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Analog Devices Inc./Maxim Integrated MAX66040K-000AA+
- Part No.:
- MAX66040K-000AA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- RFID Transponders, Tags
- Package:
- Datasheet:
-
MAX66040K-000AA+.pdf
- Description:
- RFID TAG R/W 13.56MHZ CARD
- Quantity:
- Payment:
- Shipping:
Inventory:4,295
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Product details
Overview
MAX66040K-000AA+ from Maxim Integrated is an ISO/IEC 14443 Type B-compliant secure memory IC in key fob form factor, integrating 1024-bit user EEPROM, 64-bit UID, 64-bit secret, and a 512-bit SHA-1 engine for symmetric challenge-response authentication. It operates at 13.56 MHz ±7 kHz, supports up to 847.5 kbps data rate, and delivers 200,000 write/erase cycles with 40-year data retention - deployed in fleet driver identification and physical access control systems.
For engineers reviewing the MAX66040K-000AA+ datasheet, MAX66040K-000AA+ pinout, MAX66040K-000AA+ application, or MAX66040K-000AA+ equivalent, key selection considerations include its ISO/IEC 14443-4 block transmission protocol compliance, parasitic power operation, AFI/CID support, read/write protection per memory page, and SHA-1–based MAC generation using on-chip secret and EEPROM data.
Technical Context
The MAX66040K-000AA+ implements a full ISO/IEC 14443-4 Type B stack including REQB/WUPB/ATTRIB network functions, I-block–based memory access, and R-block error handling - all operating without external power via magnetic coupling at 13.56 MHz. Its RF front-end supports 8–14% ASK downlink modulation and BPSK load-modulated uplink at 847.5 kHz subcarrier.
Authentication relies on deterministic SHA-1 computation over variable-length EEPROM data and the immutable 64-bit secret, producing a 160-bit MAC verified by host readers. Memory is partitioned into 19 × 8-byte blocks (16 user EEPROM + 2 register + 1 secret), organized as four 256-bit pages with independent write- and optional read-protection (Page 3 only).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Standard | ISO/IEC 14443 Type B Parts 2–4 compliant; no chaining, no frame-waiting extension, no power indication |
| Carrier Frequency | 13.553–13.567 MHz at +25°C; enables interoperability with standard 13.56 MHz readers |
| Data Rate | Up to 847.5 kbps; requires reader frame size ≥26 bytes for full-speed operation |
| Memory Capacity | 1024-bit user EEPROM (16 blocks × 8 bytes) + 64-bit UID + 64-bit secret + 128-bit registers |
| SHA-1 Engine | 512-bit hardware accelerator computing 160-bit MAC for mutual authentication of read/write operations |
| Endurance & Retention | ≥200,000 write/erase cycles and ≥40 years data retention at -25°C to +50°C |
| Operating Temp | -25°C to +50°C; validated for key fob deployment in automotive and industrial environments |
Pinout & Package
MAX66040K-000AA+ is a monolithic RFID IC housed in a key fob package with no external pins or terminals - power and communication occur entirely via magnetic coupling through an integrated antenna coil. The device has no user-accessible electrical interface; all signals (RX_IN/TX_OUT) are internal to the RF front-end and not brought out to package leads.
Key Features
| Feature | Design Value |
|---|---|
| Secure Authentication | Hardware SHA-1 engine computes message authentication code (MAC) using EEPROM content and 64-bit secret - prevents cloning and unauthorized writes |
| Memory Protection | Per-page write lock and EPROM-emulation mode; Page 3 supports optional read protection to strengthen authentication integrity |
| UID & Identification | Factory-programmed 64-bit UID with ISO/IEC 7816-6-compliant manufacturer code (2Bh) and serial number - enables unique device tracking and AFI/CID-based routing |
| Parasitic Power Operation | No battery or external supply required; draws energy directly from 13.56 MHz RF field - enables maintenance-free key fob integration |
| Protocol Compliance | Fully implements ISO/IEC 14443-4 block transmission protocol (I/R/S-blocks) with CID support and strict timing adherence (e.g., 10 ms max programming time) |
Applications
| Driver Identification (Fleet Application) | Access Control |
|---|---|
Use Scenario: Fleet management system verifies authorized drivers before vehicle ignition or fuel dispensing. IC Role / Device Role / Timing Role: Secure memory IC storing driver credentials and enabling SHA-1–based mutual authentication with fleet reader. Use Value: Prevents credential cloning via hardware-bound secret and one-time MAC; UID ensures tamper-evident driver traceability across vehicles. | Use Scenario: Office building entry system grants access only after validating employee badge against central database. IC Role / Device Role / Timing Role: ISO/IEC 14443 Type B slave providing cryptographically authenticated identity and access tier data. Use Value: Enables offline authentication at door readers using locally stored secret; write-cycle counters detect unauthorized reprogramming attempts. |
| e-Cash | Asset Tracking |
Use Scenario: Contactless payment terminal deducts funds from preloaded value stored on transit card. IC Role / Device Role / Timing Role: Secure EEPROM storing encrypted balance and transaction logs, protected by SHA-1 MAC during value updates. Use Value: Ensures transaction atomicity and prevents balance inflation via hardware-enforced write protection and block-level counters. | Use Scenario: Logistics hub scans high-value equipment tags to log location, maintenance history, and custody chain. IC Role / Device Role / Timing Role: Tamper-resistant memory IC holding asset ID, calibration data, and service timestamps authenticated via UID + SHA-1. Use Value: Provides cryptographically verifiable audit trail; 40-year data retention guarantees long-term traceability without battery dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure RFID memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SLI13S (NXP Semiconductors) | ISO/IEC 14443 Type A compliant; 1024-bit EEPROM; no integrated SHA-1 engine - relies on host-side crypto | Lacks on-chip authentication; requires reader to perform MAC generation - less secure against relay attacks | Select when cost-sensitive Type A infrastructure exists and host-side crypto is acceptable |
| DS1961S (Maxim Integrated) | 1-Wire interface; 1024-bit EEPROM; integrated SHA-1; no RF interface - requires wired connection | Not contactless; used in tamper-evident iButton applications, not key fobs or cards | Select for ruggedized, direct-contact secure memory where RF is impractical or prohibited |
Compared with SLI13S and DS1961S, the MAX66040K-000AA+ uniquely combines ISO/IEC 14443 Type B RF compatibility, on-die SHA-1 authentication, and key fob packaging - delivering standalone, battery-free, cryptographically verified identity in a single monolithic IC.
Availability
MAX66040K-000AA+ is available at Aetrix Electronics and suitable for fleet driver identification, physical access control, e-cash terminals, and asset tracking systems requiring stable component supply and long-lifecycle support.
Supply support for MAX66040K-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 industrial, automotive, and communications applications.
The MAX66040 product line delivers contactless, cryptographically secure memory for ISO/IEC 14443 Type B systems - engineered specifically for tamper-resistant identity and transaction integrity in key fob, card, and tag formats.
FAQ
What is the operating temperature range for MAX66040K-000AA+?
The MAX66040K-000AA+ is rated for operation from -25°C to +50°C, matching its key fob mechanical form factor and intended use in automotive cabin and indoor access environments. This range is validated per the device's absolute maximum ratings and electrical characteristics table, with full functionality including SHA-1 computation, EEPROM programming, and RF communication guaranteed across the span.
Does MAX66040K-000AA+ require an external power source?
No, the MAX66040K-000AA+ operates exclusively via parasitic power harvested from the 13.56 MHz RF field - it has no VCC pin or battery requirement. Its internal voltage regulator and RF front-end are designed to function within the specified incident magnetic field strength (123.5–137.5 dBµA/m for MAX66040K), making it ideal for maintenance-free key fob deployment.
How does MAX66040K-000AA+ implement secure authentication?
The MAX66040K-000AA+ uses its integrated 512-bit SHA-1 engine to compute a 160-bit message authentication code (MAC) over selected EEPROM data and its immutable 64-bit secret. This MAC is verified by the host reader during both read and write operations - ensuring mutual authentication without exposing the secret, and preventing replay or cloning attacks.
What memory protection mechanisms does MAX66040K-000AA+ support?
The MAX66040K-000AA+ supports per-page write protection, EPROM-emulation mode (preventing accidental erasure), and optional read protection on Page 3. Each of the 16 user EEPROM blocks includes a user-readable write-cycle counter. These features are configured via control registers and enforced in hardware - no software or firmware intervention is required to maintain integrity.
Is MAX66040K-000AA+ pin-compatible with other MAX66040 variants like MAX66040E-000AA+?
No - MAX66040K-000AA+ (key fob) and MAX66040E-000AA+ (ISO card) share identical silicon die and electrical specifications but differ in mechanical packaging and antenna integration. Neither variant has external pins; both rely on magnetic coupling. PCB layout, antenna design, and mechanical mounting must be tailored to each form factor - they are not drop-in replacements.
MAX66040K-000AA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- iButton®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Style:
- Card
- Technology:
- Passive
- Frequency:
- 13.56MHz
- Memory Type:
- Read/Write
- Writable Memory:
- 1kB (User)
- Standards:
- ISO 14443
- Operating Temperature:
- -25°C ~ 50°C
- Size / Dimension:
- 2.126" L x 1.102" W (54.00mm x 28.00mm)
MAX66040K-000AA+ FAQ
1.How can I place an order for MAX66040K-000AA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX66040K-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 MAX66040K-000AA+ reliable?
The price and inventory of MAX66040K-000AA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX66040K-000AA+ is usually 5 days.
3.What payment methods are accepted for MAX66040K-000AA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX66040K-000AA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX66040K-000AA+?
MAX66040K-000AA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX66040K-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 MAX66040K-000AA+?
For technical support, including MAX66040K-000AA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX66040K-000AA+ requirements.
6.How does Aetrix verify that MAX66040K-000AA+ is sourced from the original manufacturer or authorized distributors?
All MAX66040K-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 MAX66040K-000AA+ meets industry standards.
7.What is the process for return or replacement of MAX66040K-000AA+?
All MAX66040K-000AA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX66040K-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 MAX66040K-000AA+ part is unused and in its original packaging.
Return procedure for MAX66040K-000AA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX66040K-000AA+ Tags
-
SL3S1013FTB0,115
NXP Semiconductors
-
NTP53321G0JHKZ
NXP Semiconductors
-
HTSH4801ETK,118
NXP Semiconductors
-
NTA53321G0FHKZ
NXP Semiconductors
-
RF-HDT-DVBE-N2
Texas Instruments
-
RF-HDT-DVBB-N2
Texas Instruments
-
HT2DC20S20/F/RSP
NXP Semiconductors
-
TRPGR30ATGA
Texas Instruments
-
TRPGR30ATGC
Texas Instruments
-
RI-TRP-DR2B-40
Texas Instruments
-
V680-D1KP52MT
Omron Automation and Safety
-
HTMS8001FTB/AF,115
NXP USA Inc.
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