BQ40Z80RSMT

{
  "schema_version": 1,
  "type": "component",
  "slug": "bq40z80rsmt",
  "title": "BQ40Z80RSMT",
  "brief": "Texas Instruments Battery Management ICs, VQFN-32(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "power management",
    "bq40z80rsmt",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BQ40Z80RSMT",
    "manufacturer": "Texas Instruments",
    "package": "VQFN-32(4x4)",
    "pin_count": 33,
    "category": "Power Management",
    "subcategory": "Battery Management ICs",
    "datasheet": "https://www.ti.com/cn/lit/gpn/bq40z80",
    "parts": {
      "symbol": "bq40z80rsmt.kicad_sym",
      "footprint": "bq40z80rsmt.kicad_mod",
      "model_3d": "bq40z80rsmt-hero.glb",
      "model_3d_plain": "bq40z80rsmt-etched.glb",
      "model_3d_step": "bq40z80rsmt-etched.step",
      "model_3d_step_plain": "bq40z80rsmt.step",
      "lbr": "bq40z80rsmt.lbr"
    },
    "distributor_links": {
      "lcsc": "C528626",
      "digikey": "296-BQ40Z80RSMTTR-ND",
      "mouser": "595-BQ40Z80RSMT"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T15:54:21Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-BQ40Z80RSMTTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-BQ40Z80RSMT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VC5",
        "type": "input",
        "description": "Cell-voltage sense input for the fifth cell from the bottom that supplies balancing current for that cell and returns balancing current for the sixth cell; connect through a 100 Ω series resistor and 0.1 µF capacitor to the fifth cell's positive terminal and to VC4 (tie to VC4 if unused), with a VC5-VC4 input range of -0.2 V to 5 V."
      },
      {
        "number": "2",
        "name": "VC4",
        "type": "input",
        "description": "Cell-voltage sense input for the fourth cell from the bottom that supplies balancing current for that cell and returns balancing current for the fifth cell; connect through a 100 Ω series resistor and 0.1 µF capacitor to the fourth cell's positive terminal and to VC3 (tie to VC3 if unused), with a VC4-VC3 input range of -0.2 V to 5 V."
      },
      {
        "number": "3",
        "name": "VC3",
        "type": "input",
        "description": "Cell-voltage sense input for the third cell from the bottom that supplies balancing current for that cell and returns balancing current for the fourth cell; connect through a 100 Ω series resistor and 0.1 µF capacitor to the third cell's positive terminal and to VC2 (tie to VC2 if unused), with a VC3-VC2 input range of -0.2 V to 5 V."
      },
      {
        "number": "4",
        "name": "VC2",
        "type": "input",
        "description": "Cell-voltage sense input for the second cell from the bottom that supplies balancing current for that cell and returns balancing current for the third cell; connect through a 100 Ω series resistor and 0.1 µF capacitor to the second cell's positive terminal and to VC1 (tie to VC1 if unused), with a VC2-VC1 input range of -0.2 V to 5 V."
      },
      {
        "number": "5",
        "name": "VC1",
        "type": "input",
        "description": "Cell-voltage sense input for the bottom cell that supplies balancing current for that cell and returns balancing current for the second cell; connect through a 100 Ω series resistor and 0.1 µF capacitor to the bottom cell's positive terminal and to VSS, with a VC1-VSS input range of -0.2 V to 5 V."
      },
      {
        "number": "6",
        "name": "SRN",
        "type": "input",
        "description": "Analog input to the internal coulomb counter that senses the small voltage between SRP and SRN, with charge current flowing from SRP to SRN; connect through an RC filter to the sense-resistor terminal tied to PACK- (not CELL-), with an SRP/SRN input range of -0.2 V to 0.2 V."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "8",
        "name": "SRP",
        "type": "input",
        "description": "Analog input to the internal coulomb counter that senses the small voltage between SRP and SRN, where SRP is the top of the sense resistor; connect through an RC filter to the sense-resistor terminal tied to the minimum positive cell negative terminal, with an SRP/SRN input range of -0.2 V to 0.2 V."
      },
      {
        "number": "9",
        "name": "VSS",
        "type": "power_in",
        "description": "Device ground."
      },
      {
        "number": "10",
        "name": "TS1",
        "type": "input",
        "description": "Temperature sensor 1 thermistor input connected to thermistor-1; if unused, connect directly to VSS and configure the data flash accordingly."
      },
      {
        "number": "11",
        "name": "TS2",
        "type": "input",
        "description": "Temperature sensor 2 thermistor input connected to thermistor-2; if unused, connect directly to VSS and configure the data flash accordingly."
      },
      {
        "number": "12",
        "name": "TS3/ADCIN1/GPIO",
        "type": "bidirectional",
        "description": "Multifunction pin configurable through control registers as TS3 thermistor-3 input, ADCIN1 general-purpose ADC input for a properly scaled signal, or customizable GPIO; if unused, connect directly to VSS and configure the data flash accordingly."
      },
      {
        "number": "13",
        "name": "DISP/TS4/ADCIN2/GPIO",
        "type": "bidirectional",
        "description": "Multifunction pin configurable through control registers as display button or LED connection (DISP), TS4 thermistor-4 input, ADCIN2 general-purpose ADC input for a properly scaled signal, or customizable GPIO; if unused, connect directly to VSS and configure the data flash accordingly."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "15",
        "name": "DISP/GPIO",
        "type": "bidirectional",
        "description": "Open-drain multifunction pin for a display button or LED connection (DISP) or customizable GPIO, configurable through control registers; if unused, connect directly to VSS and configure the data flash accordingly."
      },
      {
        "number": "16",
        "name": "PDSG/GPIO",
        "type": "bidirectional",
        "description": "Open-drain multifunction pin that drives an N-channel FET to control PRE-DISCHARGE mode (PDSG) or serves as customizable GPIO, configurable through control registers; if unused, connect directly to VSS and configure the data flash accordingly."
      },
      {
        "number": "17",
        "name": "PRES/SHUTDN/DISP/PDSG/GPIO",
        "type": "bidirectional",
        "description": "Open-drain multifunction pin serving as system-present input (PRES, connected to the host to detect a removable pack; do not pull up), embedded-pack emergency shutdown input (SHUTDN), display button or LED control (DISP), pre-discharge control (PDSG), or GPIO; if unused, connect directly to VSS and configure the data flash accordingly."
      },
      {
        "number": "18",
        "name": "SMBD",
        "type": "bidirectional",
        "description": "Open-drain SMBus data pin with a recommended input voltage range up to 32 V."
      },
      {
        "number": "19",
        "name": "SMBC",
        "type": "bidirectional",
        "description": "Open-drain SMBus clock pin with a recommended input voltage range up to 32 V."
      },
      {
        "number": "20",
        "name": "LEDCNTLA/PDSG/GPIO",
        "type": "output",
        "description": "Multifunction pin for LED display segment LEDCNTLA (drives external LEDs per firmware configuration), pre-discharge PDSG control, or customizable GPIO, with a constant-current sink of 22.5 mA typical (15.75 mA to 29.25 mA); if unused, connect VSS through a 20 kΩ resistor."
      },
      {
        "number": "21",
        "name": "LEDCNTLB/GPIO",
        "type": "output",
        "description": "Multifunction pin for LED display segment LEDCNTLB (drives external LEDs per firmware configuration) or customizable GPIO, with a constant-current sink of 22.5 mA typical (15.75 mA to 29.25 mA); if unused, connect VSS through a 20 kΩ resistor."
      },
      {
        "number": "22",
        "name": "LEDCNTLC/GPIO",
        "type": "output",
        "description": "Multifunction pin for LED display segment LEDCNTLC (drives external LEDs per firmware configuration) or customizable GPIO, with a constant-current sink of 22.5 mA typical (15.75 mA to 29.25 mA); if unused, connect VSS through a 20 kΩ resistor."
      },
      {
        "number": "23",
        "name": "FUSE",
        "type": "output",
        "description": "Fuse-driver output that can be ORed with a secondary protector in the fuse N-channel FET gate driver and releases a typical 8 V output when the device commands the chemical fuse to ignite; if unused, connect directly to VSS."
      },
      {
        "number": "24",
        "name": "VCC",
        "type": "power_in",
        "description": "Auxiliary power input connected through a series resistor to the midpoint of the protection FETs, with an operating supply range of 2.2 V to 32 V."
      },
      {
        "number": "25",
        "name": "PACK",
        "type": "input",
        "description": "Battery-pack detection analog input connected to PACK+ through a series resistor, with a PACK-VSS input range of -0.2 V to 32 V."
      },
      {
        "number": "26",
        "name": "DSG",
        "type": "output",
        "description": "NMOS discharge FET drive output connected to the gate of the DSG FET."
      },
      {
        "number": "27",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "28",
        "name": "PCHG",
        "type": "output",
        "description": "PMOS precharge FET drive output connected to the PCHG FET gate when precharge is used; leave floating if unused."
      },
      {
        "number": "29",
        "name": "CHG",
        "type": "output",
        "description": "NMOS charge FET drive output connected to the gate of the CHG FET."
      },
      {
        "number": "30",
        "name": "BAT",
        "type": "power_in",
        "description": "Main power input connected through a diode and series resistor to the top of the battery pack, with an operating input range of 2.2 V to 32 V."
      },
      {
        "number": "31",
        "name": "PBI",
        "type": "power_in",
        "description": "Power-backup input that supplies power during brief transient power interruptions; connect a 2.2 µF capacitor from PBI to VSS, with an operating range of 2.2 V to 32 V."
      },
      {
        "number": "32",
        "name": "VC6",
        "type": "input",
        "description": "Cell-voltage sense input for the sixth cell from the bottom that supplies balancing current for that cell; connect through a 100 Ω series resistor and 0.1 µF capacitor to the sixth cell's positive terminal and to VC5 (tie to VC5 if unused), with a VC6-VSS input range of -0.2 V to 30 V."
      },
      {
        "number": "33",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet's Figure 4-1 shows an exposed thermal pad on the VQFN package, but the text gives no p; Analog-input pins (marked AI in Table 4-1) were mapped to KiCad type 'input' because KiCad has no an; The pin 17 description is condensed from several multifunction roles. The datasheet's exact wording ",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 31,
        "cost_usd": 0.1954,
        "at": "2026-10-30T15:53:41"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/bq40z80",
        "pages": 49,
        "sha256": "91afbd94ad765fcf",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "bq40z80rsmt.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4,
          0.6
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "7b482a511cdf2cf875c31931f9fea7f745b8dac2ea6203531cd6604f40a290cb",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bq40z80rsmt-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4,
          4,
          0.6
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "41f7b77ccdd97a65ff0a74cb83c8963863e346690709eb727fe5cedc61ce9fa2",
        "checked": "2026-10-30",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "RSM0032A",
      "source_page": 46,
      "D": {
        "nom_mm": 4,
        "range_mm": [
          3.9,
          4.1
        ]
      },
      "E1": {
        "nom_mm": 4,
        "range_mm": [
          3.9,
          4.1
        ]
      },
      "e": {
        "nom_mm": 0.4,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1,
        "range_mm": [
          null,
          1
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "bq40z80rsmt.step",
        "verdict": "PASS",
        "reasons": [
          "height within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "VQFN-32(4x4)",
      "Category": "Power Management",
      "Pins": "33"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "91afbd94ad765fcf02d9671a4b767d84e3efa0e816469851a7e7ee6d612ce2b0",
      "rows": [
        {
          "name": "Supply voltage VCC (BAT, VCC, PBI, PACK pins)",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.2,
          "typ": null,
          "max": 32,
          "conditions": "BAT, VCC, PBI, PACK pins; min/max over TA = -40 to 85 °C",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Shutdown voltage (falling)",
          "symbol": "VSHUTDOWN–",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.8,
          "typ": 2,
          "max": 2.2,
          "conditions": "VPACK < VSHUTDOWN–",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Shutdown start voltage (rising)",
          "symbol": "VSHUTDOWN+",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.05,
          "typ": 2.25,
          "max": 2.45,
          "conditions": "VPACK > VSHUTDOWN– + VHYS",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Analog input voltage range SRP, SRN",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": -0.2,
          "typ": null,
          "max": 0.2,
          "conditions": "SRP, SRN pins",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Operating temperature",
          "symbol": "TOPR",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "BAT to VCC switchover voltage (falling)",
          "symbol": "VSWITCHOVER–",
          "kind": "electrical",
          "unit": "V",
          "min": 1.95,
          "typ": 2.1,
          "max": 2.2,
          "conditions": "VBAT < VSWITCHOVER–",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "VCC to BAT switchover voltage (rising)",
          "symbol": "VSWITCHOVER+",
          "kind": "electrical",
          "unit": "V",
          "min": 2.9,
          "typ": 3.1,
          "max": 3.25,
          "conditions": "VBAT > VSWITCHOVER– + VHYS",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Internal pull-down resistance PACK",
          "symbol": "RPD",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 30,
          "typ": 40,
          "max": 50,
          "conditions": "PACK",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "AFE power-on reset time",
          "symbol": "tRST",
          "kind": "timing",
          "unit": "µs",
          "min": 200,
          "typ": 300,
          "max": 400,
          "conditions": "",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Internal 1.8 V LDO regulator voltage",
          "symbol": "VREG",
          "kind": "electrical",
          "unit": "V",
          "min": 1.6,
          "typ": 1.8,
          "max": 2,
          "conditions": "",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Regulator output voltage variation over temperature",
          "symbol": "ΔVO(TEMP)",
          "kind": "tolerance",
          "unit": "%",
          "min": -0.25,
          "typ": null,
          "max": 0.25,
          "conditions": "ΔVREG / ΔTA, IREG = 10mA",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Regulator line regulation",
          "symbol": "ΔVO(LINE)",
          "kind": "electrical",
          "unit": "%",
          "min": -0.6,
          "typ": null,
          "max": 0.5,
          "conditions": "ΔVREG / ΔVBAT, IBAT = 10mA",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Regulator load regulation",
          "symbol": "ΔVO(LOAD)",
          "kind": "electrical",
          "unit": "%",
          "min": -1.5,
          "typ": null,
          "max": 1.5,
          "conditions": "ΔVREG / ΔIREG, IREG = 0 mA to 10 mA",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Regulator short-circuit current limit",
          "symbol": "ISC",
          "kind": "electrical",
          "unit": "mA",
          "min": 25,
          "typ": 40,
          "max": 55,
          "conditions": "VREG = 0 × VREG(NOM)",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Internal voltage reference 1",
          "symbol": "VREF1",
          "kind": "electrical",
          "unit": "V",
          "min": 1.215,
          "typ": 1.22,
          "max": 1.225,
          "conditions": "TA = 25°C, trimmed",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "VREF1 drift",
          "symbol": "VREF1(DRIFT)",
          "kind": "temperature_coefficient",
          "unit": "PPM/°C",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "TA = 0°C to 60°C, trimmed",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "VREF1 drift",
          "symbol": "VREF1(DRIFT)",
          "kind": "temperature_coefficient",
          "unit": "PPM/°C",
          "min": -80,
          "typ": null,
          "max": 80,
          "conditions": "TA = -40°C to 85°C, trimmed",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Internal voltage reference 2",
          "symbol": "VREF2",
          "kind": "electrical",
          "unit": "V",
          "min": 1.22,
          "typ": 1.225,
          "max": 1.23,
          "conditions": "TA = 25°C, trimmed",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "VREF2 drift",
          "symbol": "VREF2(DRIFT)",
          "kind": "temperature_coefficient",
          "unit": "PPM/°C",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "TA = 0°C to 60°C, trimmed",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "VREF2 drift",
          "symbol": "VREF2(DRIFT)",
          "kind": "temperature_coefficient",
          "unit": "PPM/°C",
          "min": -80,
          "typ": null,
          "max": 80,
          "conditions": "TA = -40°C to 85°C, trimmed",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Scale factor K, VC1–VSS through VC5–VC4",
          "symbol": "K",
          "kind": "electrical",
          "unit": "-",
          "min": 0.198,
          "typ": 0.2,
          "max": 0.202,
          "conditions": "VC1–VSS, VC2–VC1, VC3–VC2, VC4–VC3, VC5–VC4, VC6–VC5",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Scale factor K, VC6–VSS",
          "symbol": "K",
          "kind": "electrical",
          "unit": "-",
          "min": 0.032,
          "typ": 0.0333,
          "max": 0.034,
          "conditions": "VC6–VSS",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Scale factor K, BAT and PACK",
          "symbol": "K",
          "kind": "electrical",
          "unit": "-",
          "min": 0.0275,
          "typ": 0.0286,
          "max": 0.0295,
          "conditions": "BAT–VSS, PACK–VSS",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Scale factor K, VREF2",
          "symbol": "K",
          "kind": "electrical",
          "unit": "-",
          "min": 0.49,
          "typ": 0.5,
          "max": 0.51,
          "conditions": "VREF2",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "ADC input voltage range (cell and VC inputs)",
          "symbol": "VIN",
          "kind": "electrical",
          "unit": "V",
          "min": -0.2,
          "typ": null,
          "max": 5,
          "conditions": "VC1–VSS, VC2–VC1, VC3–VC2, VC4–VC3, VC5–VC4, VC6–VC5",
          "source_page": 11,
          "source": "datasheet"
        },
        {
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