Need a quick solution for level shifting to protect 3.3V device from 5V? Check out TXB0104 Bi-Directional Level Shifter – designed around TXB0104 bi-directional level shifter. This little board performs bidirectional level shifting from mostly any voltage to any voltage and also auto-detect the direction.
Ideal to drop on a breadboard between two logic chips for quick prototyping. It will save you from going through the hassle of soldering very fine pitch chip package, also 0.1uF capacitor added onto both sides with 10K pull up resistor on the output enable pin.
Buy TXB0104 Bi-Directional Level Shifter from Pakronics: