The DS3486M is a quad RS422/RS423 line receiver from Texas Instruments. It takes four differential bus signals and converts them to single-ended TTL/CMOS-compatible logic levels. This is a pure receiver — no driver on board — so it is meant for the receive side of a point-to-point or multi-drop RS422/RS423 link. Typical applications include data acquisition front-ends, industrial control interfaces, and serial communication ports where the bus is driven by a separate RS422 transmitter.
The DS3486M comes in a 16-SOIC package with a body width of 3.90 mm (0.154"). It is a surface-mount part, so it reflows on a standard SOIC-16 footprint. The bulk packaging means it ships in tubes or trays, not tape-and-reel, which matters if your pick-and-place line expects reels.