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Analog Devices Inc./Maxim Integrated MAX66140K-000AA+
- Part No.:
- MAX66140K-000AA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- RFID Transponders, Tags
- Package:
- Datasheet:
-
MAX66140K-000AA+.pdf
- Description:
- RFID TAG R/W 13.56MHZ KEY FOB
- Quantity:
- Payment:
- Shipping:
Inventory:3,399
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Product details
Overview
The MAX66140K-000AA+ from Maxim Integrated is an ISO 15693-compliant secure memory IC integrating 1024-bit user EEPROM, 64-bit UID, 64-bit secret, 512-bit SHA-1 engine, and 13.56MHz RF interface in a key fob package. It supports mutual authentication via MAC generation, per-page write protection, EPROM-emulation mode, and read protection on Page 3 - deployed in fleet driver identification, access control, and eCash systems.
For engineers reviewing the MAX66140K-000AA+ datasheet, MAX66140K-000AA+ pinout, MAX66140K-000AA+ application, or MAX66140K-000AA+ equivalent, key selection considerations include ISO 15693 subcarrier/data-rate flexibility (423kHz/484kHz, 6.6kbps/26kbps), 200,000 write/erase cycles, 40-year data retention, parasite power operation, and AFI/DSFID programmability for system-level interoperability.
Technical Context
The MAX66140K-000AA+ implements a full ISO 15693 Mode 1 transponder architecture with dual-subcarrier uplink (423.75kHz/484.28kHz) and ASK downlink using 1/4 or 1/256 pulse-position coding. Its SHA-1 engine computes 160-bit MACs over EEPROM content and the 64-bit secret to enable symmetric challenge-response authentication.
Memory organization comprises 19 × 8-byte blocks: 16 user EEPROM blocks (grouped into four 256-bit pages), one 64-bit secret block, and two 8-byte register blocks. Each user block includes a write-cycle counter; page-level lock bits and optional EPROM-emulation mode provide granular protection for Pages 0–3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Interface Standard | Fully compliant with ISO 15693 and ISO 18000-3 Mode 1 - ensures interoperability with commercial readers and legacy 1kb ISO 15693 infrastructure. |
| Carrier Frequency | 13.560 MHz ±7 kHz - meets global HF RFID regulatory requirements and enables reliable coupling in key fob form factor. |
| User Memory | 1024-bit EEPROM (16 × 8-byte blocks), organized as four 256-bit pages - supports secure storage of credentials, keys, and configuration data with per-page lock control. |
| Authentication Engine | 512-bit SHA-1 hardware accelerator generating 160-bit MAC - enables fast, deterministic, tamper-resistant challenge-response verification without host CPU overhead. |
| Write Endurance | 200,000 write/erase cycles minimum at +25°C - guarantees long-term reliability in high-frequency credential update scenarios like fleet vehicle reassignment. |
| Data Retention | 40 years minimum - ensures persistent storage of cryptographic secrets and identifiers across product lifecycle in unpowered key fob applications. |
| Operating Temperature | -25°C to +50°C - validated for automotive cabin and outdoor access control environments where key fobs experience thermal cycling. |
Pinout & Package
MAX66140K-000AA+ is housed in a Key Fob package - a fully integrated, antenna-coupled RF transponder module with no external pins or terminals. Power is harvested parasitically from the 13.56MHz magnetic field; communication occurs wirelessly via internal coil antenna. No PCB-level pin assignment applies.
Key Features
| Feature | Design Value |
|---|---|
| ISO 15693 Full Protocol Stack | Supports all mandatory commands (Inventory, Select, Stay Quiet, Reset to Ready), AFI/DSFID, Option_flag, and both subcarrier/data-rate modes - eliminates need for external protocol translation logic. |
| Secure Authentication Architecture | Hardware SHA-1 engine + 64-bit secret + UID enables mutual authentication where host verifies device-read data integrity using shared secret - prevents cloning and replay attacks. |
| Memory Protection Granularity | Per-page write lock and optional EPROM-emulation mode for Pages 0–2; Page 3 adds read protection - allows differentiated security policies for public vs. private credential zones. |
| Parasitic Power Operation | No battery or external supply required - derives operating energy solely from reader's RF field (HMIN = 122.0 dBµA/m at +25°C) - enables maintenance-free, ultra-thin key fob designs. |
| Write Cycle Monitoring | User-readable write-cycle counter in each EEPROM block - enables firmware-level wear leveling and lifetime diagnostics without additional nonvolatile storage. |
Applications
| Driver Identification (Fleet) | Access Control |
|---|---|
Use Scenario: Fleet management system authenticates drivers before vehicle ignition using encrypted credentials stored on key fobs. IC Role / Device Role / Timing Role: Secure transponder providing cryptographically verified identity via ISO 15693 RF link; performs SHA-1 MAC generation on demand during challenge-response handshake. Use Value: Prevents unauthorized vehicle use by ensuring only enrolled drivers with valid, uncloned credentials can initiate operation - enforced through hardware-bound secret and per-page memory locking. |
Use Scenario: Office building entry system validates employee badges at door readers to grant physical access. IC Role / Device Role / Timing Role: ISO 15693-compliant secure memory storing AFI-tagged credentials and DSFID-configured data format; responds within 1.0ms power-up time to reader inventory commands. Use Value: Enables rapid, standards-based authentication while protecting stored credentials via write-lockable pages and 40-year data retention - eliminating need for periodic badge replacement. |
| eCash Transaction | Asset Tracking |
Use Scenario: Contactless payment token stores encrypted balance and transaction history on disposable or reusable tokens. IC Role / Device Role / Timing Role: Secure EEPROM with SHA-1 engine performing MAC-based balance validation during top-up or debit operations; supports 10ms programming time for fast updates. Use Value: Ensures financial integrity by binding balance data to device-specific secret - preventing tampering or value inflation without host-side cryptographic verification. |
Use Scenario: High-value equipment tagged with key fobs for real-time location tracking and maintenance logging in industrial facilities. IC Role / Device Role / Timing Role: Tamper-resistant identifier with 64-bit UID and programmable DSFID; retains asset history in protected EEPROM pages across decades of operation. Use Value: Provides immutable, long-life asset identity and usage records - supported by 200,000 write cycles and water-resistant operation suitable for harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure RFID transponder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP ICODE SLI-S | 1024-bit EEPROM, ISO 15693-compliant, no integrated SHA-1 engine or secret storage - relies on host-side cryptography. | Lacks hardware-accelerated mutual authentication; requires external secure element for equivalent security level. | Select when cost-sensitive deployments prioritize basic read/write functionality over embedded cryptographic assurance. |
| STMicroelectronics ST25DV04KC | 4-Kbit EEPROM, ISO 15693/14443B dual-interface, integrated EEPROM lock bits but no SHA-1 engine or UID-based authentication logic. | Supports NFC reader compatibility and larger memory, but no native challenge-response capability - authentication must be implemented externally. | Prefer for hybrid NFC/HF-RFID systems needing >1kb memory and dual-standard support, accepting added host software complexity for security. |
Compared with NXP ICODE SLI-S and ST25DV04KC, the MAX66140K-000AA+ uniquely integrates SHA-1, UID, and secret in a single die - delivering true embedded mutual authentication without host dependency, making it optimal for resource-constrained, high-security key fob applications where cryptographic offload and tamper resistance are critical.
Availability
MAX66140K-000AA+ is available at Aetrix Electronics and suitable for fleet driver identification, physical access control, eCash tokenization, and industrial asset tracking requiring stable component supply and long-lifecycle support.
Supply support for MAX66140K-000AA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and secure ICs for demanding industrial, automotive, and computing applications.
The MAX66140 product line delivers ISO 15693-compliant secure transponders with embedded cryptographic engines - engineered specifically for trusted identity, anti-counterfeiting, and contactless payment systems requiring hardware-enforced security.
FAQ
What is the operating temperature range for the MAX66140K-000AA+?
The MAX66140K-000AA+ is rated for operation from -25°C to +50°C, validated for use in automotive key fobs and outdoor access control badges. This range ensures reliable RF coupling, EEPROM retention, and SHA-1 computation under real-world environmental stress - consistent with its Key Fob packaging and parasitic power architecture.
Does the MAX66140K-000AA+ require an external power source?
No, the MAX66140K-000AA+ operates exclusively on parasitic power harvested from the 13.56MHz RF field. It requires no battery or PCB-level power connection. Its activation field strength is specified at 122.0 dBµA/m (at +25°C), enabling robust operation in compact key fob antennas with minimal reader field strength.
How does the MAX66140K-000AA+ implement secure authentication?
The MAX66140K-000AA+ uses its integrated 512-bit SHA-1 engine to compute a 160-bit Message Authentication Code (MAC) over selected EEPROM data and its factory-programmed 64-bit secret. This enables mutual challenge-response authentication - the host verifies device-read data integrity without exposing the secret, preventing cloning and replay attacks.
What memory protection features does the MAX66140K-000AA+ support?
The MAX66140K-000AA+ supports per-page write protection, EPROM-emulation mode (for permanent lock), and optional read protection on Page 3. Each of the four 256-bit EEPROM pages (0–3) has independent lock bits. Page 3's read protection enhances authentication strength by securing the most sensitive credential data from unauthorized reads.
Is the MAX66140K-000AA+ compatible with existing ISO 15693 readers?
Yes, the MAX66140K-000AA+ is fully compliant with ISO 15693 and ISO 18000-3 Mode 1 standards. It supports all defined data rates (6.6kbps/26kbps), subcarrier modes (423kHz/484kHz), modulation indices (10%/100% ASK), and command sets - ensuring seamless interoperability with legacy and current-generation ISO 15693 infrastructure.
MAX66140K-000AA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- iButton®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Style:
- Key Fob
- Technology:
- Passive
- Frequency:
- 13.56MHz
- Memory Type:
- Read/Write
- Writable Memory:
- 1kB (User)
- Standards:
- ISO 15693, ISO 18000-3
- Operating Temperature:
- -25°C ~ 50°C
- Size / Dimension:
- 3.370" L x 2.125" W (85.60mm x 53.98mm)
MAX66140K-000AA+ FAQ
1.How can I place an order for MAX66140K-000AA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX66140K-000AA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX66140K-000AA+ reliable?
The price and inventory of MAX66140K-000AA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX66140K-000AA+ is usually 5 days.
3.What payment methods are accepted for MAX66140K-000AA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX66140K-000AA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX66140K-000AA+?
MAX66140K-000AA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX66140K-000AA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX66140K-000AA+?
For technical support, including MAX66140K-000AA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX66140K-000AA+ requirements.
6.How does Aetrix verify that MAX66140K-000AA+ is sourced from the original manufacturer or authorized distributors?
All MAX66140K-000AA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX66140K-000AA+ meets industry standards.
7.What is the process for return or replacement of MAX66140K-000AA+?
All MAX66140K-000AA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX66140K-000AA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX66140K-000AA+ part is unused and in its original packaging.
Return procedure for MAX66140K-000AA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX66140K-000AA+ Tags
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SL3S1013FTB0,115
NXP Semiconductors
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NTP53321G0JHKZ
NXP Semiconductors
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HTSH4801ETK,118
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NTA53321G0FHKZ
NXP Semiconductors
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RF-HDT-DVBE-N2
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RF-HDT-DVBB-N2
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HT2DC20S20/F/RSP
NXP Semiconductors
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TRPGR30ATGA
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TRPGR30ATGC
Texas Instruments
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RI-TRP-DR2B-40
Texas Instruments
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V680-D1KP52MT
Omron Automation and Safety
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HTMS8001FTB/AF,115
NXP USA Inc.
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