{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS2781E+T&R","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS2781ETR","canonicalUrl":"https://icboms.com/analog-devices/DS2781ETR","factsUrl":"https://icboms.com/api/mcp/products/DS2781E%2BT%26R","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS2781E+T&R, Battery Monitor, 1-Wire Interface, 1 ~ 2 Cells, Lithium Ion/Polymer, 8-TSSOP (0.173\", 4.40mm Width), Surface Mount, -20°C ~ 70°C.","salesMarkdown":"## What this battery monitor does and where it fits The Maxim Integrated DS2781E+T&R is a battery monitor IC designed for 1 to 2 series-connected Lithium Ion or Lithium Polymer cells. It communicates over a 1-Wire interface, which keeps the BOM simple — a single data line plus ground to the host microcontroller. The device is packaged in an 8-TSSOP (4.40 mm width) for surface-mount assembly and is rated for the -20°C to 70°C ambient temperature range, covering most portable consumer and industrial battery-pack applications. ## Cell count and chemistry — fit for a 2S pack The DS2781E+T&R supports 1 or 2 cells in series. That means it can monitor a single-cell Li-Ion pouch or a 2S (two-series) pack, which is the common configuration for higher-voltage portable tools, medical devices, and backup battery units. The chemistry is specified for Lithium Ion and Lithium Polymer, so it handles the standard 3.6 V / 3.7 V nominal chemistries. If your design uses a different chemistry (LiFePO4, NiMH, lead-acid), this part is not the right fit. ## 1-Wire interface — what it means for the system The 1-Wire interface is a single-pin serial bus that carries both data and power (parasitic or external supply). For the DS2781E+T&R, this means the host microcontroller only needs one GPIO pin and a pull-up resistor to read voltage, current, temperature, and accumulated charge data. It simplifies isolation if the battery pack is on a separate ground reference, and it reduces connector pin count. The trade-off is bus speed — 1-Wire tops out around 15-16 kbps in overdrive mode, which is fine for periodic monitoring but not for streaming data. ## Package and assembly The DS2781E+T&R comes in an 8-TSSOP package (4.40 mm body width, 0.65 mm pitch). It is a surface-mount part, so standard reflow soldering applies. The tape-and-reel option (TR suffix) is the production-friendly format for pick-and-place. The package is small enough for space-constrained battery-pack PCBs but still hand-solderable with care. ## Lifecycle and compliance The DS2781E+T&R is listed as Active in production. It is also ROHS3 compliant, so it meets the current EU restriction requirements.","metaTitle":"DS2781E+T&R Battery Monitor, 1-Wire, 1-2 Cells, 8-TSSOP","metaDescription":"Maxim DS2781E+T&R battery monitor IC for 1-2 Li-Ion/Polymer cells. 1-Wire interface, 8-TSSOP package. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Battery Monitor","Interface":"1-Wire","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP (0.173\\\", 4.40mm Width)","Number of Cells":"1 ~ 2","lifecycle_stage":"eol_hot","Battery Chemistry":"Lithium Ion/Polymer","Operating Temperature":"-20°C ~ 70°C (TA)","Supplier Device Package":"8-TSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.68","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.68000","currency":"USD"},{"qty":10,"price":"$7.83900","currency":"USD"},{"qty":25,"price":"$7.47440","currency":"USD"},{"qty":100,"price":"$6.49010","currency":"USD"},{"qty":250,"price":"$6.19836","currency":"USD"},{"qty":500,"price":"$5.65146","currency":"USD"},{"qty":1000,"price":"$4.92224","currency":"USD"},{"qty":2500,"price":"$4.73993","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9e38c8e8b4862b5ca55325565adcfc86.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How many cells can DS2781E+T&R support?","answer":"DS2781E+T&R supports 1 or 2 series-connected Lithium Ion or Lithium Polymer cells."},{"question":"Is DS2781E+T&R RoHS compliant?","answer":"Yes, DS2781E+T&R is ROHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS2781ETR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS2781ETR 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}}