component
CA-IS3731LW
Public Made by Adomby adom
Chipanalog Digital Isolators, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
Ray
Publish 0.1.0
273e24e
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{
"slug": "ca-is3731lw",
"version": "0.1.0",
"type": "component",
"description": "Chipanalog Digital Isolators, SOIC-16-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"tags": [
"component",
"interface ics",
"ca-is3731lw",
"factory-2.0.0",
"extractor-text"
],
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"ca-is3731lw.kicad_sym",
"ca-is3731lw.kicad_mod",
"ca-is3731lw.glb",
"ca-is3731lw.step",
"ca-is3731lw.lbr",
"docs/hero.png",
"docs/ca-is3731lw-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"ca-is3731lw-hero.glb",
"ca-is3731lw-hero.overlay.json",
"ca-is3731lw-etched.glb"
],
"component": {
"mpn": "CA-IS3731LW",
"manufacturer": "Chipanalog",
"package": "SOIC-16-300mil",
"pin_count": 16,
"category": "Interface ICs",
"subcategory": "Digital Isolators",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/ccf1ee7e77798d5878d659511d2a8dbf.pdf",
"parts": {
"symbol": "ca-is3731lw.kicad_sym",
"footprint": "ca-is3731lw.kicad_mod",
"model_3d": "ca-is3731lw-hero.glb",
"model_3d_plain": "ca-is3731lw-etched.glb",
"model_3d_step": "ca-is3731lw-etched.step",
"model_3d_step_plain": "ca-is3731lw.step",
"lbr": "ca-is3731lw.lbr"
},
"distributor_links": {
"lcsc": "C541880"
},
"distributor_check": {
"checked_at": "2026-11-12T06:45:37Z",
"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": "A-side supply voltage; recommended range is 2.375 V to 5.5 V (typical 3.3 V), with a 0.1 µF to 1 µF bypass capacitor per the application note."
},
{
"number": "2",
"name": "GNDA",
"type": "power_in",
"description": "A-side ground reference point for the isolated input-side circuitry."
},
{
"number": "3",
"name": "VI1",
"type": "input",
"description": "A-side logic input for channel 1 (forward channel, A to B)."
},
{
"number": "4",
"name": "VI2",
"type": "input",
"description": "A-side logic input for channel 2 (forward channel, A to B)."
},
{
"number": "5",
"name": "VO3",
"type": "output",
"description": "On CA-IS3731 this pin is the A-side logic output of the reverse channel (B to A); the same physical pin is VI3/VO3 on the CA-IS3730."
},
{
"number": "6",
"name": "NC",
"type": "unconnected",
"description": "No internal connection; may be left floating, tied to VDD, or tied to GND."
},
{
"number": "7",
"name": "ENA",
"type": "input",
"description": "A-side enable input, active high, internally pulled up to the local VDD; leave floating or connect to a defined logic level, and avoid routing traces to it when floating in noisy environments."
},
{
"number": "8",
"name": "GNDA",
"type": "power_in",
"description": "A-side ground reference point for the isolated input-side circuitry."
},
{
"number": "9",
"name": "GNDB",
"type": "power_in",
"description": "B-side ground reference point for the isolated output-side circuitry."
},
{
"number": "10",
"name": "ENB",
"type": "input",
"description": "B-side enable input, active high, internally pulled up to the local VDD; when low the B-side outputs go to high impedance."
},
{
"number": "11",
"name": "NC",
"type": "unconnected",
"description": "No internal connection; may be left floating, tied to VDD, or tied to GND."
},
{
"number": "12",
"name": "VI3",
"type": "input",
"description": "On CA-IS3731 this pin is the B-side logic input of the reverse channel (B to A); the same physical pin is VI3/VO3 on the CA-IS3730."
},
{
"number": "13",
"name": "VO2",
"type": "output",
"description": "B-side logic output for channel 2 (forward channel, A to B), tri-state controlled by ENB."
},
{
"number": "14",
"name": "VO1",
"type": "output",
"description": "B-side logic output for channel 1 (forward channel, A to B), tri-state controlled by ENB."
},
{
"number": "15",
"name": "GNDB",
"type": "power_in",
"description": "B-side ground reference point for the isolated output-side circuitry."
},
{
"number": "16",
"name": "VDDB",
"type": "power_in",
"description": "B-side supply voltage; recommended range is 2.375 V to 5.5 V (typical 3.3 V), with a 0.1 µF to 1 µF bypass capacitor per the application note."
}
],
"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: Pins 5 and 12 are multi-function (VI3/VO3). The pin type shown is for the CA-IS3731 (pin 5 = A-side ; The 2.375 V to 5.5 V supply range is stated in the recommended operating conditions table on page 5,; Table 5-1 lists NC1/ENA2 for pin 7. For CA-IS3731 the figure labels this pin ENA, so it is treated a"
],
"pages_sent": 23,
"cost_usd": 0.006,
"at": "2026-11-12T06:45:29"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/ccf1ee7e77798d5878d659511d2a8dbf.pdf",
"pages": 23,
"sha256": "27de2cc191feda49",
"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-is3731lw.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
10.3,
10.3,
2.75
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "159663ceb2b4996b1b89d3111e4a355fc27de3e24d3570f50e5ed9086e0d73af",
"checked": "2026-11-12",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "ca-is3731lw-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
10.3,
10.3,
2.75
],
"zmin_mm": -0.0,
"centre_offset_mm": 0.0,
"footprint_binding": "identity",
"sha256": "d98bf3aa790ca2ee11be5b1574be4bb435a9db4a928a8379a79c70f81dc714b4",
"checked": "2026-11-12",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
],
"package_dims": {
"package_code": "SOIC16-WB (W)",
"source_page": 20,
"D": {
"nom_mm": 10.3,
"range_mm": [
10.1,
10.5
]
},
"E1": {
"nom_mm": 7.5,
"range_mm": [
7.4,
7.6
]
},
"E": {
"nom_mm": 10.3,
"range_mm": [
10.2,
10.4
]
},
"e": {
"nom_mm": 1.27,
"range_mm": [
null,
null
]
},
"A": {
"nom_mm": 2.65,
"range_mm": [
null,
2.65
]
},
"source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
"model_check": {
"file": "ca-is3731lw.step",
"verdict": "PASS",
"reasons": [
"height and body within the datasheet's package drawing"
],
"by": "factory/package_fit.py"
}
}
}
}