component
AT28HC64B-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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"version": "0.1.0",
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"description": "Microchip Tech Pre-ordered MCUs, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"docs/at28hc64b-70su-datasheet.pdf",
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"component": {
"mpn": "AT28HC64B-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/a229aed44259947456af62519294a0a0.pdf",
"parts": {
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"distributor_links": {
"lcsc": "C609694",
"digikey": "AT28HC64B-70SU-ND",
"mouser": "556-AT28HC64B70SU"
},
"distributor_check": {
"checked_at": "2026-10-28T16:14:16Z",
"source": "Component Ocean /api/assign-pns",
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"pins": [
{
"number": "1",
"name": "NC",
"type": "unconnected",
"description": "No connect; this pin has no internal connection and is left unconnected."
},
{
"number": "2",
"name": "A12",
"type": "input",
"description": "Address input A12 selects the memory location, and A6 to A12 must hold the same page address during a page write."
},
{
"number": "3",
"name": "A7",
"type": "input",
"description": "Address input A7 selects the memory location, and A6 to A12 must hold the same page address during a page write."
},
{
"number": "4",
"name": "A6",
"type": "input",
"description": "Address input A6 selects the memory location, and A6 to A12 must hold the same page address during a page write."
},
{
"number": "5",
"name": "A5",
"type": "input",
"description": "Address input A5 selects the memory location, and A0 to A5 specify which bytes within the page are written."
},
{
"number": "6",
"name": "A4",
"type": "input",
"description": "Address input A4 selects the memory location, and A0 to A5 specify which bytes within the page are written."
},
{
"number": "7",
"name": "A3",
"type": "input",
"description": "Address input A3 selects the memory location, and A0 to A5 specify which bytes within the page are written."
},
{
"number": "8",
"name": "A2",
"type": "input",
"description": "Address input A2 selects the memory location, and A0 to A5 specify which bytes within the page are written."
},
{
"number": "9",
"name": "A1",
"type": "input",
"description": "Address input A1 selects the memory location, and A0 to A5 specify which bytes within the page are written."
},
{
"number": "10",
"name": "A0",
"type": "input",
"description": "Address input A0 selects the memory location, and A0 to A5 specify which bytes within the page are written."
},
{
"number": "11",
"name": "I/O0",
"type": "bidirectional",
"description": "Data input/output bit 0; outputs are high-impedance when CE or OE is high."
},
{
"number": "12",
"name": "I/O1",
"type": "bidirectional",
"description": "Data input/output bit 1; outputs are high-impedance when CE or OE is high."
},
{
"number": "13",
"name": "I/O2",
"type": "bidirectional",
"description": "Data input/output bit 2; outputs are high-impedance when CE or OE is high."
},
{
"number": "14",
"name": "GND",
"type": "power_in",
"description": "Ground reference for the device."
},
{
"number": "15",
"name": "I/O3",
"type": "bidirectional",
"description": "Data input/output bit 3; outputs are high-impedance when CE or OE is high."
},
{
"number": "16",
"name": "I/O4",
"type": "bidirectional",
"description": "Data input/output bit 4; outputs are high-impedance when CE or OE is high."
},
{
"number": "17",
"name": "I/O5",
"type": "bidirectional",
"description": "Data input/output bit 5; outputs are high-impedance when CE or OE is high."
},
{
"number": "18",
"name": "I/O6",
"type": "bidirectional",
"description": "Data input/output bit 6; it toggles during a write cycle and is used for Toggle Bit end-of-write detection."
},
{
"number": "19",
"name": "I/O7",
"type": "bidirectional",
"description": "Data input/output bit 7; during a write it presents the complement of the written data for DATA Polling."
},
{
"number": "20",
"name": "CE",
"type": "input",
"description": "Chip enable; with OE low and WE high, CE low selects the device for read, and CE high deselects it and puts outputs in high-impedance."
},
{
"number": "21",
"name": "A10",
"type": "input",
"description": "Address input A10 selects the memory location."
},
{
"number": "22",
"name": "OE",
"type": "input",
"description": "Output enable; with CE low and WE high, the addressed data is driven onto I/O0 to I/O7."
},
{
"number": "23",
"name": "A11",
"type": "input",
"description": "Address input A11 selects the memory location, and A6 to A12 must hold the same page address during a page write."
},
{
"number": "24",
"name": "A9",
"type": "input",
"description": "Address input A9; raising it to 12 V ±0.5 V enables access to the 64-byte device identification block at 1FC0H to 1FFFH."
},
{
"number": "25",
"name": "A8",
"type": "input",
"description": "Address input A8 selects the memory location, and A6 to A12 must hold the same page address during a page write."
},
{
"number": "26",
"name": "NC",
"type": "unconnected",
"description": "No connect; this pin has no internal connection and is left unconnected."
},
{
"number": "27",
"name": "WE",
"type": "input",
"description": "Write enable; a low pulse on WE with CE low initiates a write cycle."
},
{
"number": "28",
"name": "VCC",
"type": "power_in",
"description": "Single 5 V ±10% power supply."
}
],
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"guards": "pin_guards 0.1: passed",
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"pages": 17,
"sha256": "4d1c81d44d8fce71",
"source_tier": "mfr"
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"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
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"described": 28,
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