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NAU8814YG

Public Made by Adom

by adom

Nuvoton Tech Audio Interface ICs, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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NAU8814YG

Nuvoton Tech · Audio Interface ICs · QFN-24-EP(4x4)

NAU8814YG from Nuvoton Tech, in a QFN-24-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 MICBIAS output Microphone bias output supplying low-noise reference voltage with up to 3mA bias current and seven selectable levels from 0.50VDDA to 0.90VDDA.
2 VDDA power_in Analog power supply voltage input, operating range 2.5V to 3.6V.
3 VSSA power_in Analog ground reference.
4 VDDC power_in Digital core power supply voltage input, operating range 1.71V to 3.6V.
5 VDDB power_in Digital buffer power supply voltage input, operating range 1.71V to 3.6V (must be ≥ VDDC).
6 VSSD power_in Digital ground reference.
7 ADCOUT output Digital audio data output from ADC supporting Right Justified, Left Justified, I2S, PCM, and PCM Time Slot formats.
8 DACIN input Digital audio data input to DAC supporting Right Justified, Left Justified, I2S, PCM, and PCM Time Slot formats.
9 FS bidirectional Frame Sync input in slave mode or output in master mode, synchronized with audio sample period.
10 BCLK bidirectional Bit Clock input in slave mode or output in master mode, synchronized with digital audio bits.
11 MCLK input Master clock input for PLL reference and audio codec timing, supporting 2.7MHz to 26.0MHz.
12 CSb/GPIO bidirectional SPI chip select (active low) input or configurable general purpose I/O pin for Jack Detect, Temperature Alert, or PLL clock output.
13 SCLK input Serial clock input for SPI or 2-Wire I2C-style control interface timing.
14 SDIO bidirectional Serial data pin for SPI data input or 2-Wire open-drain serial data used for register access and device control.
15 MODE input Interface mode select input sampled at reset, selects 2-Wire (low) or SPI (high) control protocol.
16 MOUT output Single-ended mono line/headphone output capable of driving 16Ω to 32Ω loads or line-level outputs.
17 SPKOUT+ output Positive output of differential Bridge-Tied Load speaker driver, capable of 1W output into 8Ω load at 5V supply.
18 VSSSPK power_in Speaker output ground reference.
19 SPKOUT- output Negative output of differential Bridge-Tied Load speaker driver, capable of 1W output into 8Ω load at 5V supply.
20 VDDSPK power_in Speaker power supply voltage input, operating range 2.5V to 5.5V with boost mode dependent on configuration.
21 AUX input Single-ended auxiliary input with 20kΩ input impedance, maximum signal level -3dB relative to full scale.
22 VREF power_in Internal mid-supply reference voltage output (nominally 0.5*VDDA) requiring external 1-10µF decoupling capacitor.
23 MIC- input Differential microphone negative input with programmable gain amplifier, input impedance 1.6kΩ to 75kΩ depending on gain setting.
24 MIC+ input Differential microphone positive input with programmable gain amplifier, fixed input impedance approximately 94kΩ.
25 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Nuvoton Tech
Package QFN-24-EP(4x4)
Category Interface
Pins 25

CAD (KiCad official)

  • Symbol: NAU8814YG
  • Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm
  • 3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: nau8814yg-etched.step / nau8814yg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); nau8814yg.step / nau8814yg.glb are the bare package body.

Provenance

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

  • Datasheet: Nuvoton Tech datasheet (110 pp, sha256 a8e8cf219826c34f, retrieved 2026-09-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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