Technical data Smart cards
September 3, 2025 at 3:09 AMContact smart cards (ISO7816) interface(s)
SpringCore devices that features one or more contact smart card interfaces supports ISO/IEC 7816-3 classes A, B and C (5V, 3V and 1.8V) and both T=0 and T=1 protocols.
Technical specifications
Key specifications
| Data | Value |
|---|---|
| Standard | ISO/IEC 7816 Coupling Device (CD) Designed for compliance with EMV contact L1 Digital specification1 |
| Protocols | T=0 and T=1 |
| Card Vcc | 5V, 3.3V or 1.8V (classes A, B and C) |
| Card Clock | 4MHz, not changeable |
| Supported bitrates | TA1=11 (10753bps) TA1=12 (21505bps) TA1=13 (43011bps) TA1=14 (86022bps) TA1=15 (172043bps) TA1=95 (125000bps) TA1=96 (250000bps) |
1 the products are “designed for” buy NOT certified.
Slots
The number and physical format of the smart card slots depends on the device.
Slots can either be
- ID-1 (ISO/IEC 7810 “standard” smart card format)
- ID-000 a.k.a. mini-SIM or 2FF.
Implementation details
The card’s ATR gives two important informations to the reader:
- The max. frequency and bitrate supported by the card (ATR byte TA1). The reader will not switch frequency: SpringCore devices operate contact cards at 4.0MHz only, but it will try to use the highest bitrate supported by the card,
- Whether the card supports only the T=0 protocol, or only the T=1 protocol, or both, and whether the card is in negociable mode or a particular mode is implicitely selected.
The SpringCore device automatically activates the card with the “best” bitrate and protocol through a PPS procedure.