2PCS 8-Channel IIC UART SPI TTL Logic Level Converter 5V/3.3V Bi-Directional

Ax input 3.3V TTL level,Bx will output 5V TTL level. Ax input 5V TTL level,Bx will output 3.3V TTL level. Instructions:( for example 3.3V, 5V system conversion). Conversion level range: 1.8V-6V. However, it may delay due to industrial strike action, severe weather, custom reasons or peak seasons.

eBay