# PCM1774RGPR

**Texas Instruments** · ADCs/DACs - Special Purpose · QFN-20(4x4)

PCM1774RGPR from Texas Instruments, in a QFN-20(4x4). 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 | MODE | input | Two- or three-wire interface selection: LOW selects SPI, HIGH selects I2C. |
| 2 | MS/ADR | input | Mode control select for the three-wire/two-wire interface. |
| 3 | MD/SDA | bidirectional | Mode control data for the three-wire/two-wire interface (SDA in I2C mode). |
| 4 | MC/SCL | input | Mode control clock for the three-wire/two-wire interface (SCL in I2C mode). |
| 5 | DIN | input | Serial audio data input. |
| 6 | VIO | power_in | Power supply for digital I/O, 1.71 V to 3.6 V. |
| 7 | VDD | power_in | Power supply for digital core, 1.71 V to 3.6 V. |
| 8 | DGND | power_in | Digital ground. |
| 9 | SCKI | input | System clock input; supports common-audio clock frequencies from 12 MHz to 39.36 MHz (256 fS/384 fS). |
| 10 | BCK | bidirectional | Serial bit clock. |
| 11 | LRCK | bidirectional | Left and right channel clock. |
| 12 | PGND | power_in | Ground for the speaker power amplifier. |
| 13 | VPA | power_in | Power supply for the power amplifier, 2.4 V to 3.6 V. |
| 14 | HPOR/LOR | output | Headphone/line output for the L-channel, as labeled in Table 1. |
| 15 | HPOL/LOL | output | Headphone/line output for the R-channel, as labeled in Table 1. |
| 16 | VCOM | passive | Analog common voltage. |
| 17 | AGND | power_in | Ground for analog circuitry. |
| 18 | VCC | power_in | Analog power supply, 2.4 V to 3.6 V. |
| 19 | AIN1R | input | Analog input 1 for the R-channel. |
| 20 | AIN1L | input | Analog input 1 for the L-channel. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | QFN-20(4x4) |
| Category | Data Acquisition |
| Pins | 21 |

## CAD (KiCad official)

- Symbol: `PCM1774RGPR`
- Footprint: `Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm`
- 3D model: QFN-20(4x4) (KiCad packages3D, STEP)
- 3D model files: `pcm1774rgpr-etched.step` / `pcm1774rgpr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pcm1774rgpr.step` / `pcm1774rgpr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/pcm1774) (50 pp, sha256 `89cd3f8c7b01041e`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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](docs/pcm1774rgpr-datasheet.pdf)