SpringSeed M519
High-end, versatile OEM RFID/NFC module, available in three configurations to match your integration needs.
SpringSeed M519 is a 13.56 MHz RFID/NFC reader module designed to be integrated directly into your machines and equipment. Three antenna configurations (external, remote or integrated) let you adapt the module to your housing, without ever having to redesign your product.
Three ways to integrate SpringSeed M519
M519
Compact OEM RFID/NFC HF module, designed to be integrated with an external antenna. Compatible with contactless cards, NFC tags and smartphones (Apple/Google Wallet).
M519-SUV
Coupler module with integrated antenna, USB and serial interfaces, for fast and secure transactions (AES/ECC).
M519-SAM
Available in two versions: SAM(B) (symmetric remote antenna) and SAM(U) (asymmetric remote antenna), both with an integrated SAM slot for enhanced hardware security.

From prototype to volume production, same form factor
Same module, from the first lab trial through to production volumes. No redesign needed as you scale up.

A kit to get started in an afternoon
SDK, code samples and a development kit to validate your integration quickly — then our engineering office takes over for custom work.
Every specification, side by side
| Specification | M519 | M519-SUV | M519-SAM |
|---|---|---|---|
| Frequency | 13.56 MHz (HF RFID, NFC), NXP PN5190 chip | 13.56 MHz (HF RFID, NFC), NXP PN5190 chip | 13.56 MHz (HF RFID, NFC), NXP PN5190 chip |
| RF standards | ISO/IEC 14443 A & B (NFC-A, NFC-B), ISO/IEC 15693 (NFC-V), ISO/IEC 18000-3M1 & 3M3, ISO/IEC 18092 (NFCIP-1) | ISO/IEC 14443 A & B (NFC-A, NFC-B), ISO/IEC 15693 (NFC-V), ISO/IEC 18000-3M1 & 3M3, ISO/IEC 18092 (NFCIP-1) | ISO/IEC 14443 A & B (NFC-A, NFC-B), ISO/IEC 15693 (NFC-V), ISO/IEC 18000-3M1 & 3M3, ISO/IEC 18092 (NFCIP-1) |
| Antenna | external, not supplied | integrated, symmetric, 7 cm diameter (0-10 cm range depending on card/antenna) | remote (symmetric SAM(B) / asymmetric SAM(U)) |
| Interface | serial or USB coupler | USB PC/SC (CCID), RS232/RS485/TTL serial | USB PC/SC (CCID), identical between SAM(B) and SAM(U) |
| Modes | PC/SC coupler, SpringProx Legacy | PC/SC coupler, ISO/IEC 14443 A card emulation, ISO/IEC 18092 peer-to-peer | PC/SC coupler, ISO/IEC 14443 A card emulation, ISO/IEC 18092 peer-to-peer |
| Security | - | AES/ECC, secure key storage, Microchip ATECC secure component | integrated SAM slot (NXP TDA8035, ISO/IEC 7816-2 & -3, T=0/T=1) |