component
CA-IS3731LN
Public Made by Adomby adom
Chipanalog Digital Isolators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"slug": "ca-is3731ln",
"version": "0.1.0",
"type": "component",
"description": "Chipanalog Digital Isolators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"interface ics",
"ca-is3731ln",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"ca-is3731ln.kicad_sym",
"ca-is3731ln.kicad_mod",
"ca-is3731ln.glb",
"ca-is3731ln.step",
"ca-is3731ln.lbr",
"docs/hero.png",
"docs/ca-is3731ln-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"ca-is3731ln-hero.glb",
"ca-is3731ln-hero.overlay.json",
"ca-is3731ln-etched.glb"
],
"component": {
"mpn": "CA-IS3731LN",
"manufacturer": "Chipanalog",
"package": "SOIC-16",
"pin_count": 16,
"category": "Interface ICs",
"subcategory": "Digital Isolators",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8700b2ce73cb7f7b4e06c135cf8dbcd7.pdf",
"parts": {
"symbol": "ca-is3731ln.kicad_sym",
"footprint": "ca-is3731ln.kicad_mod",
"model_3d": "ca-is3731ln-hero.glb",
"model_3d_plain": "ca-is3731ln-etched.glb",
"model_3d_step": "ca-is3731ln-etched.step",
"model_3d_step_plain": "ca-is3731ln.step",
"lbr": "ca-is3731ln.lbr"
},
"distributor_links": {
"lcsc": "C428886"
},
"distributor_check": {
"checked_at": "2026-10-31T18:36:03Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": null,
"status": "no match"
}
},
"pins": [
{
"number": "1",
"name": "VDDA",
"type": "power_in",
"description": "Side A power supply, 2.375 V to 5.5 V recommended, with a 0.1 µF to 1 µF bypass capacitor."
},
{
"number": "2",
"name": "GNDA",
"type": "power_in",
"description": "Side A ground."
},
{
"number": "3",
"name": "A1",
"type": "input",
"description": "Side A digital input (channel 1, isolated to B1)."
},
{
"number": "4",
"name": "A2",
"type": "input",
"description": "Side A digital input (channel 2, isolated to B2)."
},
{
"number": "5",
"name": "A3",
"type": "output",
"description": "Side A digital output for CA-IS3731 (reverse channel from B3); tri-stated when ENA is low."
},
{
"number": "6",
"name": "NC",
"type": "unconnected",
"description": "No connect; not internally connected, can be left floating, tied to VDD or tied to GND."
},
{
"number": "7",
"name": "ENA",
"type": "input",
"description": "Side A active-high enable, internally pulled up to VDDA; low puts output A3 in high impedance."
},
{
"number": "8",
"name": "GNDA",
"type": "power_in",
"description": "Side A ground."
},
{
"number": "9",
"name": "GNDB",
"type": "power_in",
"description": "Side B ground."
},
{
"number": "10",
"name": "ENB",
"type": "input",
"description": "Side B active-high enable, internally pulled up to VDDB; low puts outputs B1, B2 in high impedance."
},
{
"number": "11",
"name": "NC",
"type": "unconnected",
"description": "No connect; not internally connected, can be left floating, tied to VDD or tied to GND."
},
{
"number": "12",
"name": "B3",
"type": "input",
"description": "Side B digital input for CA-IS3731 (channel 3, isolated to A3)."
},
{
"number": "13",
"name": "B2",
"type": "output",
"description": "Side B digital output."
},
{
"number": "14",
"name": "B1",
"type": "output",
"description": "Side B digital output."
},
{
"number": "15",
"name": "GNDB",
"type": "power_in",
"description": "Side B ground."
},
{
"number": "16",
"name": "VDDB",
"type": "power_in",
"description": "Side B power supply, 2.375 V to 5.5 V recommended, with a 0.1 µF to 1 µF bypass capacitor."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-sonnet-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Pin table lists A3 and B3 as 'Digital I/O'; directions (A3 output, B3 input) inferred from the text ; Table 9-2 mentions output A4 and B4, which do not exist on this 16-pin device; ENB effect on B1/B2 (; Pin table names pins 7 and 10 'NC1/ENx' (NC for other variants); for CA-IS3731 they are ENA/ENB per "
],
"pages_sent": 19,
"cost_usd": 0.1886,
"at": "2026-10-31T18:35:42"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/8700b2ce73cb7f7b4e06c135cf8dbcd7.pdf",
"pages": 19,
"sha256": "ef3209513577c58b",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 16,
"described": 16,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "ca-is3731ln.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.0,
9.9,
1.75
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ca-is3731ln-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
6.0,
9.9,
1.75
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "f626e97b55bfbdce8523361a64536240aa56ebdb398f321dfcbbc9ead6e94eb7",
"checked": "2026-10-31",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "SOIC-16 NB (N)",
"source_page": 19,
"D": {
"nom_mm": 9.9,
"range_mm": [
9.8,
10.0
]
},
"E1": {
"nom_mm": 3.9,
"range_mm": [
3.8,
4.0
]
},
"E": {
"nom_mm": 6.0,
"range_mm": [
5.8,
6.2
]
},
"e": {
"nom_mm": 1.27,
"range_mm": [
null,
null
]
},
"A": {
"nom_mm": 1.75,
"range_mm": [
null,
1.75
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "ca-is3731ln.step",
"verdict": "PASS",
"reasons": [
"height and body within the datasheet's package drawing"
],
"by": "factory/package_fit.py"
}
}
}
}