General Description
   The MAX66040 combines 1024 bits of user EEPROM with secure hash algorithm (SHA-1) challenge-andresponse authentication (ISO/IEC 10118-3 SHA-1), a 64-bit unique identifier (UID), one 64-bit secret, and a 13.56MHz RF interface (ISO/IEC 14443 Type B, Parts 2- 4) in a single chip. The memory is organized as 16 blocks of 8 bytes plus three more blocks, one for the secret and two for data and control registers.  Except for the secret, each block has a user-readable write-cycle counter. 

FEATUREs
✦ Fully Compliant ISO/IEC 14443 (Parts 2-4) Type B
   Interface
✦ 13.56MHz ±7kHz Carrier Frequency
✦ 1024-Bit Secure User EEPROM with Block Lock
   Feature, Write-Cycle Counter, and Optional
   EPROM-Emulation Mode
✦ 64-Bit UID
✦ 512-Bit SHA-1 Engine to Compute 160-Bit MAC
   and to Generate Secrets
✦ Mutual Authentication: Data Read from Device is
   Verified and Authenticated by the Host with
   Knowledge of the 64-Bit Secret
✦ Read and Write (64-Bit Block)
✦ Supports AFI and CID Function
✦ 10ms Maximum Programming Time
✦ Write: 10% ASK Modulation at 105.9kbps,
   211.9kbps, 423.75kbps, or 847.5kbps
✦ Read: Load Modulation Using BPSK Modulated
   Subcarrier at 105.9kbps, 211.9kbps, 423.75kbps,
   or 847.5kbps
✦ 200,000 Write/Erase Cycles (Minimum)
✦ 40-Year Data Retention (Minimum)

APPLICATIONs
   Driver Identification (Fleet Application)
   Access Control
   e-Cash
   Asset Tracking