component
MC74VHC244DTG
Public Made by Adomby adom
onsemi Buffers / Drivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "mc74vhc244dtg",
"version": "0.1.0",
"type": "component",
"description": "onsemi Buffers / Drivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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"logic ics",
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"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
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"path": "docs/hero.png"
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"mc74vhc244dtg.step",
"mc74vhc244dtg.lbr",
"docs/hero.png",
"docs/mc74vhc244dtg-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"mc74vhc244dtg-hero.glb",
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"mc74vhc244dtg-etched.glb"
],
"component": {
"mpn": "MC74VHC244DTG",
"manufacturer": "onsemi",
"package": "TSSOP-20",
"pin_count": 20,
"category": "Logic ICs",
"subcategory": "Buffers / Drivers",
"datasheet": "https://www.onsemi.com/pdf/datasheet/mc74vhc244dt-d.pdf",
"parts": {
"symbol": "mc74vhc244dtg.kicad_sym",
"footprint": "mc74vhc244dtg.kicad_mod",
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"model_3d_step_plain": "mc74vhc244dtg.step",
"lbr": "mc74vhc244dtg.lbr"
},
"distributor_links": {
"lcsc": "C897456",
"digikey": "488-MC74VHC244DTG-ND",
"mouser": "863-MC74VHC244DTG"
},
"distributor_check": {
"checked_at": "2026-10-30T21:33:06Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "488-MC74VHC244DTG-ND",
"status": "found",
"lifecycle": "Active"
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"mouser": {
"pn": "863-MC74VHC244DTG",
"status": "found"
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},
"pins": [
{
"number": "1",
"name": "OEA",
"type": "input",
"description": "Active-low output enable for the YA1-YA4 outputs; when high, the YA outputs are placed in the high-impedance (Z) state per the function table."
},
{
"number": "2",
"name": "A1",
"type": "input",
"description": "Data input for buffer 1 of the A bank, passed noninverted to YA1 when OEA is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "3",
"name": "YB4",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the B bank, high-impedance when OEB is high; maximum DC output current is 25 mA per pin."
},
{
"number": "4",
"name": "A2",
"type": "input",
"description": "Data input for buffer 2 of the A bank, passed noninverted to YA2 when OEA is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "5",
"name": "YB3",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the B bank, high-impedance when OEB is high; maximum DC output current is 25 mA per pin."
},
{
"number": "6",
"name": "A3",
"type": "input",
"description": "Data input for buffer 3 of the A bank, passed noninverted to YA3 when OEA is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "7",
"name": "YB2",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the B bank, high-impedance when OEB is high; maximum DC output current is 25 mA per pin."
},
{
"number": "8",
"name": "A4",
"type": "input",
"description": "Data input for buffer 4 of the A bank, passed noninverted to YA4 when OEA is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "9",
"name": "YB1",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the B bank, high-impedance when OEB is high; maximum DC output current is 25 mA per pin."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground reference; all device voltages are referenced to GND, and the recommended VCC range is 2.0 V to 5.5 V."
},
{
"number": "11",
"name": "B4",
"type": "input",
"description": "Data input for buffer 4 of the B bank, passed noninverted to YB4 when OEB is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "12",
"name": "YA4",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the A bank, high-impedance when OEA is high; maximum DC output current is 25 mA per pin."
},
{
"number": "13",
"name": "B3",
"type": "input",
"description": "Data input for buffer 3 of the B bank, passed noninverted to YB3 when OEB is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "14",
"name": "YA3",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the A bank, high-impedance when OEA is high; maximum DC output current is 25 mA per pin."
},
{
"number": "15",
"name": "B2",
"type": "input",
"description": "Data input for buffer 2 of the B bank, passed noninverted to YB2 when OEB is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "16",
"name": "YA2",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the A bank, high-impedance when OEA is high; maximum DC output current is 25 mA per pin."
},
{
"number": "17",
"name": "B1",
"type": "input",
"description": "Data input for buffer 1 of the B bank, passed noninverted to YB1 when OEB is low; the datasheet recommends VIN between 0 V and 5.5 V."
},
{
"number": "18",
"name": "YA1",
"type": "tri_state",
"description": "Noninverting 3-state buffer output of the A bank, high-impedance when OEA is high; maximum DC output current is 25 mA per pin."
},
{
"number": "19",
"name": "OEB",
"type": "input",
"description": "Active-low output enable for the YB1-YB4 outputs; when high, the YB outputs are placed in the high-impedance (Z) state per the function table."
},
{
"number": "20",
"name": "VCC",
"type": "power_in",
"description": "Positive DC supply; the datasheet specifies a recommended operating range of 2.0 V to 5.5 V and an absolute maximum of 7.0 V."
}
],
"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 PIN ASSIGNMENT text on page 1 is scrambled by text extraction (labels and pin numbers are not in; The datasheet does not give per-pin electrical limits beyond the device-level ratings, so the pin de"
],
"pages_sent": 8,
"cost_usd": 0.0798,
"at": "2026-10-30T21:32:47"
},
"datasheet": {
"url": "https://www.onsemi.com/pdf/datasheet/mc74vhc244dt-d.pdf",
"pages": 8,
"sha256": "9dd1c8301742cae4",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
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"footprint": "viewers/footprint.html"
},
"models_3d": [
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"file": "mc74vhc244dtg.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.4,
6.5,
1.2
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "mc74vhc244dtg-etched.step",
"role": "eda",
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"seat": "z = 0",
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"footprint_binding": "identity",
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],
"package_dims": {
"package_code": "TSSOP-20 (DT suffix, CASE 948E)",
"source_page": 7,
"D": {
"nom_mm": 6.5,
"range_mm": [
6.4,
6.6
]
},
"E1": {
"nom_mm": 4.4,
"range_mm": [
4.3,
4.5
]
},
"E": {
"nom_mm": 6.4,
"range_mm": [
null,
null
]
},
"e": {
"nom_mm": 0.65,
"range_mm": [
null,
null
]
},
"A": {
"nom_mm": 1.2,
"range_mm": [
null,
1.2
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "mc74vhc244dtg.step",
"verdict": "PASS",
"reasons": [
"height and body within the datasheet's package drawing"
],
"by": "factory/package_fit.py"
}
}
}
}