**MIFARE CARD S70 – 13.56MHZ MIFARE 4K – TRANSACTION CARD

13.56Mhz Mifare Cards
4K > Standard MF1 S70(4 Kbyte) EEPROM

The MIFARE S70 (4K) card is a contactless RFID smart card used for identification, access control, and transaction-based systems. It operates using 13.56 MHz high-frequency technology and does not require physical contact or a battery.

Key Specifications

• Chip Type: NXP MIFARE Classic S70
• Frequency: 13.56 MHz
• Memory Capacity: 4KB (4096 bytes)
• Standard: ISO/IEC 14443 Type A
• Reading Distance: Up to ±10 cm
• Data Transfer Speed: ~106 kbps
• Card Size: Standard credit card size (85.6 × 54 mm)
• Material: PVC (printable)

Security Features

• Unique card ID (UID) – cannot be duplicated easily
• Sector-based memory with individual access keys (A & B)
• Built-in encryption (CRYPTO1) for secure transactions
• Anti-collision feature (multiple cards can be read without interference)

Memory Structure

• 4KB memory divided into multiple sectors and blocks
• Each sector can be independently secured
• Supports:
  • Read / Write data
  • Value storage (e.g. balances, credits)

Common Applications

These cards are widely used for:

• Access control systems (doors, gates)
• Time & attendance / clocking systems
• Cashless payments / canteens
• Public transport cards
• Membership & loyalty cards
• Parking systems

Advantages

• Contactless (fast and convenient)
• Durable (no wear from swiping)
• Rewritable (can be reused multiple times)
• Can store more data than standard 1K cards (S50)
• Cost-effective for large deployments

Important Notes

• Requires a compatible 13.56MHz RFID reader
• Not compatible with 125kHz proximity systems