{"title":"SparkFun Logic Level Converter - Bi-Directional","handle":"sparkfun-logic-level-converter-bi-directional","url":"/products/sparkfun-logic-level-converter-bi-directional","description":"The SparkFun Bi-Directional Logic Level Converter safely translates signals between different voltage levels — stepping 5V down to 3.3V and 3.3V up to 5V on the same channel. It also works with 2.8V and 1.8V devices, making it a versatile bridge between mixed-voltage systems.\n\nEach board provides 4 bi-directional channels with clearly labelled high-side and low-side pins. Simply connect your high voltage to HV, low voltage to LV, and a common ground — signals are shifted automatically in both directions.\n\nKey Features\n\n\nBi-Directional – Steps up and steps down on the same channel simultaneously\n\n4 Channels – Convert 4 signals at once (2 inputs + 2 outputs per side)\n\nFlexible Voltage – Works with 1.8V, 2.8V, 3.3V, and 5V logic levels\n\nBSS138 MOSFETs – Reliable, proven level-shifting circuit\n\nCompact – 16.05 × 13.33 mm (0.63\" × 0.52\")\n\n\nIdeal For\n\nConnecting 3.3V sensors to 5V Arduino boards\nInterfacing Raspberry Pi (3.3V) with 5V peripherals\nI²C and SPI bus level shifting\nAny project mixing different logic voltage levels\n\n\nPackage Contents\n\n1× SparkFun Bi-Directional Logic Level Converter\n\n\nResources\n\nHookup Guide\nSchematic (PDF)\nBSS138 Datasheet (PDF)\nGitHub – Design Files\n","vendor":"SparkFun","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":10749,"title":"Default Title","sku":"SF-BOB-12009","price":8.0,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":901,"option1":"Default Title"}],"documents":[{"title":"BSS138 Datasheet","type":"datasheet","type_label":"Datasheet","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDRQUBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--478efb779bfa4ebb010f6f15395ea4066c161e04/BSS138.pdf","link":false,"file_extension":"PDF","file_size":123979,"description":"Datasheet for the BSS138 MOSFET used on the logic level converter board"},{"title":"Logic Level Converter Schematic","type":"schematic","type_label":"Schematic","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDRgUBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--93f91219d3741affb16be55907b1691ea82e8466/Logic_Level_Bidirectional.pdf","link":false,"file_extension":"PDF","file_size":43901,"description":"Circuit schematic for the SparkFun bi-directional logic level converter"},{"title":"Logic Level Converter Eagle Files","type":"schematic","type_label":"Schematic","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDRwUBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--0c095b1541992c7156ddc12f618ae54565440c96/Logic_Level_Bidirectional.zip","link":false,"file_extension":"ZIP","file_size":60569,"description":"Eagle design files including schematic and PCB layout for the board"},{"title":"Supplier page — sparkfun.com","type":"supplier_description","type_label":"Supplier Description","url":"https://littlebirdelectronics.com.au/rails/active_storage/blobs/redirect/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVGkDBxoBSSIIcHVyBjsAVEkiDGJsb2JfaWQGOwBG--8960d0cad8df0e816a4eeb293c07391dcd4624ce/sparkfun-logic-level-converter-bi-directional-sparkfun-com-2026-05-13.pdf","link":false,"file_extension":"PDF","file_size":686221,"description":"Snapshot of https://www.sparkfun.com/sparkfun-logic-level-converter-bi-directional.html (captured 13 May 2026)"}]}