component
AT24C256N
Public Made by Adomby adom
HGSEMI EEPROM, DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734
{
"schema_version": 1,
"type": "component",
"slug": "at24c256n",
"title": "AT24C256N",
"brief": "HGSEMI EEPROM, DIP-8. 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",
"memory",
"at24c256n",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "AT24C256N",
"manufacturer": "HGSEMI",
"package": "DIP-8",
"pin_count": 8,
"category": "Memory",
"subcategory": "EEPROM",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912606908461056",
"parts": {
"symbol": "at24c256n.kicad_sym",
"footprint": "at24c256n.kicad_mod",
"model_3d": "at24c256n-hero.glb",
"model_3d_plain": "at24c256n-etched.glb",
"model_3d_step": "at24c256n-etched.step",
"model_3d_step_plain": "at24c256n.step",
"lbr": "at24c256n.lbr"
},
"distributor_links": {
"lcsc": "C434602"
},
"distributor_check": {
"checked_at": "2026-10-19T05:15:09Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "A0",
"type": "input",
"description": "Device address input that is hardwired to VIH or VIL, and is read as VIL if left unconnected."
},
{
"number": "2",
"name": "A1",
"type": "input",
"description": "Device address input that is hardwired to VIH or VIL, and is read as VIL if left unconnected."
},
{
"number": "3",
"name": "A2",
"type": "input",
"description": "Device address input that is hardwired to VIH or VIL, and is read as VIL if left unconnected."
},
{
"number": "4",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "5",
"name": "SDA",
"type": "bidirectional",
"description": "Serial data line that is bi-directional with an open-drain output, so it can be wire-ORed and is typically pulled high by an external resistor."
},
{
"number": "6",
"name": "SCL",
"type": "input",
"description": "Serial clock input where the rising edge latches data into the EEPROM and the falling edge clocks data out."
},
{
"number": "7",
"name": "WP",
"type": "input",
"description": "Write protect input that blocks all programming when connected to VIH or VCC, allows programming when left unconnected or at VIL, and does not affect reads."
},
{
"number": "8",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage of 1.8V to 5.5V, with a decoupling capacitor of at least 10nF recommended."
}
],
"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+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet does not say which package the MPN AT24C256N ships in. DIP-8 is taken from the package; The datasheet lists NC (No-Connect) in its pin function table, but no pin on the 8-pin drawing is NC",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 11,
"cost_usd": 0.1751,
"at": "2026-10-19T05:12:40"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912606908461056",
"pages": 11,
"sha256": "d7220784e4d64aba",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 8,
"described": 8,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "at24c256n.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
7.874,
9.27,
6.98
],
"zmin_mm": -3.3,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",
"checked": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "at24c256n-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "body on z = 0, through-hole leads below",
"extents_mm": [
7.874,
9.27,
6.98
],
"zmin_mm": -3.3,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "200e21c25d33014da4c015d2f0ab4eeec3a9449101fb855df2bd011d8bdd6452",
"checked": "2026-10-19",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "HGSEMI",
"Package": "DIP-8",
"Category": "Memory",
"Pins": "8"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "d7220784e4d64abaa15738be07928410d0cc88961d3f48c5af2bbe77be74345d",
"rows": [
{
"name": "Clock frequency, SCL",
"symbol": "fSCL",
"kind": "timing",
"unit": "kHz",
"min": null,
"typ": null,
"max": 400,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Clock frequency, SCL",
"symbol": "fSCL",
"kind": "timing",
"unit": "kHz",
"min": null,
"typ": null,
"max": 1000,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Noise suppression time",
"symbol": "tI",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 100,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Noise suppression time",
"symbol": "tI",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 50,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Clock pulse width low",
"symbol": "tLOW",
"kind": "timing",
"unit": "µs",
"min": 1.3,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Clock pulse width low",
"symbol": "tLOW",
"kind": "timing",
"unit": "µs",
"min": 0.4,
"typ": null,
"max": null,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Clock pulse width high",
"symbol": "tHIGH",
"kind": "timing",
"unit": "µs",
"min": 0.6,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Clock pulse width high",
"symbol": "tHIGH",
"kind": "timing",
"unit": "µs",
"min": 0.4,
"typ": null,
"max": null,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Clock low to data out valid",
"symbol": "tAA",
"kind": "timing",
"unit": "µs",
"min": null,
"typ": null,
"max": 0.9,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Clock low to data out valid",
"symbol": "tAA",
"kind": "timing",
"unit": "µs",
"min": null,
"typ": null,
"max": 0.55,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Time the bus must be free before a new transmission can start",
"symbol": "tBUF",
"kind": "timing",
"unit": "µs",
"min": 1.3,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Time the bus must be free before a new transmission can start",
"symbol": "tBUF",
"kind": "timing",
"unit": "µs",
"min": 0.5,
"typ": null,
"max": null,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "START hold time",
"symbol": "tHD.STA",
"kind": "timing",
"unit": "µs",
"min": 0.6,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "START hold time",
"symbol": "tHD.STA",
"kind": "timing",
"unit": "µs",
"min": 0.25,
"typ": null,
"max": null,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "START set-up time",
"symbol": "tSU.STA",
"kind": "timing",
"unit": "µs",
"min": 0.6,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "START set-up time",
"symbol": "tSU.STA",
"kind": "timing",
"unit": "µs",
"min": 0.25,
"typ": null,
"max": null,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Data in hold time",
"symbol": "tHD.DAT",
"kind": "timing",
"unit": "µs",
"min": 0,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Data in set-up time",
"symbol": "tSU.DAT",
"kind": "timing",
"unit": "ns",
"min": 100,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Input rise time",
"symbol": "tR",
"kind": "timing",
"unit": "µs",
"min": null,
"typ": null,
"max": 0.3,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Input fall time",
"symbol": "tF",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 300,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Input fall time",
"symbol": "tF",
"kind": "timing",
"unit": "ns",
"min": null,
"typ": null,
"max": 100,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "STOP set-up time",
"symbol": "tSU.STO",
"kind": "timing",
"unit": "µs",
"min": 0.6,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "STOP set-up time",
"symbol": "tSU.STO",
"kind": "timing",
"unit": "µs",
"min": 0.25,
"typ": null,
"max": null,
"conditions": "VCC 2.5-5.0V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Data out hold time",
"symbol": "tDH",
"kind": "timing",
"unit": "ns",
"min": 50,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "VCC slew rate at power up",
"symbol": "tPWR,R",
"kind": "timing",
"unit": "V/ms",
"min": 0.1,
"typ": null,
"max": 50,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Time required after VCC is stable before the device can accept commands",
"symbol": "tPUP",
"kind": "timing",
"unit": "µs",
"min": 100,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Minimum time at VCC=0V between power cycles",
"symbol": "tPOFF",
"kind": "timing",
"unit": "ms",
"min": 500,
"typ": null,
"max": null,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Write cycle time",
"symbol": "tWR",
"kind": "timing",
"unit": "ms",
"min": null,
"typ": null,
"max": 5,
"conditions": "VCC 1.8V column",
"source_page": 9,
"source": "datasheet"
},
{
"name": "Endurance",
"symbol": "",
"kind": "electrical",
"unit": "write cycles",
"min": 1000000,
"typ": null,
"max": null,
"conditions": "25℃, Page Mode, 3.3V",
"source_page": 9,
"source": "datasheet"
},
{
"name": "24C256 supply",
"symbol": "VCC1",
"kind": "recommended_operating",
"unit": "V",
"min": 1.8,
"typ": null,
"max": 5.5,
"conditions": "",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Supply read current",
"symbol": "ICC1",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 0.4,
"max": 1,
"conditions": "VCC @ 5.0V SCL = 100 kHz",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Supply write current",
"symbol": "ICC2",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 2,
"max": 3,
"conditions": "VCC @ 5.0V SCL = 100 kHz",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Supply current",
"symbol": "ISB1",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 1,
"conditions": "VCC @ 1.8V, VIN = VCC or VSS",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Input leakage current",
"symbol": "IIL",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 3,
"conditions": "VIN = VCC or VSS",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Output leakage current",
"symbol": "ILO",
"kind": "electrical",
"unit": "µA",
"min": null,
"typ": null,
"max": 3,
"conditions": "VIN = VCC or VSS",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Input low level",
"symbol": "VIL",
"kind": "electrical",
"unit": "V",
"min": -0.6,
"typ": null,
"max": null,
"conditions": "",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Output low level",
"symbol": "VOL2",
"kind": "electrical",
"unit": "V",
"min": null,
"typ": null,
"max": 0.4,
"conditions": "VCC @ 3.0V, IOL = 2.1 mA",
"source_page": 10,
"source": "datasheet"
},
{
"name": "Industrial operating temperature",
"symbol": "",
"kind": "recommended_operating",
"unit": "℃",
"min": -40,
"typ": null,
"max": 85,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "℃",
"min": -50,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Maximum voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": null,
"typ": null,
"max": 8,
"conditions": "",
"source_page": 2,
"source": "datasheet"
},
{
"name": "Input voltage on any pin relative to ground",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": null,
"conditions": "relative to ground",
"source_page": 2,
"source": "datasheet"
},
{
"name": "ESD protection on all pins",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": 2000,
"typ": null,
"max": null,
"conditions": "all pins",
"source_page": 2,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"at24c256n"
],
"discovery_pitch": "AT24C256N (HGSEMI) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"at24c256n.kicad_sym",
"at24c256n.kicad_mod",
"at24c256n.glb",
"at24c256n.step",
"at24c256n.lbr",
"docs/hero.png",
"docs/at24c256n-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"at24c256n-hero.glb",
"at24c256n-hero.overlay.json",
"at24c256n-etched.glb"
],
"visibility": {
"public": true
}
}