This part is a kind of semiconductor called ADM3485.

Function of this product has (ADM3483 - ADM3491) RS-485/RS-422 Transceivers.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

3.3 V Slew Rate Limited, Half- and Full-Duplex, RS-485/RS-422 Transceivers Data Sheet FEATURES Operate with 3.3 V supply Interoperable with 5 V logic EIA RS-422 and RS-485 compliant over full common-mode range Data rate options ADM3483/ADM3488: 250 kbps ADM3485/ADM3490/ADM3491: 10 Mbps Half- and full-duplex options Reduced slew rates for low EMI (ADM3483 and ADM3488) 2 nA supply current in shutdown mode (ADM3483/ADM3485/ADM3491) Up to 32 transceivers on the bus −7 V to +12 V bus common-mode range Specified over the –40°C to +85°C temperature range 8 ns skew (ADM3485/ADM3490/ADM3491) 8-lead SOIC and 14-lead SOIC (ADM3491 only) packages ADM3483/ADM3485/ADM3488/ADM3490/ADM3491 FUNCTIONAL BLOCK DIAGRAMS VCC ADM3483/ ADM3485 RO RE DE DI D R A B 05524-027 GND Figure 1. VCC A B RO R [ ... ]

ADM3485 PDF Datasheet Download