{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCA9554ADBR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TCA9554ADBR","canonicalUrl":"https://icboms.com/texas-instruments/TCA9554ADBR","factsUrl":"https://icboms.com/api/mcp/products/TCA9554ADBR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TCA9554ADBR, I²C/SMBus I/O expander, 8 I/O, push-pull output, POR, 400 kHz, 1.65V–5.5V, -40°C to 85°C, 16-SSOP.","salesMarkdown":"## I²C port expander for mixed-voltage buses It provides eight push-pull GPIOs controllable over a two-wire serial bus, with a power-on reset (POR) feature that forces all outputs to a known state at startup. ## 400 kHz bus and interrupt handling The I²C interface runs at 400 kHz (standard-mode), which is sufficient for polling eight GPIOs at sub-millisecond latency. If the bus is shared with high-speed peripherals like 1 MHz sensors, the 400 kHz ceiling becomes a scheduling constraint — budget the bus time accordingly. An interrupt output (active-low, open-drain) is available: any input change asserts INT, letting the host sleep until a button press or sensor edge wakes it. This is a practical power-saving feature for battery-powered edge nodes. ## Active lifecycle, no last-time-buy risk It is still in regular production through TI and its authorized distribution network. ROHS3 compliant. ## Package and footprint The 16-SSOP (0.209\", 5.30 mm width) is a fine-pitch but hand-solderable surface-mount package. The supplier device package is 16-SSOP.","metaTitle":"TI TCA9554ADBR I²C/SMBus I/O Expander, 8 GPIO, 400 kHz","metaDescription":"Texas Instruments TCA9554ADBR 8-bit I²C/SMBus I/O expander with POR, 1.65V–5.5V supply, 400 kHz clock, interrupt output, -40°C to 85°C. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"POR","Interface":"I²C, SMBus","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"8","Package / Case":"16-SSOP (0.209\\\", 5.30mm Width)","Clock Frequency":"400 kHz","lifecycle_stage":"eol_hot","Interrupt Output":"Yes","Voltage - Supply":"1.65V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"16-SSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.68","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.68000","currency":"USD"},{"qty":10,"price":"$1.50400","currency":"USD"},{"qty":25,"price":"$1.42760","currency":"USD"},{"qty":100,"price":"$1.17270","currency":"USD"},{"qty":250,"price":"$1.09620","currency":"USD"},{"qty":500,"price":"$0.96874","currency":"USD"},{"qty":2000,"price":"$0.72150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4d5596a2a800f4f8e6020276029f2340.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is TCA9554ADBR compatible with 3.3V logic?","answer":"The I²C pins are 5 V tolerant, so it can also sit on a mixed 3.3 V / 5 V bus without level shifting."},{"question":"Can TCA9554ADBR be used as a replacement for PCA9554AD?","answer":"The TCA9554ADBR is the TI direct replacement for the PCA9554AD. Both are 8-bit I²C GPIO expanders in 16-SSOP with the same pinout and register map. The TCA variant adds POR and operates down to 1.65 V (vs 2.3 V minimum for the PCA). Drop-in compatible in most designs."},{"question":"What is the difference between TCA9554ADBR and TCA9554DBR?","answer":"The TCA9554DBR is the same die in a 16-SOIC package (wider body, 7.5 mm width) versus the 16-SSOP (5.3 mm width) of the TCA9554ADBR. Electrical specs are identical. Choose based on board area and assembly preference."},{"question":"When sourcing TCA9554ADBR, what is the closest functional second-source?","answer":"It is not a pin-compatible replacement — it offers only four I/Os — but it shares the same I²C register protocol and can serve as a drop-in for designs needing fewer GPIOs. For an 8-pin-for-8-pin replacement, the PCA9554AD is the closest alternative."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TCA9554ADBR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TCA9554ADBR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}