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STMicroelectronics ST25TA02KB-AC6F5
- Part No.:
- ST25TA02KB-AC6F5
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- Die
- Datasheet:
-
ST25TA02KB-AC6F5.pdf
- Description:
- IC RFID TRANSP 13.56MHZ WAFER
- Quantity:
- Payment:
- Shipping:
Inventory:1,447
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Product details
Overview
ST25TA02KB-AC6F5 from STMicroelectronics is an NFC Forum Type 4 Tag IC compliant with ISO/IEC 14443 Type A, featuring 2-Kbit EEPROM (256 bytes), 7-byte UID, 128-bit password protection, and TruST25™ digital signature for anti-cloning. It operates contactlessly at 13.56 MHz with 106 kbps data rate and supports NDEF data structure in secure industrial tagging and smart packaging applications.
For engineers reviewing the ST25TA02KB-AC6F5 datasheet, ST25TA02KB-AC6F5 pinout, ST25TA02KB-AC6F5 application, or ST25TA02KB-AC6F5 equivalent, key selection criteria include NFC Type 4 compliance, 200-year data retention, 1M-cycle endurance, GPO configurability (open-drain variant), and TruST25™-enabled origin verification - all critical for secure, field-deployable RFID tag design.
Technical Context
The ST25TA02KB-AC6F5 implements a fully autonomous RF-powered architecture with analog front-end tuned to 13.56 MHz, integrated 50 pF internal capacitance, and ISO/IEC 14443-A protocol stack supporting NFC Forum Type 4 Tag commands. Its memory subsystem includes three dedicated files: System (ST-proprietary), Capability Container (CC), and NDEF - enabling standardized interoperability while retaining vendor-specific security controls.
It features a configurable general-purpose output (GPO) implemented as an open-drain terminal requiring external pull-up ≥4.7 kΩ, activated by events including SessionOpen, WIP, MIP, or FieldDetect. The GPO is synchronized with RF session state and supports real-time host notification without DC consumption - confirmed in ST's DS12365 Rev 2 Figure 6 and Table 8.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| NFC Compliance | NFC Forum Type 4 Tag certified; ensures interoperability with all NFC Forum–compliant readers and smartphones. |
| Memory Capacity | 256-byte (2-Kbit) EEPROM with NDEF file support; enables full NDEF message storage including URI, text, or smart poster records. |
| Data Retention | 200 years at 25°C; guarantees long-term data integrity in passive, maintenance-free deployments like asset labels or medical device tags. |
| Endurance | 1 million erase-write cycles; supports frequent reprogramming in dynamic logistics or firmware update scenarios. |
| RF Interface | ISO/IEC 14443 Type A, 106 kbps; compatible with legacy and modern NFC infrastructure without protocol translation. |
| Security Features | TruST25™ digital signature + 128-bit read/write passwords + 20-bit anti-tearing event counter; provides cryptographic origin proof and granular access control. |
| Internal Tuning | 50 pF integrated capacitance; reduces external component count and simplifies antenna matching for compact PCB layouts. |
Pinout & Package
ST25TA02KB-AC6F5 uses UFDFPN5 package (1.7 × 1.4 mm, 0.45 mm height), RoHS-compliant and ECOPACK®2 qualified. Pin 1 is marked by laser etching on top-side marking area per ST's DS12365 Section 13.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC0 / AC1 | Antenna coil interface | Differential RF input pair; connects directly to printed loop antenna - no DC path allowed; defines coupling efficiency and operating range. |
| VSS | Ground reference | Common return for RF analog front-end and digital logic; must be low-impedance to minimize noise coupling into sensitive RF path. |
| GPO | Configurable open-drain output | Drives external interrupt line or LED; requires ≥4.7 kΩ pull-up; active-low signaling enables zero-static-current wake-up of microcontrollers. |
Key Features
| Feature | Design Value |
|---|---|
| NDEF-compliant memory architecture | Predefined CC, NDEF, and System files enable plug-and-play integration with Android/iOS NFC stacks without custom driver development. |
| TruST25™ digital signature | Hardware-rooted cryptographic signature proves chip origin during RF interrogation - prevents counterfeit tag substitution in regulated supply chains. |
| 128-bit dual-password protection | Independent read/write passwords with 3-state access control (unprotected/protected/forbidden) allow layered security policies per deployment phase. |
| 20-bit anti-tearing event counter | Tracks first NDEF read/write after session select; immune to power loss mid-increment - ensures audit-trail reliability in tamper-evident use cases. |
| Single-command bulk operations | Read up to 256 bytes or write up to 54 bytes per command - minimizes RF session duration and improves throughput in high-volume scanning environments. |
Applications
| Smart Packaging Authentication | Industrial Asset Tagging |
|---|---|
|
Use Scenario: Tamper-proof labeling of pharmaceutical blister packs or luxury goods boxes to verify authenticity at point-of-sale or distribution checkpoints. IC Role / Device Role / Timing Role: NFC Tag IC providing cryptographically signed UID and NDEF-stored batch/lot data; responds within 106 kbps timing window upon reader field activation. Use Value: TruST25™ signature blocks cloning; 200-year data retention ensures shelf-life alignment; 1M-cycle endurance supports repeated verification scans across product lifetime. |
Use Scenario: Permanent identification and maintenance history logging for factory-floor tools, calibration equipment, or HVAC components exposed to vibration and temperature cycling. IC Role / Device Role / Timing Role: Passive RFID tag powered solely by reader field; stores calibrated parameters and service dates in NDEF format accessible via handheld NFC scanner. Use Value: UFDFPN5 footprint survives mechanical stress; 256-byte EEPROM holds firmware version, last-service date, and technician ID; GPO signals scan completion to embedded controller. |
| Secure Access Credentials | IoT Device Onboarding |
|
Use Scenario: Embedding in physical keys, badges, or door handles to authenticate users for building entry or logical system access. IC Role / Device Role / Timing Role: Secure NFC tag delivering encrypted credentials via NDEF; enforces password-protected write access to prevent credential overwrite. Use Value: 128-bit password protection prevents unauthorized reprogramming; 7-byte UID serves as immutable hardware identity; anti-tearing counter logs each authentication attempt. |
Use Scenario: Zero-touch provisioning of Wi-Fi credentials or TLS certificates to edge sensors during manufacturing or field installation. IC Role / Device Role / Timing Role: Factory-programmed tag holding SSID, PSK, and root CA certificate in NDEF format; read once during device boot to configure wireless stack. Use Value: Eliminates manual configuration; 256-byte capacity fits full WPA3-Enterprise payloads; TruST25™ ensures only authorized tags initiate onboarding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NFC Type 4 tag applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST25TA02KB-D | Same die, identical EEPROM and security features; differs only in GPO implementation - open-drain (no VDCG pin) vs. ST25TA02KB-AC6F5's open-drain variant with same pinout. | No VDCG supply required; simpler power routing but lacks CMOS GPO option. | Select when GPO must drive low-power interrupt lines without external voltage rail; matches ST25TA02KB-AC6F5's pinout and RF behavior exactly. |
| NT3H2111W0FHKH | NXP part with 2-Kbit EEPROM, NFC Forum Type 4, but uses different security model (AES-128 vs. TruST25™) and lacks anti-tearing counter. | Supports Fast Read mode (up to 848 kbps); optimized for high-throughput retail scanning rather than long-term audit logging. | Choose for AES-based enterprise ecosystems where NXP toolchain integration is preferred; avoid if TruST25™ origin verification or 20-bit counter is mandatory. |
Compared with ST25TA02KB-D, ST25TA02KB-AC6F5 offers identical RF performance and memory but shares the same open-drain GPO implementation; versus NT3H2111, it trades Fast Read capability for stronger cryptographic provenance and deterministic event tracking - making it superior for traceability-critical deployments.
Availability
ST25TA02KB-AC6F5 is available at Aetrix Electronics and suitable for secure smart packaging, industrial asset tagging, access credential systems, and IoT device onboarding requiring stable component supply, long-lifecycle support, and guaranteed authentic silicon sourcing.
Supply support for ST25TA02KB-AC6F5 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, specializing in secure microcontrollers, power management, and sensing technologies for industrial, automotive, and consumer markets.
The ST25 family targets secure NFC-based identification and data exchange, designed specifically for tamper-resistant tagging, anti-counterfeiting, and trusted device onboarding - with ST25TA02KB-AC6F5 representing its cost-optimized, high-reliability Type 4 Tag variant.
FAQ
Does ST25TA02KB-AC6F5 require an external tuning capacitor?
No. The device integrates 50 pF internal tuning capacitance, eliminating the need for external capacitors in most antenna designs. This simplifies layout and improves consistency across production units, as confirmed in the "Wafer Features" section and DS12365 Section 2.1.
How is the GPO configured for interrupt signaling in ST25TA02KB-AC6F5?
The GPO is preconfigured as open-drain and activated by writing 0b010 to bits [3:0] of the GPO configuration byte (offset 0x0002 in System file). It drives low on "Writing In Progress" (WIP) events and requires ≥4.7 kΩ external pull-up - verified in DS12365 Table 8 and Figure 6.
What is the functional difference between ST25TA02KB-AC6F5 and ST25TA02KB-P?
ST25TA02KB-AC6F5 uses the same open-drain GPO as ST25TA02KB-D, whereas ST25TA02KB-P implements a CMOS GPO with VDCG supply pin. The -AC6F5 variant omits VDCG and supports only open-drain operation - confirmed by pinout diagrams in DS12365 Figures 4 and 5.
Can the 128-bit passwords be changed after initial programming?
Yes - both read and write passwords can be updated using the Verify command followed by Change Reference Data (CRD) procedure, provided the current password is known and the protection mode is not set to FORBIDDEN. Delivery state defaults to all-zeroes, per DS12365 Section 3.4.
ST25TA02KB-AC6F5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ST25T
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- RFID Transponder
- Frequency:
- 13.56MHz
- Standards:
- ISO 14443, NFC
- Interface:
- I2C
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Wafer
ST25TA02KB-AC6F5 FAQ
1.How can I place an order for ST25TA02KB-AC6F5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25TA02KB-AC6F5 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 ST25TA02KB-AC6F5 reliable?
The price and inventory of ST25TA02KB-AC6F5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25TA02KB-AC6F5 is usually 5 days.
3.What payment methods are accepted for ST25TA02KB-AC6F5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25TA02KB-AC6F5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25TA02KB-AC6F5?
ST25TA02KB-AC6F5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25TA02KB-AC6F5 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 ST25TA02KB-AC6F5?
For technical support, including ST25TA02KB-AC6F5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25TA02KB-AC6F5 requirements.
6.How does Aetrix verify that ST25TA02KB-AC6F5 is sourced from the original manufacturer or authorized distributors?
All ST25TA02KB-AC6F5 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 ST25TA02KB-AC6F5 meets industry standards.
7.What is the process for return or replacement of ST25TA02KB-AC6F5?
All ST25TA02KB-AC6F5 units undergo pre-shipment inspection (PSI). If there is an issue with ST25TA02KB-AC6F5, 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 ST25TA02KB-AC6F5 part is unused and in its original packaging.
Return procedure for ST25TA02KB-AC6F5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST25TA02KB-AC6F5 Tags
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SL2S2602FTBX
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