THVD4421RHBR from Texas Instruments is an active full, half-duplex transceiver for RS-232, RS-422, RS-485 serial interfaces. It integrates 2/2 driver/receiver channels, supports data rates up to 1Mbps, 20Mbps, and operates from 3V ~ 5.5V.
Selection profile: The listed duplex mode is Full, Half; confirm bus topology and direction-control requirements in the datasheet. This is a multiprotocol device covering RS-232, RS-422, RS-485, so mode selection and pin configuration should be confirmed for the intended interface. The 1Mbps, 20Mbps data-rate rating, 3V ~ 5.5V supply range, and -40°C ~ 125°C (TA) operating range distinguish this orderable part in the catalog.
Package and ordering: THVD4421RHBR is supplied in 32-VQFN (5×5); the source package designation is 32-VQFN (5×5), with Tape & Reel (TR) Cut Tape (CT) Digi-Reel® packaging options listed for this orderable part. Confirm reel, tube, tray, or cut-tape requirements against the full manufacturer ordering code before purchase.
Use the linked datasheet to verify pinout, protection features, timing limits, termination requirements, and application-specific conditions. Availability, lead time, and order quantity require RFQ confirmation.

