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SN65HVD72: Inconsistent signals

6576753
Prodigy 10 points

Part Number: SN65HVD72

Hi,

I have a pair of SN65HVD72s connected together. They are powered with 3.3v and connected over some short twisted jumpers on a breadboard. Includes a termination resistor of 100ohm. When I first connected them, the data got through just fine. Then, without touching anything, I started getting CRC errors. On my oscilloscope, the differential signals look quite odd and inconsistent. I have tried with various additional pullups on the DI pins and bias resistors on the A and B lines. This whole setup was working well with an ISL32603 before. Any ideas?

s o .