3.3V supply — not a drop-in for 5V RS-485 buses
This part is a low-voltage RS-422/RS-485 driver, not a 5V part. If your existing backplane or cable plant expects 5V differential swing, the AM26LV31EIRGYR will not meet the VOD minimum at the receiver. It is a correct choice for 3.3V-only systems — newer PLCs, 3.3V FPGA banks, or battery-powered remote I/O — where the bus voltage stays within the 3.6V absolute maximum.
Package and thermal: QFN layout notes
The 16-VFQFN with exposed pad measures 4x3.5 mm. This is a QFN — not an SOIC — so the stencil aperture for the center pad and the via pattern under it need to be in the layout notes from the start.
It can be designed into new builds without scheduling a last-time buy or qualification of a replacement.