Rainbow Electronics MAX66140 - Manual

General Description
The MAX66140 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 ISO 15693 RF interface 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 guaran-
tee secure, symmetric authentication 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. The MAX66140 supports all ISO 15693-
defined data rates, modulation indices, subcarrier
modes, the selected state, application family identifier
(AFI), data storage format identifier (DSFID), and the
Option_flag bit for read operations. Memory write
access (except for AFI, DSFID, and the corresponding
lock bytes) is accomplished through custom com-
mands using a write buffer with readback and copy-to-
memory function.
Applications
Driver Identification (Fleet Application)
Access Control
eCash
Asset Tracking
Features
♦ Fully Compliant with ISO 15693 and ISO 18000-3
Mode 1 Standard
♦ 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 DSFID Function
♦ 10ms Programming Time
♦ Write: 10% or 100% ASK Modulation Using 1/4
(26kbps) or 1/256 (1.6kbps) Pulse Position Coding
♦ Read: Load Modulation Using Manchester Coding
with 423kHz and 484kHz Subcarrier in Low
(6.6kbps) or High (26kbps) Data-Rate Mode
♦ 200,000 Write/Erase Cycles (Minimum)
♦ 40-Year Data Retention (Minimum)
♦ Read Compatible with Existing 1Kb ISO 15693
Products on the Market
MAX66140
ISO 15693-Compliant Secure Memory
________________________________________________________________ Maxim Integrated Products 1
IC LOAD
SWITCHED
LOAD
MAGNETIC
COUPLING
ANTENNA RX_IN
TX_OUT
TRANSMITTER
13.56MHz READER
MAX66140
Typical Operating Circuit
Rev 1; 1/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
ABRIDGED DATA SHEET
Mechanical Drawings appear at end of data sheet.
EVALUATION KIT
AVAILABLE
Ordering Information
+ Denotes a lead(Pb)-free/RoHS-compliant package.
PART TEMP RANGE PIN-PACKAGE
MAX66140E-000AA+ -25°C to +50°C ISO Card
MAX66140K-000AA+ -25°C to +50°C Key Fob