component
BU91797MUF-ME2
Public Made by Adomby adom
ROHM Semicon LCD Drivers, VQFN-48-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "bu91797muf-me2",
"version": "0.1.0",
"type": "component",
"description": "ROHM Semicon LCD Drivers, VQFN-48-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"nixie tube driver-led driver",
"bu91797muf-me2",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"bu91797muf-me2.kicad_sym",
"bu91797muf-me2.kicad_mod",
"bu91797muf-me2.glb",
"bu91797muf-me2.step",
"bu91797muf-me2.lbr",
"docs/hero.png",
"docs/bu91797muf-me2-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"bu91797muf-me2-hero.glb",
"bu91797muf-me2-hero.overlay.json",
"bu91797muf-me2-etched.glb"
],
"component": {
"mpn": "BU91797MUF-ME2",
"manufacturer": "ROHM Semicon",
"package": "VQFN-48-EP(7x7)",
"pin_count": 49,
"category": "Nixie Tube Driver/LED Driver",
"subcategory": "LCD Drivers",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/4c79e92806c3a25f6599f1b75f2df9e5.pdf",
"parts": {
"symbol": "bu91797muf-me2.kicad_sym",
"footprint": "bu91797muf-me2.kicad_mod",
"model_3d": "bu91797muf-me2-hero.glb",
"model_3d_plain": "bu91797muf-me2-etched.glb",
"model_3d_step": "bu91797muf-me2-etched.step",
"model_3d_step_plain": "bu91797muf-me2.step",
"lbr": "bu91797muf-me2.lbr"
},
"distributor_links": {
"lcsc": "C2653715",
"digikey": "BU91797MUF-ME2TR-ND",
"mouser": "755-BU91797MUF-ME2"
},
"distributor_check": {
"checked_at": "2026-10-27T01:28:47Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "BU91797MUF-ME2TR-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "755-BU91797MUF-ME2",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "SEG1",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "2",
"name": "SEG2",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "3",
"name": "SEG3",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "4",
"name": "SEG4",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "5",
"name": "SEG5",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "6",
"name": "SEG6",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "7",
"name": "SEG7",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "8",
"name": "SEG8",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "9",
"name": "SEG9",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "10",
"name": "SEG10",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "11",
"name": "SEG11",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "12",
"name": "SEG12",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "13",
"name": "SEG13",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "14",
"name": "SEG14",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "15",
"name": "SEG15",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "16",
"name": "SEG16",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "17",
"name": "SEG17",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "18",
"name": "SEG18",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "19",
"name": "SEG19",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "20",
"name": "SEG20",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "21",
"name": "SEG21",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "22",
"name": "SEG22",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "23",
"name": "SEG23",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "24",
"name": "SEG24",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "25",
"name": "SEG25",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "26",
"name": "SEG26",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "27",
"name": "SEG27",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "28",
"name": "SEG28",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "29",
"name": "SEG29",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "30",
"name": "SEG30",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "31",
"name": "SEG31",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "32",
"name": "SEG32",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "33",
"name": "SEG33",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "34",
"name": "SEG34",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "35",
"name": "SEG35",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "36",
"name": "COM0",
"type": "output",
"description": "Common output for LCD driving; leave open when unused."
},
{
"number": "37",
"name": "COM1",
"type": "output",
"description": "Common output for LCD driving; leave open when unused."
},
{
"number": "38",
"name": "COM2",
"type": "output",
"description": "Common output for LCD driving; leave open when unused."
},
{
"number": "39",
"name": "COM3",
"type": "output",
"description": "Common output for LCD driving; leave open when unused."
},
{
"number": "40",
"name": "VLCD",
"type": "power_in",
"description": "Power supply for LCD driving, 0V to VDD-2.4V (VDD-VLCD must be at least 2.4V)."
},
{
"number": "41",
"name": "VDD",
"type": "power_in",
"description": "Power supply, 2.5V to 6.0V (absolute maximum 7.0V); place a capacitor above 0.1µF between VDD and VSS."
},
{
"number": "42",
"name": "VSS",
"type": "power_in",
"description": "Ground."
},
{
"number": "43",
"name": "TEST1",
"type": "input",
"description": "Test input for ROHM use only; must be connected to VSS."
},
{
"number": "44",
"name": "OSCIN",
"type": "input",
"description": "External clock input, selectable against the internal clock by command; must be connected to VSS when using the internal oscillator."
},
{
"number": "45",
"name": "SCL",
"type": "input",
"description": "Serial clock terminal of the 2-wire serial interface."
},
{
"number": "46",
"name": "SDA",
"type": "bidirectional",
"description": "Serial data in-out terminal of the 2-wire serial interface, with VOL of 0.4V max at 3mA load."
},
{
"number": "47",
"name": "TEST2",
"type": "input",
"description": "POR enable setting: VDD disables POR (software reset then required), VSS enables POR; connect to VSS when unused."
},
{
"number": "48",
"name": "SEG0",
"type": "output",
"description": "Segment output for LCD driving; leave open when unused."
},
{
"number": "49",
"name": "EXT-PAD",
"type": "passive",
"description": "Exposed substrate pad on the bottom of the package for heat radiation; contact it to the board and supply VSS level or leave open."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-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 gives no pin number for the exposed pad. I assigned '49' by convention. It is typed pa; The pin table lists 'SEG0 to SEG35' at '1 to 35, 48'. I mapped SEG0 to pin 48 and SEGn to pin n for ",
"7/49 pins cited to the wrong page (name found elsewhere): ['26:SEG26@p2', '29:SEG29@p2', '31:SEG31@p2', '32:SEG32@p2']"
],
"pages_sent": 10,
"cost_usd": 0.133,
"at": "2026-10-27T01:28:21"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/4c79e92806c3a25f6599f1b75f2df9e5.pdf",
"pages": 30,
"sha256": "e7404bbda6983c5c",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 49,
"described": 49,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "bu91797muf-me2.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7.0,
7.0,
0.77
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "f2b38b0b4bf967c77e683e8d4599608b9f0503055ec535b93c4ebb5d0163e916",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "bu91797muf-me2-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7.0,
7.0,
0.77
],
"zmin_mm": 0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "f801a4caef1eb1cf82868d42229d40b4b0f18e777477cba5620950e0de5ff948",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}