4-Channel I2C-safe Bi-Directional Logic Level Converter

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Product Code: 91489
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Product Description
  • Adafruit level shifter
  • 4x BSS138 FETs with 10K pullups
  • 1.8V on the low side, up to 10V on the high side
  • Supports I2C interface
  • Works great with SPI interface
$7.00
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4-Channel I2C-safe Bi-Directional Logic Level Converter info

Since Arduino and Arduino like systems 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.

There are some other handy level shifters, from the DIP 74LVC245 to the fancy bi-directional TXB0108. However, neither of these work well with I2C, which uses a funky pull-up system to transfer data back and forth. 4-Channel I2C-safe Bi-Directional Logic Level Converter combines the ease-of-use of the bi-directional TXB0108 with an I2C-compatible FET design following NXP's app note.

4-Channel I2C-safe Bi-Directional Logic Level Converter 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 it is suggested to check them out if you need high-speed transfer.

While 4-Channel I2C-safe Bi-Directional Logic Level Converter is designed for use with I2C, it works great for SPI, TTL Serial, and any other digital interface both uni-directional and bidirectional.

 

4-Channel I2C-safe Bi-Directional Logic Level Converter - General Specifications

  • Adafruit level shifter
  • 4x BSS138 FETs with 10K pullups
  • 1.8V on the low side, up to 10V on the high side
  • Supports I2C interface
  • Works great with SPI interface

 

Documents

BSS138 Datasheet

 

References

Adafruit Web Sitehttps://www.adafruit.com/product/757

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