component
AT28HC256-70SU
Public Made by Adomby adom
Microchip Tech Pre-ordered MCUs, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
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"type": "component",
"description": "Microchip Tech Pre-ordered MCUs, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"embedded processors & controllers",
"at28hc256-70su",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
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"README.md",
"at28hc256-70su.kicad_sym",
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"at28hc256-70su.step",
"at28hc256-70su.lbr",
"docs/hero.png",
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"component": {
"mpn": "AT28HC256-70SU",
"manufacturer": "Microchip Tech",
"package": "SOIC-28-300mil",
"pin_count": 28,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/69487d138f6dfa367cf13259c029e406.pdf",
"parts": {
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"footprint": "at28hc256-70su.kicad_mod",
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"model_3d_step": "at28hc256-70su-etched.step",
"model_3d_step_plain": "at28hc256-70su.step",
"lbr": "at28hc256-70su.lbr"
},
"distributor_links": {
"lcsc": "C609689",
"digikey": "AT28HC256-70SU-ND",
"mouser": "556-AT28HC256-70SU"
},
"distributor_check": {
"checked_at": "2026-10-30T20:32:04Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "AT28HC256-70SU-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-AT28HC256-70SU",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "A14",
"type": "input",
"description": "Address input A14."
},
{
"number": "2",
"name": "A12",
"type": "input",
"description": "Address input A12."
},
{
"number": "3",
"name": "A7",
"type": "input",
"description": "Address input A7."
},
{
"number": "4",
"name": "A6",
"type": "input",
"description": "Address input A6."
},
{
"number": "5",
"name": "A5",
"type": "input",
"description": "Address input A5."
},
{
"number": "6",
"name": "A4",
"type": "input",
"description": "Address input A4."
},
{
"number": "7",
"name": "A3",
"type": "input",
"description": "Address input A3."
},
{
"number": "8",
"name": "A2",
"type": "input",
"description": "Address input A2."
},
{
"number": "9",
"name": "A1",
"type": "input",
"description": "Address input A1."
},
{
"number": "10",
"name": "A0",
"type": "input",
"description": "Address input A0."
},
{
"number": "11",
"name": "I/O0",
"type": "bidirectional",
"description": "Data input/output bit 0."
},
{
"number": "12",
"name": "I/O1",
"type": "bidirectional",
"description": "Data input/output bit 1."
},
{
"number": "13",
"name": "I/O2",
"type": "bidirectional",
"description": "Data input/output bit 2."
},
{
"number": "14",
"name": "GND",
"type": "power_in",
"description": "Ground."
},
{
"number": "15",
"name": "I/O3",
"type": "bidirectional",
"description": "Data input/output bit 3."
},
{
"number": "16",
"name": "I/O4",
"type": "bidirectional",
"description": "Data input/output bit 4."
},
{
"number": "17",
"name": "I/O5",
"type": "bidirectional",
"description": "Data input/output bit 5."
},
{
"number": "18",
"name": "I/O6",
"type": "bidirectional",
"description": "Data input/output bit 6."
},
{
"number": "19",
"name": "I/O7",
"type": "bidirectional",
"description": "Data input/output bit 7; used for DATA Polling to detect end of write."
},
{
"number": "20",
"name": "CE",
"type": "input",
"description": "Chip Enable input; deselecting the device puts it in standby."
},
{
"number": "21",
"name": "A10",
"type": "input",
"description": "Address input A10."
},
{
"number": "22",
"name": "OE",
"type": "input",
"description": "Output Enable input."
},
{
"number": "23",
"name": "A11",
"type": "input",
"description": "Address input A11."
},
{
"number": "24",
"name": "A9",
"type": "input",
"description": "Address input A9."
},
{
"number": "25",
"name": "A8",
"type": "input",
"description": "Address input A8."
},
{
"number": "26",
"name": "A13",
"type": "input",
"description": "Address input A13."
},
{
"number": "27",
"name": "WE",
"type": "input",
"description": "Write Enable input."
},
{
"number": "28",
"name": "VCC",
"type": "power_in",
"description": "Device power supply, single 5V ± 10%."
}
],
"provenance": {
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"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: AT28HC256-70SU (no E/F option, 70 ns) is not listed in the ordering tables on pages 30-31, which onl"
],
"pages_sent": 14,
"cost_usd": 0.1002,
"at": "2026-10-30T20:31:54"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/69487d138f6dfa367cf13259c029e406.pdf",
"pages": 34,
"sha256": "9fbfb62b758b1eb8",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 28,
"described": 28,
"cites_pages": true,
"refuses_to_fabricate": true
}
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}