Logic Level Converter TXS01018E

Connects 5V and 3.3V devices safely across eight channels, automatically handling direction so you do not have to configure which way each line runs. This is what stands between a 5V Arduino and a 3.3V module such as an ESP8266, SD card or many I2C sensors — connect them directly and you will eventually destroy the 3.3V part. Faster than simple MOSFET-based converters, so it handles SPI at speed as well as I2C and UART. Eight channels with automatic direction sensing; Fast enough for SPI, not just I2C and UART; Prevents damage to 3.3V modules from 5V logic; Single board replaces eight discrete converters