MAX66040 Datasheet, PDF (1/25 Pages) Maxim Integrated Products – ISO/IEC 14443 Type B-Compliant Secure Memory Supports AFI and CID Function

ABRIDGED DATA SHEET
219-0012; Rev 0; 1/11
EVAALVUAAILTAIOBNLEKIT
ISO/IEC 14443 Type B-Compliant
Secure Memory
General Description
The MAX66040 combines 1024 bits of user EEPROM
with secure hash algorithm (SHA-1) challenge-and-
response 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. Four adjacent user EEPROM blocks form a
memory page (pages 0 to 3). The integrated SHA-1
engine provides a message authentication code (MAC)
using data from the EEPROM of the device and the 64-
bit secret to guarantee secure, symmetric authentica-
tion for both reading and writing to the device. Memory
protection features are write protection and EPROM
emulation, which the user can set for each individual
memory page. Page 3 can also be read-protected for
enhanced authentication strength. Memory access is
accomplished through the block transmission protocol
(ISO/IEC 14443-4), where requests and responses are
exchanged through I-blocks once a device is in the
ACTIVE state. The data rate can be as high as
847.5kbps. The reader must support a frame size of 26
bytes. The device supports an application family identi-
fier (AFI) and a card identifier (CID). ISO/IEC 14443
functions not supported are chaining, frame-waiting
time extension, and power indication.
Applications
Driver Identification (Fleet Application)
Access Control
e-Cash
Asset Tracking
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)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX66040E-000AA+ -25°C to +50°C ISO Card
MAX66040K-000AA+ -25°C to +50°C Key Fob
+Denotes a lead(Pb)-free/RoHS-compliant package.
Mechanical Drawings appear at end of data sheet.
Typical Operating Circuit
13.56MHz READER
TRANSMITTER
TX_OUT
RX_IN
MAGNETIC
COUPLING
ANTENNA
MAX66040
IC LOAD
SWITCHED
LOAD
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