3.3V 5V TXS0108E 8 CHANNEL LOGIC LEVEL CONVERTER CONVERT TTL BIDIRECTIONAL MUTUAL CONVERT

Sepcifications

VCCA connects to 3.3V power supply     
VCCB connects to 5V power supply      
GND connects to power negative pole respectively, the two power supply should be common-grounded with each other     
When Ax has TTL 3.3V input, Bx will get TTL 5V output     
When Bx has TTL 5V input, Ax will get TTL 3.3V output     
NO direction control required