component

ISD17120SY

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by adom

Nuvoton Tech Audio Interface ICs, SOIC-28-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentcommunication interface chip-uart-485-232isd17120syfactory-2.0.0extractor-text

Verified ISD17120SY

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier lcsc, 28 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ISD17120SY · SOIC-28-300mil · 28 pins
  • ✓copper: 28 copper pads, none touching another net
  • ✓datasheet: all 28 pin names found in the 26-page datasheet
  • •distributor (warn): no ['digikey'] number
  • ✓family: SOIC-28W_7.5x17.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-z0g_9b6p/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 28 pins = 28 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 28 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ isd17120sy.kicad_sym✓ isd17120sy.kicad_mod✓ isd17120sy.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 20h ago
viewers isd17120sy: viewers · Ray 20h ago
isd17120sy-etched.glb Publish 0.1.0 · Ray 20h ago
isd17120sy-etched.step isd17120sy: factory component page (tier=lcsc) · Ray 20h ago
isd17120sy-hero.glb isd17120sy: hero GLB from the etched model (keeps the MPN mark) · Ray 20h ago
isd17120sy-hero.overlay.json Publish 0.1.0 · Ray 20h ago
isd17120sy.glb Publish 0.1.0 · Ray 20h ago
isd17120sy.kicad_mod Publish 0.1.0 · Ray 20h ago
isd17120sy.kicad_sym Publish 0.1.0 · Ray 20h ago
isd17120sy.lbr Publish 0.1.0 · Ray 20h ago
isd17120sy.step Publish 0.1.0 · Ray 20h ago
package.json Publish 0.1.0 · Ray 20h ago
page.json Set visibility: public · Ray 20h ago
README.md Publish 0.1.0 · Ray 20h ago
verification.json Verified: Published by the parts factory: tier lcsc, 28 pins · Ray 20h ago

ISD17120SY

Nuvoton Tech · Audio Interface ICs · SOIC-28-300mil

ISD17120SY from Nuvoton Tech, in a SOIC-28-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VCCD power_in Digital power supply for digital circuitry, 2.4 V to 5.5 V operating range.
2 LED output LED output that stays on during recording and blinks during playback, forward and erase operations.
3 RESET input Active-low reset that puts the device into a known state.
4 MISO tri_state SPI Master In Slave Out data output shifted out on the falling edge of SCLK, tri-state when SS is high.
5 MOSI input SPI Master Out Slave In data input latched on the rising edge of SCLK.
6 SCLK input Serial clock input of the SPI interface.
7 SS input Active-low slave select that selects the device as an SPI slave and enables the SPI interface.
8 VSSA power_in Analog ground path for analog circuitry.
9 AnaIn input Auxiliary single-ended analog input for recording or feed-through, 1 V peak-to-peak input voltage.
10 MIC+ input Non-inverting input of the differential microphone signal, 15 to 300 mV peak-to-peak differential.
11 MIC- input Inverting input of the differential microphone signal, 15 to 300 mV peak-to-peak differential.
12 VSSP2 power_in Ground path for the negative PWM speaker drive.
13 SP- output Negative Class D PWM speaker output, drives an 8 ohm speaker or buzzer together with SP+.
14 VCCP power_in Power supply for the PWM speaker driver.
15 SP+ output Positive Class D PWM speaker output, drives an 8 ohm speaker or buzzer together with SP-.
16 VSSP1 power_in Ground path for the positive PWM speaker drive.
17 AUD/AUX output Auxiliary output configurable as an AUD (current) or AUX (voltage) single-ended output to drive an external amplifier.
18 AGC passive Automatic gain control pin that adjusts the gain of the microphone preamplifier circuitry.
19 VOL input Volume control input with 8 levels of volume adjustment.
20 ROSC passive Oscillator resistor pin where an external resistor sets the sampling frequency (4 kHz to 12 kHz) and hence the message duration.
21 VCCA power_in Analog power supply for analog circuitry.
22 FT input Feed-through control that enables the feed-through path from AnaIn to the outputs.
23 PLAY input Playback control that plays recorded messages individually or sequentially in a looping mode.
24 REC input Record control that starts recording a message when active.
25 ERASE input Erase control that erases an individual message or performs a global erase when active.
26 FWD input Forward control that advances to the next message from the current location.
27 INT/RDY output Open-drain output that indicates ready or interrupt status.
28 VSSD power_in Digital ground path for digital circuitry.

Key specifications

Parameter Value
Manufacturer Nuvoton Tech
Package SOIC-28-300mil
Category Communication Interface Chip/UART/485/232
Pins 28

CAD (KiCad official)

  • Symbol: ISD17120SY
  • Footprint: Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm
  • 3D model: SOIC-28-300mil (KiCad packages3D, STEP)
  • 3D model files: isd17120sy-etched.step / isd17120sy-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); isd17120sy.step / isd17120sy.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Nuvoton Tech datasheet (26 pp, sha256 2c0b45f1bcc69e00, retrieved 2026-10-30, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF