{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS3618-50DGKRG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS3618-50DGKRG4","canonicalUrl":"https://icboms.com/texas-instruments/TPS3618-50DGKRG4","factsUrl":"https://icboms.com/api/mcp/products/TPS3618-50DGKRG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS3618-50DGKRG4 battery backup circuit, active-low reset, push-pull output, 4.55V threshold, 60ms minimum reset timeout, -40°C to 85°C, 8-VSSOP package.","salesMarkdown":"## Battery backup supervisor for 5V rails The Texas Instruments TPS3618-50DGKRG4 is a battery backup circuit that monitors a single 5V supply rail with a 4.55V threshold. When the monitored voltage drops below that threshold, it asserts an active-low reset output—push-pull, totem pole style—and holds it for a minimum of 60ms after the supply recovers. This gives downstream processors and logic time to stabilize before the reset releases. ## What the 4.55V threshold means for your 5V system The 4.55V threshold is set for a nominal 5V supply—it trips before the rail falls below the minimum operating voltage of most 5V logic and MCUs. If your system runs at 3.3V or uses a 5V rail that dips below 4.55V during normal operation (e.g., heavily loaded or long cable runs), this part will trigger nuisance resets. The 60ms minimum reset timeout gives a typical processor enough time to complete its power-on reset sequence, but check your processor's required reset pulse width against the datasheet's min/max specs. The 8-VSSOP package (3.00mm width) is a small surface-mount footprint that fits on tight PCB layouts, but the 0.65mm pitch demands careful soldering profile control. No official successor part is listed on the TI product page. For new designs, look at TI's current-generation supervisor family (e.g., TPS3808 or TPS382x series) with similar threshold and reset options—but verify pin compatibility and timeout specs against your board.","metaTitle":"TI TPS3618-50DGKRG4 Battery Backup Circuit, 4.55V Threshold","metaDescription":"Texas Instruments TPS3618-50DGKRG4 battery backup supervisor IC with active-low reset, push-pull output, 60ms timeout, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"Texas Instruments","Type":"Battery Backup Circuit","Reset":"Active Low","Output":"Push-Pull, Totem Pole","Series":"-","Package":"Tape & Reel (TR)","Mounting Type":"Surface Mount","Reset Timeout":"60ms Minimum","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Base Product Number":"TPS3618","Voltage - Threshold":"4.55V","Operating Temperature":"-40°C~85°C(TJ)","Supplier Device Package":"8-VSSOP","Number of Voltages Monitored":"1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e3decd1f486ab57fcf7b6eb4e05508c4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TPS3618-50DGKRG4/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for TPS3618-50DGKRG4?","answer":"No official replacement part number is listed by Texas Instruments for the TPS3618-50DGKRG4. For a new design, consider TI's current supervisor family such as the TPS3808 or TPS382x series, which offer similar reset thresholds and push-pull outputs. Verify pinout, threshold voltage, and reset timeout against your application before substituting."},{"question":"Is TPS3618-50DGKRG4 compatible with 5V systems?","answer":"Yes, the 4.55V threshold is designed for monitoring a 5V supply rail. It asserts reset when the rail drops below 4.55V, which is appropriate for 5V logic and microcontroller systems. It is not intended for 3.3V or lower-voltage rails."},{"question":"Does TPS3618-50DGKRG4 have a push-pull output?","answer":"Yes, the reset output is push-pull, totem pole. This means it can both source and sink current without requiring an external pull-up resistor, simplifying the connection to the processor reset pin."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS3618-50DGKRG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS3618-50DGKRG4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}