Level converter lets you use 5V hardware with 3.3V ARM chips

I’ve got a fair amount of equipment on hand for prototyping 5V projects. The problem is that I’m working mostly with ARM chips these days and that stuff is just sitting around gathering dust. I recently hit Mouser and started looking for what’s available when it comes to level converters. Most of them are either one-way, or have a pin that needs to be toggled to switch direction. But I found one chip that is bi-directional and sounds fantastic. TI makes the TXB0108. It’s got eight channels, one side of the chip works with 1.2V to 3.6V, the other side works with 1.65V to 5.5V. This is perfect, and will even let me prototype with some of those 1.2V EEPROM chips I bought by accident. Join me after the break to see the breakout boards I made and a quick test of the hardware.

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