Adafruit 4-channel I2C-safe Bi-directional Logic Level Converter - BSS138
Adafruit 4-channel I2C-safe Bi-directional Logic Level Converter - BSS138 is backordered and will ship as soon as it is back in stock.
Delivery and Shipping
Delivery and Shipping
Delivery Options
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- AusPost Parcel Standard: $9. Tracked delivery in 2-6 business days.
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- Pickup: $0. Email us to arrange a pickup from our location in Huntingdale 3166 in Melbourne at support@zaitronics.com.au. More details can be found in our contact page.
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- Note: Orders containing backordered item will delay delivery until all items are available
Warranty & Refund Policy
Warranty & Refund Policy
Warranty & Refund Policy
- Standard Warranty: 12 months for all products. Low-cost hobby parts have a 90-day warranty unless safe handling is shown.
- Exceptions: Kits and interfaceable electronics may not be covered if damaged due to misuse.
- Returns: Contact support via your order confirmation email within 14 days of purchase. Items must be unopened and in original packaging. Proof of purchase is required.
- Defective/Damaged Items: Notify us within 30 days for a free refund or replacement. Exclusions apply.
- Return Shipping Costs: Paid by the customer unless the item is defective. Shipping costs are non-refundable.
Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flashcards, 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. Here we've got a 4-channel I2C-safe Bi-directional Logic Level Converter that has open-drain-with-10K-pullups outputs, great for logic level conversion of interfaces.
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-speed transfer. Also not good for driving loads from the high side, this is logic level conversion only.
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 a 6-pin header you can solder on to plug into a breadboard or perfboard.