Part identity and key parametrics
The Texas Instruments SN65HVD77DGK is a full-duplex RS-422/RS-485 transceiver in an 8-VSSOP package, designed for balanced differential data transmission at rates up to 50Mbps.
At 50Mbps, this transceiver supports high-speed RS-485 links for encoder feedback, motion-control networks, or backplane communication. The full-duplex architecture lets data flow in both directions simultaneously, doubling throughput on a four-wire bus compared to half-duplex designs that must arbitrate direction. The 70 mV of receiver hysteresis helps reject noise on long cable runs without external filtering.
3.3V supply rail and temperature range
Surface-mount assembly in the 8-VSSOP footprint keeps board area small.
For dual-sourcing assurance, the SN65HVD77D is a pin-compatible sibling in a different package (8-SOIC) — same electrical specification, same data rate, same supply range.