component
ISD17120SY
Public Made by Adomby adom
Nuvoton Tech Audio Interface ICs, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "isd17120sy",
"title": "ISD17120SY",
"brief": "Nuvoton Tech Audio Interface ICs, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"communication interface chip-uart-485-232",
"isd17120sy",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ISD17120SY",
"manufacturer": "Nuvoton Tech",
"package": "SOIC-28-300mil",
"pin_count": 28,
"category": "Communication Interface Chip/UART/485/232",
"subcategory": "Audio Interface ICs",
"datasheet": "https://datasheet.lcsc.com/datasheet/pdf/393a2cab31970c4999f21768e3d9f4ba.pdf",
"parts": {
"symbol": "isd17120sy.kicad_sym",
"footprint": "isd17120sy.kicad_mod",
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"model_3d_plain": "isd17120sy-etched.glb",
"model_3d_step": "isd17120sy-etched.step",
"model_3d_step_plain": "isd17120sy.step",
"lbr": "isd17120sy.lbr"
},
"distributor_links": {
"lcsc": "C2613384",
"mouser": "503-ISD17120SY"
},
"distributor_check": {
"checked_at": "2026-10-30T22:50:57Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "no match"
},
"mouser": {
"pn": "503-ISD17120SY",
"status": "found",
"lifecycle": "Obsolete"
}
},
"pins": [
{
"number": "1",
"name": "VCCD",
"type": "power_in",
"description": "Digital power supply for digital circuitry, 2.4 V to 5.5 V operating range."
},
{
"number": "2",
"name": "LED",
"type": "output",
"description": "LED output that stays on during recording and blinks during playback, forward and erase operations."
},
{
"number": "3",
"name": "RESET",
"type": "input",
"description": "Active-low reset that puts the device into a known state."
},
{
"number": "4",
"name": "MISO",
"type": "tri_state",
"description": "SPI Master In Slave Out data output shifted out on the falling edge of SCLK, tri-state when SS is high."
},
{
"number": "5",
"name": "MOSI",
"type": "input",
"description": "SPI Master Out Slave In data input latched on the rising edge of SCLK."
},
{
"number": "6",
"name": "SCLK",
"type": "input",
"description": "Serial clock input of the SPI interface."
},
{
"number": "7",
"name": "SS",
"type": "input",
"description": "Active-low slave select that selects the device as an SPI slave and enables the SPI interface."
},
{
"number": "8",
"name": "VSSA",
"type": "power_in",
"description": "Analog ground path for analog circuitry."
},
{
"number": "9",
"name": "AnaIn",
"type": "input",
"description": "Auxiliary single-ended analog input for recording or feed-through, 1 V peak-to-peak input voltage."
},
{
"number": "10",
"name": "MIC+",
"type": "input",
"description": "Non-inverting input of the differential microphone signal, 15 to 300 mV peak-to-peak differential."
},
{
"number": "11",
"name": "MIC-",
"type": "input",
"description": "Inverting input of the differential microphone signal, 15 to 300 mV peak-to-peak differential."
},
{
"number": "12",
"name": "VSSP2",
"type": "power_in",
"description": "Ground path for the negative PWM speaker drive."
},
{
"number": "13",
"name": "SP-",
"type": "output",
"description": "Negative Class D PWM speaker output, drives an 8 ohm speaker or buzzer together with SP+."
},
{
"number": "14",
"name": "VCCP",
"type": "power_in",
"description": "Power supply for the PWM speaker driver."
},
{
"number": "15",
"name": "SP+",
"type": "output",
"description": "Positive Class D PWM speaker output, drives an 8 ohm speaker or buzzer together with SP-."
},
{
"number": "16",
"name": "VSSP1",
"type": "power_in",
"description": "Ground path for the positive PWM speaker drive."
},
{
"number": "17",
"name": "AUD/AUX",
"type": "output",
"description": "Auxiliary output configurable as an AUD (current) or AUX (voltage) single-ended output to drive an external amplifier."
},
{
"number": "18",
"name": "AGC",
"type": "passive",
"description": "Automatic gain control pin that adjusts the gain of the microphone preamplifier circuitry."
},
{
"number": "19",
"name": "VOL",
"type": "input",
"description": "Volume control input with 8 levels of volume adjustment."
},
{
"number": "20",
"name": "ROSC",
"type": "passive",
"description": "Oscillator resistor pin where an external resistor sets the sampling frequency (4 kHz to 12 kHz) and hence the message duration."
},
{
"number": "21",
"name": "VCCA",
"type": "power_in",
"description": "Analog power supply for analog circuitry."
},
{
"number": "22",
"name": "FT",
"type": "input",
"description": "Feed-through control that enables the feed-through path from AnaIn to the outputs."
},
{
"number": "23",
"name": "PLAY",
"type": "input",
"description": "Playback control that plays recorded messages individually or sequentially in a looping mode."
},
{
"number": "24",
"name": "REC",
"type": "input",
"description": "Record control that starts recording a message when active."
},
{
"number": "25",
"name": "ERASE",
"type": "input",
"description": "Erase control that erases an individual message or performs a global erase when active."
},
{
"number": "26",
"name": "FWD",
"type": "input",
"description": "Forward control that advances to the next message from the current location."
},
{
"number": "27",
"name": "INT/RDY",
"type": "output",
"description": "Open-drain output that indicates ready or interrupt status."
},
{
"number": "28",
"name": "VSSD",
"type": "power_in",
"description": "Digital ground path for digital circuitry."
}
],
"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+vision",
"consensus_model": "claude-opus-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The pinout drawing on page 7 shows no printed pin numbers. Numbers 1-14 down the left side and 28-15; The datasheet does not state the electrical type of the LED output or the AGC pin. LED is classed as",
"vision extraction: provenance cannot be text-verified; needs consensus"
],
"pages_sent": 26,
"cost_usd": 0.0827,
"at": "2026-10-30T22:50:45"
},
"datasheet": {
"url": "https://datasheet.lcsc.com/datasheet/pdf/393a2cab31970c4999f21768e3d9f4ba.pdf",
"pages": 26,
"sha256": "2c0b45f1bcc69e00",
"source_tier": "lcsc"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 28,
"described": 28,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
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"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
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17.9,
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"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "b889a13dbe9ec59e79fa9f1b5118b00bfa54f9582392335ff3365b64afc264b1",
"checked": "2026-10-30",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
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"sha256": "a5971768a48d8dd8368ff2d5865e4d00d8c241815d07d8c6ce99663ae2ad98d0",
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]
},
"metadata": {
"specs": {
"Manufacturer": "Nuvoton Tech",
"Package": "SOIC-28-300mil",
"Category": "Communication Interface Chip/UART/485/232",
"Pins": "28"
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"isd17120sy"
],
"discovery_pitch": "ISD17120SY (Nuvoton Tech) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
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}