Description
This Writable (Fixed UID) 13.56MHz RFID card is embedded with the MIFARE S70 chip, offering stable and reliable contactless performance based on ISO/IEC 14443A standards. Designed for secure access, data storage, and identification applications, the S70 card features a large 4KB EEPROM memory divided into 40 sectors, making it suitable for multi-application environments such as schools, universities, banks, parking, transport, offices and building access systems.
The card comes with a fixed 4-byte UID for consistent identification, while the memory blocks and card number are fully writeable, allowing flexible integration with a wide range of RFID systems. The S70 chip supports sector-level security and block-wise data control, making it ideal for advanced access control, library systems, prepaid solutions, and more.
HF Chip – MIFARE S70 4K:
- MIFARE S70 4K Memory, ISO 14443A
Physical Specs:
- Card size: CR80 (85.6 × 54 mm)
- Material: PVC or PET
- Printable surface (optional for card printers)
| Feature Category |
Specification |
| Chip Type |
MIFARE S70 (Compatible) |
| Frequency |
13.56 MHz |
| Protocol Standard |
ISO/IEC 14443A |
| Memory Size |
4KB EEPROM (32-bit × 1024 = 4096 bytes) |
| Memory Structure |
40 sectors × 4 blocks per sector |
| UID (Unique Identifier) |
4-byte Fixed UID (non-writable) |
| Card Number Writable |
Yes – card/application number can be written into memory blocks |
| User Data Writable |
Yes – all 4K memory is writable (except sector 0, block 0) |
| Security Features |
Each sector protected with two keys (A/B) and access conditions |
| Card Material |
PVC |
| Surface Finish |
Glossy |
| Print Compatibility |
Offset printing, UV printing |
| Card Size |
CR80 standard (85.6 × 54 × 0.84 mm) |
| Operating Temperature |
-20°C to +55°C |
| Storage Temperature |
-40°C to +65°C |
| Typical Applications |
Access control, prepaid cards, parking, campus ID, loyalty programs |
