NAU88L21YG

NAU88L21YG is a two‑channel, low‑power stereo audio CODEC from Nuvoton. It integrates ADC and DAC for mic/line-in to line-out/headphone output, with a digital audio interface (I2S/PCM) and an I2C control port for register configuration. It supports common 16–24‑bit word lengths and typical sampling rates, and includes a headphone driver and microphone bias for portable/embedded audio. The YG suffix denotes a specific package/variant (RoHS lead‑free). In use, you configure routing and power via I2C and stream audio data via I2S to/from the CODEC. It’s suited for microcontroller projects, SBCs, and other embedded audio applications requiring external A/D‑D/A conversion.

NAU88L21YG equivalents are other low‑power stereo audio CODECs with I2S/I2C control and integrated headphone drivers. Common substitutes:
- TI TLV320AIC23B, TLV320AIC3106
- Cirrus Logic WM8731, WM8960
- Analog Devices ADAU1761, ADAU1701
- AKM AK4556
Verify feature set, pinout and power/headphone specs before substituting.

NAU88L21YG is a low‑power stereo audio CODEC. Key features (concise):
- Dual-channel ADC and DAC (stereo) for analog-to-digital and digital-to-analog conversion
- 16- or 24-bit data path with support for standard audio formats
- Flexible digital interface: I2S, left-justified, PCM/DSP formats
- Analog front-end: microphone bias and mic preamplifier inputs
- Output stages: headphone driver and line-out with mute/de-pop control
- Digital processing basics: volume control, mute, de-emphasis, soft-pop, and routing options
- Power management: low-power operation with shutdown/power-down modes
- Clocking: supports common master/slave clocking (BCLK/LRCK)
- Suitable for portable/battery-powered devices due to compact, integrated design
For exact specifications and limitations (voltages, current, max sample rate, package), please refer to the NAU88L21YG datasheet.

NAU88L21YG is supplied in a 24-pin QFN package (24 pins). Function: it is a low‑power stereo audio codec/analog front end. Key pin roles include:
- Digital audio interface: MCLK (master clock), BCLK (bit clock), LRCLK/FS, SDIN (SDI), SDOUT (SDO)
- Control interface: I2C SDA and SCL
- Analog I/O: stereo DAC outputs (LOUT/ROUT), stereo ADC inputs or microphone inputs (MIC+/-), MICBIAS
- Power and ground: AVDD, DVDD/VDDIO and multiple GND pins
- Control/reset: RESET (or PDN/EN) and mode/config pins (e.g., MODE/SEL)
- Additional support pins: clock selection or PLL-related pins as required by device
For exact pin names, locations and electrical details, refer to the NAU88L21 datasheet and the NAU88L21YG pinout diagram.

Manufacturer: Nuvoton Technology Corporation (part number NAU88L21YG).
What kind of company: Nuvoton is a Taiwan-based fabless semiconductor company that designs and supplies integrated circuits—MCUs, microprocessors, audio codecs, SoCs and related ICs—for consumer, industrial, communications and IoT applications.

NAU88L21YG is a low-power stereo CODEC with integrated ADC/DAC, mic bias, line-in, headphone drive, and an I2S digital interface. Typical application areas:
- Portable/wireless audio devices (Bluetooth speakers, headsets, USB dongles)
- USB audio interfaces and docking stations
- Smart home/IoT devices with mic input and speaker output (voice assistants, doorbells)
- Cameras and camcorders for audio capture
- Conferencing equipment and speakerphones
- Embedded MCU projects needing a complete audio front-end (multi-channel mic arrays, wake-word systems)

The NAU88L21YG is supplied in a 24-pin QFN (quad-flat no-lead) package. Consult the device datasheet for exact dimensions, pinout, and recommended PCB footprint.