Open collector converter, encoder line driver, push-pull encoder

 ST1480A Series 3.3 V 15 kV ESD Protected RS-485/RS-422 Transceiver - SOIC-8

https://www.futureelectronics.com/p/electromechanical--circuit-protection--protection-thyristors/bta16-800bwrg-stmicroelectronics-5686464