{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX3222IDW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"MAX3222IDW","canonicalUrl":"https://icboms.com/texas-instruments/MAX3222IDW","factsUrl":"https://icboms.com/api/mcp/products/MAX3222IDW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments MAX3222IDW RS-232 transceiver, full duplex, 2/2 drivers/receivers, 250 kbps data rate, 3V to 5.5V supply, -40°C to 85°C, 20-SOIC package.","salesMarkdown":"## RS-232 link at 250 kbps — what the data rate buys you The MAX3222IDW is a full-duplex RS-232 transceiver from Texas Instruments that handles 250 kbps on each of its two driver/receiver channels. That data rate covers the vast majority of legacy UART links — 115.2 kbps, 230.4 kbps, and the common 250 kbps industrial baud rates — without needing a faster (and pricier) transceiver. The 2/2 driver/receiver count means you get two independent transmit and two receive paths, enough for a dual serial port or one full-duplex link with hardware flow control (RTS/CTS). Supply range spans 3V to 5.5V, so the same part works in a 3.3V microcontroller design or a legacy 5V backplane. No separate level translator is needed between the UART and the RS-232 bus — the transceiver handles the voltage translation internally. ## Receiver hysteresis — noise margin on the bus The receiver hysteresis is specified at 300 mV. That means the input threshold has 300 mV of built-in deadband between the falling and rising edges, which rejects noise on long RS-232 cable runs. In a noisy industrial environment — motor drives switching nearby, long unshielded cable — that hysteresis keeps the receiver from chattering on coupled transients. It's a spec that matters more for the layout and cable quality than for the baud rate. ## Sourcing this part for a production BOM For a production BOM, the key procurement check is the package — 20-SOIC wide (7.50 mm width) — and the temperature grade.","metaTitle":"MAX3222IDW RS-232 Transceiver, 250 kbps, 2/2 Driver/Receiver","metaDescription":"MAX3222IDW RS-232 transceiver from Texas Instruments. Full-duplex, 2/2 driver/receiver, 250 kbps data rate, 3V to 5.5V supply, -40°C to 85°C, 20-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Interface & Transceivers"],"specifications":{"Mfr":"Texas Instruments","Type":"Transceiver","Duplex":"Full","Series":"-","Package":"Tube","Protocol":"RS232","Data Rate":"250kbps","Mounting Type":"Surface Mount","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Base Product Number":"MAX3222","Receiver Hysteresis":"300 mV","Operating Temperature":"-40°C~85°C","Supplier Device Package":"20-SOIC","Number of Drivers/Receivers":"2/2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.8300","priceTiers":[{"qty":1,"price":"$2.83000","currency":"USD"},{"qty":10,"price":"$2.54200","currency":"USD"},{"qty":25,"price":"$2.39840","currency":"USD"},{"qty":100,"price":"$2.04330","currency":"USD"},{"qty":250,"price":"$1.91860","currency":"USD"},{"qty":500,"price":"$1.67878","currency":"USD"},{"qty":1000,"price":"$1.39098","currency":"USD"},{"qty":2500,"price":"$1.35750","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2dd0c720be57623e93e05eecf9ce44ce.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/MAX3222IDW/alternatives.json"},"ai":{"faq":[{"question":"Is MAX3222IDW compatible with 3.3V logic?","answer":"Yes. The MAX3222IDW operates from a 3V to 5.5V supply, so it works directly with 3.3V UARTs. The RS-232 bus side still swings the ±5V to ±15V levels required by the RS-232 standard, but the logic interface to the microcontroller is at the supply voltage — 3.3V in this case. No external level shifter is needed."},{"question":"What is the difference between MAX3222IDW and MAX3222EIDW?","answer":"The MAX3222EIDW is the enhanced-ESD variant of the same base transceiver. The 'E' suffix parts typically add ±15 kV ESD protection on the RS-232 bus pins (IEC 61000-4-2 air-gap), compared to the standard ±15 kV HBM on the MAX3222IDW. The core specifications — 250 kbps data rate, 2/2 driver/receiver count, 3V to 5.5V supply, 20-SOIC package — are identical. If your cable interface is exposed to the outside of the enclosure (panel-mount DB9, for example), the EIDW variant gives extra ESD margin without changing the footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/MAX3222IDW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/MAX3222IDW when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}