# XDS901

**XDS** · Other Processors and Microcontrollers (MCUs) · SOP-16

XDS901 from XDS, in a SOP-16. 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 | VDD | power_in | Positive supply; the solution is powered from two AAA cells at 2.5V~3V. |
| 2 | PB4 | bidirectional | General-purpose I/O PB4 with alternate functions TIM1_BKIN and [LVDOUT]. |
| 3 | PB3 | bidirectional | General-purpose I/O PB3 with alternate functions TIM1_ETR, [ADC_ETR] and [LVDOUT]. |
| 4 | PB2 | bidirectional | General-purpose I/O PB2 with alternate functions TIM1_CH3 and [TIM1_CH1N]. |
| 5 | PB1 | bidirectional | General-purpose I/O PB1 with alternate functions AN0 (ADC input), CLKO, TIM1_CH4 and TIM1_CH2N. |
| 6 | PB0 | bidirectional | General-purpose I/O PB0 with alternate functions TIM1_CH3N, [TIM2_CH1] and [TIM2_CH2]. |
| 7 | PA0 | bidirectional | General-purpose I/O PA0 with alternate functions VREFN and TIM1_CH1. |
| 8 | PA1 | bidirectional | General-purpose I/O PA1 with alternate functions VREFP and TIM1_CH2. |
| 9 | PA4 | bidirectional | General-purpose I/O PA4 with alternate functions TIM2_CH2, ADC_ETR and AN2 (ADC input). |
| 10 | PB6 | bidirectional | General-purpose I/O PB6 with alternate functions UART_TX, ISPDAT (programming data) and AN6 (ADC input). |
| 11 | PA2 | bidirectional | General-purpose I/O PA2 with alternate functions [TIM1_CH4], ISPCK (programming clock) and [UART_RX]. |
| 12 | PA6 | bidirectional | General-purpose I/O PA6 with alternate functions UART_TX and AN3 (ADC input). |
| 13 | PA7 | bidirectional | General-purpose I/O PA7 with alternate functions [CLKO], [TIM1_CH4], UART_RX, ELVD0, [AT0] and AN4 (ADC input). |
| 14 | PC1 | bidirectional | General-purpose I/O PC1 with alternate functions OSC1 (oscillator) and ELVD2. |
| 15 | PB7 | bidirectional | General-purpose I/O PB7 with alternate functions OSC2 (oscillator) and ELVD3. |
| 16 | GND | power_in | Ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XDS |
| Package | SOP-16 |
| Category | Embedded Processors & Controllers |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `XDS901`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files: `xds901-etched.step` / `xds901-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `xds901.step` / `xds901.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XDS datasheet](docs/xds901-datasheet.pdf) (7 pp, sha256 `da3f7e1f776ed58a`, retrieved 2026-10-23, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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](docs/xds901-datasheet.pdf)