Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Auto-sensing voltage level shifters

I need to connect some 5V logic to FPGA devices that are not 5V tolerant. I checked different possibilites and found those "newer" auto-sensing dual-rail transcievers. Somebody have any experie...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Be carefull with these, they don't look like ordanary buffers.

1. check the logic levels, its not TTL

2. they can not drive a lot of current (in the sense of a normal bus driver that does 20 - 40 mAmps). Look to the description of the working principle and schematic diagram at the end of the datasheet.

Stefaan