any redistribution

Designed by Limor Fried/Ladyada for Adafruit Industries. Creative Commons Attribution/Share-Alike, all text above must be included in any redistribution. See license.txt for additional information.

4-channel-level-shifter-pcb's People

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4-channel-level-shifter-pcb's Issues

SCH doesn't open on EagleCAD (or online SCH viewers)

I tried opening the BRD file in EagleCAD and it worked fine, but clicking to SCH annotation it fails with this error:

EAGLE update report

Date: 10/16/20 12:27 PM
File: /Users/ptorelli/proj/git/4-Channel-Level-Shifter-PCB/Adafruit FET 4-Channel Shifter.sch

An error occurred while parsing the intermediate XML file.
The XML file has been loaded into a text editor window as
/Users/ptorelli/proj/git/4-Channel-Level-Shifter-PCB/Adafruit FET 4-Channel Shifter.rpt.sch

Error:

line 65, column 34: Unexpected ''.

Online viewers also fail to read the SCH (like schematics.io).

Also, the BRD file is text and the SCH is binary, seems odd. Even weirder, it did load in EagleCAD -once- and I have a screenshot, but now it will no longer open.

Error while importing .sch file to KiCAD

Hi guys,

as I'd like to use your very helpful layout on a bigger RPi PCB, I wanted to import your design into my schematic. Unfortunately I'm getting an error that the .sch file could not be read.
Is there a way to get a correctly readable file or one especially for KiCAD?

Thanks for your support!

Best regards
Stefan

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