MAX66140K-000AA+【PDF 1/21 页】IC RFID UID 64BIT TYPE B KEY FOB

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Sheet目录474

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ATION

EVALU

AVAILA

ABRIDGED DATA SHEET

Rev 1; 1/11

KIT

BLE

ISO 15693-Compliant Secure Memory

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)

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

Ordering Information

Access Control

eCash

Asset Tracking

PART

MAX66140E-000AA+

MAX66140K-000AA+

TEMP RANGE

-25°C to +50°C

PIN-PACKAGE

ISO Card

Key Fob

Mechanical Drawings appear at end of data sheet.

13.56MHz READER

TX_OUT

TRANSMITTER

+Denotes a lead(Pb)-free/RoHS-compliant package.

Typical Operating Circuit

MAGNETIC

COUPLING

MAX66140

IC LOAD

SWITCHED

RX_IN

ANTENNA

LOAD

________________________________________________________________ Maxim Integrated Products

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.

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