TM1621D

{
  "schema_version": 1,
  "type": "component",
  "slug": "tm1621d",
  "title": "TM1621D",
  "brief": "TM Shenzhen Titan Micro Elec LCD Drivers, QSOP-24. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "led drivers",
    "tm1621d"
  ],
  "component": {
    "mpn": "TM1621D",
    "manufacturer": "TM Shenzhen Titan Micro Elec",
    "package": "QSOP-24",
    "pin_count": 24,
    "category": "LED Drivers",
    "subcategory": "LCD Drivers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590902627935080448",
    "parts": {
      "symbol": "tm1621d.kicad_sym",
      "footprint": "tm1621d.kicad_mod",
      "model_3d": "tm1621d-etched.glb",
      "model_3d_plain": "tm1621d.glb",
      "model_3d_step": "tm1621d-etched.step",
      "model_3d_step_plain": "tm1621d.step",
      "lbr": "tm1621d.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "SEG17",
        "type": "output",
        "description": "LCD segment output SEG17. Drives one LCD segment line with the multi-level bias waveform (V0/V1/V2/V3)."
      },
      {
        "number": "2",
        "name": "SEG16",
        "type": "output",
        "description": "LCD segment output SEG16."
      },
      {
        "number": "3",
        "name": "SEG15",
        "type": "output",
        "description": "LCD segment output SEG15."
      },
      {
        "number": "4",
        "name": "SEG14",
        "type": "output",
        "description": "LCD segment output SEG14."
      },
      {
        "number": "5",
        "name": "SEG13",
        "type": "output",
        "description": "LCD segment output SEG13."
      },
      {
        "number": "6",
        "name": "SEG12",
        "type": "output",
        "description": "LCD segment output SEG12."
      },
      {
        "number": "7",
        "name": "SEG11",
        "type": "output",
        "description": "LCD segment output SEG11."
      },
      {
        "number": "8",
        "name": "SEG10",
        "type": "output",
        "description": "LCD segment output SEG10."
      },
      {
        "number": "9",
        "name": "SEG9",
        "type": "output",
        "description": "LCD segment output SEG9. Only SEG9-SEG22 outputs are physically available (RAM row 0-8 is not routed to pads)."
      },
      {
        "number": "10",
        "name": "/CS",
        "type": "input",
        "description": "Active-low chip select input for the serial interface (needs an external pull-up resistor, RPH ≈ 40-150 kΩ). When /CS is high the serial interface is reset and any data/commands are ignored; a low level enables writes into TM1621D."
      },
      {
        "number": "11",
        "name": "/WR",
        "type": "input",
        "description": "Serial write-clock input (needs an external pull-up resistor). On the rising edge of /WR the level on DATA is latched into TM1621D. fCLK max 300 kHz @ 3 V, 500 kHz @ 5 V."
      },
      {
        "number": "12",
        "name": "DATA",
        "type": "bidirectional",
        "description": "Serial data input/output for command and RAM data transfer (external pull-up required). Address, command and data bits are shifted in on /WR rising edges; also used as an output during read operations (tDD ≤ 2 µs @ 3 V, 1 µs @ 5 V)."
      },
      {
        "number": "13",
        "name": "VSS",
        "type": "power_in",
        "description": "Negative supply / ground reference (0 V)."
      },
      {
        "number": "14",
        "name": "VLCD",
        "type": "power_in",
        "description": "LCD driver supply input. Sets the LCD bias reference (V3 rail); must satisfy VLCD < VDD. Typical use: VDD=5 V, VLCD=4 V through a ~15 kΩ potentiometer (VR) for contrast trim."
      },
      {
        "number": "15",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive logic supply, 2.4 V to 5.2 V. IDD ≈ 150-300 µA (3 V, internal RC osc, no load)."
      },
      {
        "number": "16",
        "name": "COM0",
        "type": "output",
        "description": "LCD common (backplane) output COM0. Multiplexed drive with 2/3/4 commons selectable by BIAS&COM command."
      },
      {
        "number": "17",
        "name": "COM1",
        "type": "output",
        "description": "LCD common (backplane) output COM1."
      },
      {
        "number": "18",
        "name": "COM2",
        "type": "output",
        "description": "LCD common (backplane) output COM2 (only active in 3- or 4-COM modes)."
      },
      {
        "number": "19",
        "name": "COM3",
        "type": "output",
        "description": "LCD common (backplane) output COM3 (only active in 4-COM mode)."
      },
      {
        "number": "20",
        "name": "SEG22",
        "type": "output",
        "description": "LCD segment output SEG22."
      },
      {
        "number": "21",
        "name": "SEG21",
        "type": "output",
        "description": "LCD segment output SEG21."
      },
      {
        "number": "22",
        "name": "SEG20",
        "type": "output",
        "description": "LCD segment output SEG20."
      },
      {
        "number": "23",
        "name": "SEG19",
        "type": "output",
        "description": "LCD segment output SEG19."
      },
      {
        "number": "24",
        "name": "SEG18",
        "type": "output",
        "description": "LCD segment output SEG18."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590902627935080448",
        "pages": 9,
        "sha256": "cf34f4d92c95fd42",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "tm1621d.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.65,
          1.72
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d2244e3f2eff53b6985f22b8c8a44bb319a1973a6a440b2597d6d67813b09338",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "tm1621d-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          8.65,
          1.72
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7d23798bd7ed70de151623228d469e4fc796c084f6faf23e0f95c0aa952e74aa",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "TM Shenzhen Titan Micro Elec",
      "Package": "QSOP-24",
      "Category": "LED Drivers",
      "Pins": "24"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "tm1621d"
  ],
  "discovery_pitch": "TM1621D (TM Shenzhen Titan Micro Elec) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "tm1621d.kicad_sym",
    "tm1621d.kicad_mod",
    "tm1621d.glb",
    "tm1621d.step",
    "tm1621d.lbr",
    "docs/hero.png",
    "docs/tm1621d-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T10:55:40.218Z"
}