component
AT28BV256-20SU
Public Made by Adomby adom
Microchip Tech Pre-ordered Chips, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "at28bv256-20su",
"version": "0.1.0",
"type": "component",
"description": "Microchip Tech Pre-ordered Chips, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"interface ics",
"at28bv256-20su",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
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"path": "docs/hero.png"
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"files": [
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"README.md",
"at28bv256-20su.kicad_sym",
"at28bv256-20su.kicad_mod",
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"at28bv256-20su.step",
"at28bv256-20su.lbr",
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"component": {
"mpn": "AT28BV256-20SU",
"manufacturer": "Microchip Tech",
"package": "SOIC-28-300mil",
"pin_count": 28,
"category": "Interface ICs",
"subcategory": "Pre-ordered Chips",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0c8445a498a8e601eaa112f522d37f6e.pdf",
"parts": {
"symbol": "at28bv256-20su.kicad_sym",
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"lbr": "at28bv256-20su.lbr"
},
"distributor_links": {
"lcsc": "C1348826",
"digikey": "AT28BV256-20SU-ND",
"mouser": "556-AT28BV25620SU"
},
"distributor_check": {
"checked_at": "2026-10-30T18:24:47Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "AT28BV256-20SU-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "556-AT28BV25620SU",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "A14",
"type": "input",
"description": "Address input A14; with A6-A13 it selects the 64-byte page during a page write, and all bytes in a page write must share the same A6-A14 state."
},
{
"number": "2",
"name": "A12",
"type": "input",
"description": "Address input A12; part of the A6-A14 page address that must remain constant during a page write."
},
{
"number": "3",
"name": "A7",
"type": "input",
"description": "Address input A7; part of the A6-A14 page address that must remain constant during a page write."
},
{
"number": "4",
"name": "A6",
"type": "input",
"description": "Address input A6; the lowest page-address bit, which must remain constant during a page write."
},
{
"number": "5",
"name": "A5",
"type": "input",
"description": "Address input A5; one of the A0-A5 inputs that select which byte within the 64-byte page is written."
},
{
"number": "6",
"name": "A4",
"type": "input",
"description": "Address input A4; selects the byte within the 64-byte page during a page write."
},
{
"number": "7",
"name": "A3",
"type": "input",
"description": "Address input A3; selects the byte within the 64-byte page during a page write."
},
{
"number": "8",
"name": "A2",
"type": "input",
"description": "Address input A2; selects the byte within the 64-byte page during a page write."
},
{
"number": "9",
"name": "A1",
"type": "input",
"description": "Address input A1; selects the byte within the 64-byte page during a page write."
},
{
"number": "10",
"name": "A0",
"type": "input",
"description": "Address input A0; selects the byte within the 64-byte page during a page write."
},
{
"number": "11",
"name": "I/O0",
"type": "bidirectional",
"description": "Data input/output bit 0; outputs go to high impedance when CE or OE is high."
},
{
"number": "12",
"name": "I/O1",
"type": "bidirectional",
"description": "Data input/output bit 1; outputs go to high impedance when CE or OE is high."
},
{
"number": "13",
"name": "I/O2",
"type": "bidirectional",
"description": "Data input/output bit 2; outputs go to high impedance when CE or OE is high."
},
{
"number": "14",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device; all input and output voltages are specified with respect to ground (-0.6V to VCC + 0.6V on outputs)."
},
{
"number": "15",
"name": "I/O3",
"type": "bidirectional",
"description": "Data input/output bit 3; outputs go to high impedance when CE or OE is high."
},
{
"number": "16",
"name": "I/O4",
"type": "bidirectional",
"description": "Data input/output bit 4; outputs go to high impedance when CE or OE is high."
},
{
"number": "17",
"name": "I/O5",
"type": "bidirectional",
"description": "Data input/output bit 5; outputs go to high impedance when CE or OE is high."
},
{
"number": "18",
"name": "I/O6",
"type": "bidirectional",
"description": "Data input/output bit 6; toggles during a write cycle when read as the toggle bit, and stops toggling when the write completes."
},
{
"number": "19",
"name": "I/O7",
"type": "bidirectional",
"description": "Data input/output bit 7; presents the complement of the last written data during Data Polling to indicate the end of a write cycle."
},
{
"number": "20",
"name": "CE",
"type": "input",
"description": "Chip enable (active low); CE low with OE low and WE high reads the array, and a high level deselects the device and inhibits writes; pulses shorter than 15 ns (typical) on CE are filtered."
},
{
"number": "21",
"name": "A10",
"type": "input",
"description": "Address input A10; part of the A6-A14 page address that must remain constant during a page write."
},
{
"number": "22",
"name": "OE",
"type": "input",
"description": "Output enable (active low); with CE low and WE high it enables the outputs, and OE and A9 are rated from -0.6V to +13.5V with respect to ground."
},
{
"number": "23",
"name": "A11",
"type": "input",
"description": "Address input A11; part of the A6-A14 page address that must remain constant during a page write."
},
{
"number": "24",
"name": "A9",
"type": "input",
"description": "Address input A9; rated from -0.6V to +13.5V, and raised to 12V ±0.5V to access the 64-byte device identification block at 7FC0H-7FFFH."
},
{
"number": "25",
"name": "A8",
"type": "input",
"description": "Address input A8; part of the A6-A14 page address that must remain constant during a page write."
},
{
"number": "26",
"name": "A13",
"type": "input",
"description": "Address input A13; part of the A6-A14 page address that must remain constant during a page write."
},
{
"number": "27",
"name": "WE",
"type": "input",
"description": "Write enable (active low); a low pulse on WE with CE low and OE high initiates a write cycle, and WE high inhibits writes."
},
{
"number": "28",
"name": "VCC",
"type": "power_in",
"description": "Device supply voltage; 2.7V to 3.6V for the AT28BV256-20 operating range."
}
],
"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 28S (SOIC) pin-to-number mapping was derived from the text extraction of the page 2 SOIC drawing; The page 2 text also contains a second label list (OE at pin 1, A2 at pin 28, GND at pin 22) that ma; The datasheet does not give a per-pin voltage limit for the I/O pins or the individual address pins "
],
"pages_sent": 17,
"cost_usd": 0.0655,
"at": "2026-10-30T18:24:27"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/0c8445a498a8e601eaa112f522d37f6e.pdf",
"pages": 17,
"sha256": "f00f572c17dec02e",
"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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"checked": "2026-10-30",
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}