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STMicroelectronics ST25TB02K-AC6G6
- Part No.:
- ST25TB02K-AC6G6
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- Die
- Datasheet:
-
ST25TB02K-AC6G6.pdf
- Description:
- IC RFID TRANSP 13.56MHZ WAFER
- Quantity:
- Payment:
- Shipping:
Inventory:1,620
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Product details
Overview
ST25TB02K-AC6G6 from STMicroelectronics is a contactless 13.56 MHz short-range memory IC compliant with ISO 14443-2 Type B and ISO 14443-3 Type B standards, featuring 2048-bit EEPROM organized in 64 × 32-bit blocks, 64-bit unique identifier (UID), and dual 32-bit countdown binary counters with automated anti-tearing protection - deployed in RFID-enabled asset tagging and reusable transit ticketing systems.
For engineers reviewing the ST25TB02K-AC6G6 datasheet, ST25TB02K-AC6G6 pinout, ST25TB02K-AC6G6 application, or ST25TB02K-AC6G6 equivalent, key selection considerations include its 106 kbit/s ASK/BPSK data transfer rate, 847 kHz subcarrier modulation, 1 million erase/write cycles, 40-year data retention, and block-level write protection via OTP_Lock_Reg - all critical for secure, high-cycle-count NFC tag design.
Technical Context
The ST25TB02K-AC6G6 operates as a passive RF-powered memory device using amplitude shift keying (ASK) demodulation for reader-to-tag communication and bit phase shift keying (BPSK) load modulation at 847 kHz for tag-to-reader response. Its internal regulator derives power directly from the 13.56 MHz carrier field, eliminating need for on-board power sources.
It implements a probabilistic anticollision protocol based on slot markers and Chip_ID matching, supports nine standardized commands (e.g., Read_block, Write_block, Select, Get_UID), and enforces memory access control through three distinct areas: resettable OTP (blocks 0–4), two decrement-only counters (blocks 5–6), and lockable EEPROM (blocks 7–63).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface Standard | ISO 14443-2 Type B & ISO 14443-3 Type B compliant - ensures interoperability with standard NFC-B readers and infrastructure. |
| Carrier Frequency | 13.56 MHz - enables operation within globally licensed ISM band for short-range contactless communication. |
| Data Rate | 106 kbit/s bidirectional - defines maximum throughput for fast UID readout and block programming in high-throughput tagging environments. |
| Memory Capacity | 2048-bit EEPROM (64 × 32-bit blocks) - provides sufficient storage for cryptographic keys, usage logs, and configuration data in secure tags. |
| Write Endurance | 1 million erase/write cycles - supports multi-year reuse in applications like library books, medical tools, or industrial tool tracking. |
| Data Retention | 40 years at +25°C - guarantees long-term integrity of stored identifiers and calibration data without refresh. |
| Anticollision | 8-bit Chip_ID + probabilistic slot-based scanning - enables reliable identification of multiple tags simultaneously within reader field. |
| Internal Tuning Cap | 68 pF - simplifies antenna matching for compact PCB or flexible substrate implementations without external tuning components. |
Pinout & Package
ST25TB02K-AC6G6 is supplied as a bare die (unsawn wafer or bumped and sawn wafer) with no leaded package. It interfaces exclusively via two antenna pads: AC0 and AC1, which must be directly bonded to an external printed or wire-wound antenna coil.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC0 | Antenna Coil Terminal 0 | Primary RF input node - connects to one end of external LC antenna circuit; forms resonant tank with internal 68 pF capacitor. |
| AC1 | Antenna Coil Terminal 1 | Secondary RF input node - completes antenna loop; both AC0/AC1 carry induced 13.56 MHz carrier and modulated data signals. |
Key Features
| Feature | Design Value |
|---|---|
| Block-wise Read/Write | 32-bit Read_block and Write_block commands enable deterministic, CRC-protected memory access aligned with ISO 14443-3 framing. |
| Automated Anti-Tearing | Dual 32-bit countdown counters (blocks 5–6) include hardware-enforced atomic update logic to prevent partial writes during power loss. |
| OTP-Based Write Protection | 8-bit OTP_Lock_Reg (block 255) permanently locks EEPROM blocks 7–15 - prevents tampering of critical firmware or security parameters. |
| Resettable OTP Area | Five 32-bit blocks (0–4) support bit-wise 1→0 programming and full-area reload up to 2047 times via counter 6-triggered erase cycle. |
| Self-Timed Programming | 5 ms typical Write_block execution - eliminates need for external timing control; simplifies host MCU firmware for tag personalization. |
Applications
| Reusable Transit Ticketing | Secure Asset Tagging |
|---|---|
|
Use Scenario: Contactless fare cards used daily across metro systems, requiring multi-year durability and resistance to unauthorized reprogramming. IC Role / Device Role / Timing Role: Passive RFID memory storing encrypted trip history, balance, and validity flags - powered and interrogated by gate-mounted readers. Use Value: 1 million write cycles and 40-year data retention ensure card lifetime exceeds operational service window; OTP_Lock_Reg prevents balance manipulation. |
Use Scenario: High-value tools or medical instruments tracked across sterilization cycles and maintenance logs. IC Role / Device Role / Timing Role: Tamper-resistant memory holding calibration records, usage counters, and ownership metadata - read/written during docking or service station interaction. Use Value: Dual anti-tearing counters track sterilization cycles; UID+Chip_ID enables unambiguous fleet-wide identification without database collision. |
| Library Book Tracking | NFC-Enabled Product Authentication |
|
Use Scenario: Self-checkout kiosks scanning multiple books simultaneously in public libraries. IC Role / Device Role / Timing Role: ISO 14443-B-compliant tag enabling fast, collision-tolerant batch reading of stacked items via probabilistic anticollision. Use Value: 8-bit Chip_ID + slot marker protocol allows >95% successful read rate for 10+ tags in field - reducing manual intervention at checkout. |
Use Scenario: Luxury goods or pharmaceutical packaging embedding NFC tags to verify authenticity at point-of-sale. IC Role / Device Role / Timing Role: Secure memory storing cryptographic challenge-response seeds and production batch codes - accessed only after mutual authentication handshake. Use Value: Resettable OTP area stores revocable keys; UID+counter values provide time-bound proof-of-origin traceable to manufacturing line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar contactless memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST25DV02K-IER | I²C interface + RF interface; integrated EEPROM with dynamic NDEF support; requires external power for I²C mode. | Enables hybrid wired/wireless configuration updates - unsuitable for pure passive-only deployments. | Select when dual-interface flexibility (e.g., factory programming via I²C + field readout via NFC) is required. |
| M24LR02E-R | Same ISO 14443-B compliance but 2-Kbit EEPROM organized as 256 × 8-bit; no built-in counters or resettable OTP area. | Lacks anti-tearing counters and reloadable OTP - insufficient for lifecycle-critical counting or key rotation use cases. | Choose for cost-sensitive, low-complexity NFC tag designs where counter functionality is unnecessary. |
Compared with ST25TB02K-AC6G6, ST25DV02K-IER adds active I²C capability at the cost of passive-only simplicity, while M24LR02E-R omits critical reliability features like anti-tearing counters and OTP reload - making ST25TB02K-AC6G6 uniquely suited for high-integrity, long-life reusable tag applications.
Availability
ST25TB02K-AC6G6 is available at Aetrix Electronics and suitable for reusable transit ticketing, secure asset tagging, library book tracking, and NFC-enabled product authentication requiring stable component supply across multi-year production cycles.
Supply support for ST25TB02K-AC6G6 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, MEMS, and smart power devices for industrial, automotive, and consumer markets.
The ST25 series is ST's dedicated portfolio of NFC/RFID contactless memory chips optimized for secure, battery-free identification and data logging - engineered specifically for ISO 14443-B interoperability, high endurance, and tamper-resistant memory architecture.
FAQ
Does ST25TB02K-AC6G6 require an external power supply?
No. The device is fully passive and derives operating power solely from the 13.56 MHz electromagnetic field generated by the reader antenna. Its internal voltage regulator converts induced RF energy into stable DC supply for logic and EEPROM operations - eliminating need for batteries or PCB traces.
How is memory write protection enforced on ST25TB02K-AC6G6?
Write protection is implemented via the 8-bit OTP_Lock_Reg located at block address 255. Each bit controls write access to one EEPROM block (blocks 7–15); setting a bit to '0' permanently locks that block. Once locked, the protection cannot be reversed - ensuring immutable storage of critical firmware or security keys.
What happens if power is interrupted during a Write_block operation?
The ST25TB02K-AC6G6 incorporates hardware-level anti-tearing logic for both EEPROM writes and counter decrements. If power drops mid-programming, the internal state machine rolls back to the pre-write value - preserving data integrity without requiring host-side recovery protocols or CRC revalidation.
Can ST25TB02K-AC6G6 be used with ISO 14443-A readers?
No. ST25TB02K-AC6G6 is strictly ISO 14443-2 Type B and ISO 14443-3 Type B compliant. It does not support Type A modulation (100% ASK), frame structure, or anticollision protocol. Interoperability requires a Type B reader - such as those found in Android NFC stacks configured for Type B discovery or dedicated industrial RFID gateways.
ST25TB02K-AC6G6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ST25T
- Package/Case:
- Die
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- RFID Transponder
- Frequency:
- 13.56MHz
- Standards:
- ISO 14443
- Interface:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Wafer
ST25TB02K-AC6G6 FAQ
1.How can I place an order for ST25TB02K-AC6G6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25TB02K-AC6G6 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 ST25TB02K-AC6G6 reliable?
The price and inventory of ST25TB02K-AC6G6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25TB02K-AC6G6 is usually 5 days.
3.What payment methods are accepted for ST25TB02K-AC6G6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25TB02K-AC6G6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25TB02K-AC6G6?
ST25TB02K-AC6G6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25TB02K-AC6G6 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 ST25TB02K-AC6G6?
For technical support, including ST25TB02K-AC6G6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25TB02K-AC6G6 requirements.
6.How does Aetrix verify that ST25TB02K-AC6G6 is sourced from the original manufacturer or authorized distributors?
All ST25TB02K-AC6G6 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 ST25TB02K-AC6G6 meets industry standards.
7.What is the process for return or replacement of ST25TB02K-AC6G6?
All ST25TB02K-AC6G6 units undergo pre-shipment inspection (PSI). If there is an issue with ST25TB02K-AC6G6, 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 ST25TB02K-AC6G6 part is unused and in its original packaging.
Return procedure for ST25TB02K-AC6G6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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