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4-channel I2C-safe Bi-directional Logic Level Converter - BSS138

SKU: ADA757

$6.95 AUD, inc GST
$6.32 AUD, exc GST

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4-channel I2C-safe Bi-directional Logic Level Converter - BSS138
6.95 AUD

SKU: ADA757

$6.95 AUD, inc GST
$6.32 AUD, exc GST
1 reviews 0 5 5
In stock, with a short lead time. 133 units dispatch in 4 to 8 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Wed, 27th of Dec with Express Post within Australia.
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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 they suggest checking those out if you need high-speed transfer.

While Adafruit 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

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Documentation and Resources:
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Product Comments


Customer Reviews

  1. Review by F verified purchaser
    Rating
    100

    Haven't used it yet, sorry. (Posted on 14/03/2017)

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
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Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

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