component
AT28HC256E-12SU
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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"manufacturer": "Microchip Tech",
"package": "SOIC-28-300mil",
"pin_count": 28,
"category": "Embedded Processors & Controllers",
"subcategory": "Pre-ordered MCUs",
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"digikey": "AT28HC256E-12SU-ND",
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"pins": [
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"number": "1",
"name": "A14",
"type": "input",
"description": "Address input A14 for the 32,768 x 8 memory array."
},
{
"number": "2",
"name": "A12",
"type": "input",
"description": "Address input A12 for the 32,768 x 8 memory array."
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{
"number": "3",
"name": "A7",
"type": "input",
"description": "Address input A7 for the 32,768 x 8 memory array."
},
{
"number": "4",
"name": "A6",
"type": "input",
"description": "Address input A6 for the 32,768 x 8 memory array."
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{
"number": "5",
"name": "A5",
"type": "input",
"description": "Address input A5 for the 32,768 x 8 memory array."
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{
"number": "6",
"name": "A4",
"type": "input",
"description": "Address input A4 for the 32,768 x 8 memory array."
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{
"number": "7",
"name": "A3",
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"description": "Address input A3 for the 32,768 x 8 memory array."
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{
"number": "8",
"name": "A2",
"type": "input",
"description": "Address input A2 for the 32,768 x 8 memory array."
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{
"number": "9",
"name": "A1",
"type": "input",
"description": "Address input A1 for the 32,768 x 8 memory array."
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{
"number": "10",
"name": "A0",
"type": "input",
"description": "Address input A0 for the 32,768 x 8 memory array."
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{
"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 reference for the device."
},
{
"number": "15",
"name": "I/O3",
"type": "bidirectional",
"description": "Data input/output bit 3."
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{
"number": "16",
"name": "I/O4",
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"description": "Data input/output bit 4."
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{
"number": "17",
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{
"number": "18",
"name": "I/O6",
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{
"number": "19",
"name": "I/O7",
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"description": "Data input/output bit 7; DATA Polling of I/O7 indicates the end of a write cycle."
},
{
"number": "20",
"name": "CE",
"type": "input",
"description": "Chip Enable input."
},
{
"number": "21",
"name": "A10",
"type": "input",
"description": "Address input A10 for the 32,768 x 8 memory array."
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{
"number": "22",
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"description": "Output Enable input."
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{
"number": "23",
"name": "A11",
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"description": "Address input A11 for the 32,768 x 8 memory array."
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{
"number": "24",
"name": "A9",
"type": "input",
"description": "Address input A9 for the 32,768 x 8 memory array."
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{
"number": "25",
"name": "A8",
"type": "input",
"description": "Address input A8 for the 32,768 x 8 memory array."
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{
"number": "26",
"name": "A13",
"type": "input",
"description": "Address input A13 for the 32,768 x 8 memory array."
},
{
"number": "27",
"name": "WE",
"type": "input",
"description": "Write Enable input."
},
{
"number": "28",
"name": "VCC",
"type": "power_in",
"description": "Device power supply, single 5V ±10% supply."
}
],
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"extractor flagged: The MPN AT28HC256E-12SU is not listed in the ordering tables. Table 12-1 lists AT28HC256-12SU (SO pa"
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"at": "2026-10-28T16:16:44"
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