component
SN74LS240N
Public Made by Adomby adom
lingxingic Buffers, Drivers, Receivers, Transceivers, DIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267
{
"slug": "sn74ls240n",
"version": "0.1.0",
"type": "component",
"description": "lingxingic Buffers, Drivers, Receivers, Transceivers, DIP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"logic",
"sn74ls240n",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"sn74ls240n.kicad_sym",
"sn74ls240n.kicad_mod",
"sn74ls240n.glb",
"sn74ls240n.step",
"sn74ls240n.lbr",
"docs/hero.png",
"docs/sn74ls240n-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"sn74ls240n-hero.glb",
"sn74ls240n-hero.overlay.json",
"sn74ls240n-etched.glb"
],
"component": {
"mpn": "SN74LS240N",
"manufacturer": "lingxingic",
"package": "DIP-20",
"pin_count": 20,
"category": "Logic",
"subcategory": "Buffers, Drivers, Receivers, Transceivers",
"datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603393143731462144",
"parts": {
"symbol": "sn74ls240n.kicad_sym",
"footprint": "sn74ls240n.kicad_mod",
"model_3d": "sn74ls240n-hero.glb",
"model_3d_plain": "sn74ls240n-etched.glb",
"model_3d_step": "sn74ls240n-etched.step",
"model_3d_step_plain": "sn74ls240n.step",
"lbr": "sn74ls240n.lbr"
},
"distributor_links": {
"lcsc": "C22449635",
"digikey": "296-1651-5-ND",
"mouser": "595-SN74LS240N"
},
"distributor_check": {
"checked_at": "2026-10-15T17:07:38Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": "296-1651-5-ND",
"status": "found",
"lifecycle": "Active"
},
"mouser": {
"pn": "595-SN74LS240N",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "1OE",
"type": "input",
"description": "Output enable input (active LOW) for outputs 1Y0 to 1Y3; a HIGH on this pin puts those outputs in the high-impedance OFF-state."
},
{
"number": "2",
"name": "1A0",
"type": "input",
"description": "Data input for inverting buffer channel 1Y0; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "3",
"name": "2Y0",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 2Y0, high-impedance when 2OE is HIGH."
},
{
"number": "4",
"name": "1A1",
"type": "input",
"description": "Data input for inverting buffer channel 1Y1; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "5",
"name": "2Y1",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 2Y1, high-impedance when 2OE is HIGH."
},
{
"number": "6",
"name": "1A2",
"type": "input",
"description": "Data input for inverting buffer channel 1Y2; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "7",
"name": "2Y2",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 2Y2, high-impedance when 2OE is HIGH."
},
{
"number": "8",
"name": "1A3",
"type": "input",
"description": "Data input for inverting buffer channel 1Y3; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "9",
"name": "2Y3",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 2Y3, high-impedance when 2OE is HIGH."
},
{
"number": "10",
"name": "GND",
"type": "power_in",
"description": "Ground (0V) reference for all voltages on the device."
},
{
"number": "11",
"name": "2A3",
"type": "input",
"description": "Data input for inverting buffer channel 2Y3; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "12",
"name": "1Y3",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 1Y3, high-impedance when 1OE is HIGH."
},
{
"number": "13",
"name": "2A2",
"type": "input",
"description": "Data input for inverting buffer channel 2Y2; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "14",
"name": "1Y2",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 1Y2, high-impedance when 1OE is HIGH."
},
{
"number": "15",
"name": "2A1",
"type": "input",
"description": "Data input for inverting buffer channel 2Y1; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "16",
"name": "1Y1",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 1Y1, high-impedance when 1OE is HIGH."
},
{
"number": "17",
"name": "2A0",
"type": "input",
"description": "Data input for inverting buffer channel 2Y0; inputs include clamp diodes that allow current-limiting resistors for interfacing to voltages above VCC."
},
{
"number": "18",
"name": "1Y0",
"type": "tri_state",
"description": "Inverting 3-state bus output of channel 1Y0, high-impedance when 1OE is HIGH."
},
{
"number": "19",
"name": "2OE",
"type": "input",
"description": "Output enable input (active LOW) for outputs 2Y0 to 2Y3; a HIGH on this pin puts those outputs in the high-impedance OFF-state."
},
{
"number": "20",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage; the recommended operating range is 2.0 V to 6.0 V (Section 3.2, page 8)."
}
],
"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 datasheet covers DIP20, SOP20 and TSSOP20 but its pin table (Section 2.3) is not labeled per pac; Output pins are typed tri_state because the datasheet describes them as 3-state outputs with a high-; The VCC description cites the recommended range from Section 3.2 (page 8), while the pin entry itsel"
],
"pages_sent": 20,
"cost_usd": 0.0631,
"at": "2026-10-15T17:07:16"
},
"datasheet": {
"url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603393143731462144",
"pages": 20,
"sha256": "db7d61c9fa478552",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 20,
"described": 20,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "sn74ls240n.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,
26.162,
6.98
],
"zmin_mm": -3.3,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "ca359c9b9e0ce94efcb6c96866513f659eef6517d629ace3c4a0a779f6fd57bb",
"checked": "2026-10-15",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "sn74ls240n-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,
26.162,
6.98
],
"zmin_mm": -3.3,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "7851bf972c8710677079682350c3b7e02aeb389c4d174984bf3cf4d7586921e5",
"checked": "2026-10-15",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
}
}