ST25R3916B Mini NFC Module is a compact ELECHOUSE 13.56 MHz NFC and HF RFID reader module based on the STMicroelectronics ST25R3916B reader IC. It keeps the core ST25R3916B module function set while moving to a much smaller 27 mm x 20 mm board with an external antenna interface.
The included antenna is a 52 mm x 5.5 mm ultra-slim NFC antenna with anti-metal shielding. This narrow antenna is designed for embedded products where normal NFC antenna space is not available. In ELECHOUSE testing, the bundled antenna can reach about 5 cm reading distance with a MIFARE S50 standard card.
The default antenna cable length is 10 cm. Other cable lengths are available by customization.
Multiple antenna sizes can be supported, and batch custom antenna dimensions are available for OEM/ODM embedded NFC projects.
Why choose this mini module?
- Only 27 mm x 20 mm module size for space-constrained embedded NFC designs.
- External antenna design, easier to fit into compact enclosures and non-standard product shapes.
- Bundled with a 52 mm x 5.5 mm anti-metal ultra-slim antenna.
- Based on the ST25R3916B reader IC and compatible with the ELECHOUSE ST25R3916 software ecosystem.
- Suitable for customized antenna projects and volume embedded device integration.
Key features
- Based on STMicroelectronics ST25R3916B.
- 13.56 MHz NFC and HF RFID operation.
- Supports ISO 14443A/B, ISO 15693, FeliCa, and NFC Forum tag types.
- Supports NFC-A and NFC-F card emulation at IC level.
- SPI by default, with I2C mode available after board configuration.
- Same software family as the ELECHOUSE ST25R3916 and ST25R3916B NFC modules.
Specifications
| Product name | ST25R3916B Mini NFC Module with Ultra-Slim External Antenna |
|---|---|
| Reader IC | STMicroelectronics ST25R3916B |
| Operating frequency | 13.56 MHz |
| Module size | 27 mm x 20 mm |
| Antenna | External antenna |
| Included antenna | 52 mm x 5.5 mm anti-metal ultra-slim antenna |
| Antenna cable length | 10 cm by default; other lengths require customization |
| Typical test card | MIFARE S50 standard card |
| Tested read distance | About 5 cm with the bundled antenna in ELECHOUSE testing |
| Host interface | SPI by default, I2C after board configuration |
| Supply input | 5V input to the module |
| Host logic level | 3.3V host logic recommended |
| Connector signals | IRQ, CS, SCLK/SCL, MOSI, MISO/SDA, 5V, GND |
| Package weight | 20 g |
Typical applications
- Space-limited embedded NFC readers.
- Compact access control devices.
- Handheld, wearable, panel-mounted, or enclosure-constrained NFC products.
- Custom embedded NFC terminals that need special antenna dimensions.
- MIFARE, DESFire, ISO 14443, ISO 15693, and FeliCa reader projects.
