20 Mbps half-duplex RS485 — what that 80 mV hysteresis buys you
The Texas Instruments SN65HVD75DGKR is a half-duplex RS485/RS422 transceiver in an 8-VSSOP package, rated for 20 Mbps on the bus and 80 mV of receiver hysteresis. That hysteresis figure is the key to noise immunity on long or electrically noisy cable runs — it prevents the receiver from chattering when the differential bus voltage hovers near zero during idle or weak-driver conditions. With a single driver and single receiver (1/1), this part is sized for point-to-point or small multi-drop links where one node talks at a time.
Supply range and temperature — where the part lives
If your board lives in a climate-controlled rack, you have margin; if it sits near a motor drive or exhaust manifold, the 125°C ceiling is the spec that keeps the link alive.
Package and footprint — 8-VSSOP
The 8-VSSOP package (3.00 mm width) is a space-saving surface-mount footprint, compatible with standard 8-pin MSOP/TSSOP land patterns.