# AS3933-BTST

**AMS** · RFID ICs · TSSOP-16

AS3933-BTST from AMS, in a TSSOP-16. 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 | CS | input | Chip select digital input for SPI interface control. |
| 2 | SCL | input | Serial clock input for SDI interface. |
| 3 | SDI | input | Serial data input for SPI configuration. |
| 4 | SDO | tri_state | Serial data output with tri-state control (tri-state when CS is low). |
| 5 | VCC | power_in | Positive supply voltage, operating range 2.4V to 3.6V. |
| 6 | GND | power_in | Ground, negative supply voltage reference. |
| 7 | LF3P | input | Input antenna channel three for low frequency reception in carrier frequency range 15-150kHz. |
| 8 | LF2P | input | Input antenna channel two for low frequency reception in carrier frequency range 15-150kHz. |
| 9 | LF1P | input | Input antenna channel one for low frequency reception in carrier frequency range 15-150kHz. |
| 10 | LFN | power_in | Common ground reference for antenna channels one, two, and three. |
| 11 | XIN | input | Crystal oscillator input (32.768kHz typical) or connected to VCC for external clock mode. |
| 12 | XOUT | bidirectional | Crystal oscillator output (32.768kHz typical) or external clock signal input depending on configuration mode. |
| 13 | VSS | power_in | Substrate supply pad, electrical ground reference. |
| 14 | WAKE | output | Wake-up output IRQ signal, goes high when programmed wake-up pattern is detected. |
| 15 | DAT | output | Demodulated data output or Manchester decoded data from receiver. |
| 16 | CL_DAT | output | Manchester recovered clock output for synchronization of data on DAT pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | AMS |
| Package | TSSOP-16 |
| Category | RF And Wireless |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `AS3933-BTST`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `as3933-btst-etched.step` / `as3933-btst-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `as3933-btst.step` / `as3933-btst.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [AMS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881461328433152) (63 pp, sha256 `0c5a2627ce94fc27`, retrieved 2026-09-21, 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](docs/as3933-btst-datasheet.pdf)