My Inquiry
My Account
STMicroelectronics ST25TB512-AT6G6
- Part No.:
- ST25TB512-AT6G6
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- Die
- Datasheet:
-
ST25TB512-AT6G6.pdf
- Description:
- IC RFID TRANSP 13.56MHZ WAFER
- Quantity:
- Payment:
- Shipping:
Inventory:2,157
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ST25TB512-AT6G6 from STMicroelectronics is a contactless 512-bit EEPROM IC compliant with ISO 14443-2 Type B and ISO 14443-3 Type B standards, operating at 13.56 MHz carrier frequency with 847 kHz BPSK subcarrier modulation, supporting 106 kbit/s bidirectional data transfer, and featuring an 8-bit Chip_ID anticollision system and two 32-bit binary countdown counters with automated anti-tearing protection - used in reusable transport ticketing and smart card applications.
For engineers reviewing the ST25TB512-AT6G6 datasheet, ST25TB512-AT6G6 pinout, ST25TB512-AT6G6 application, or ST25TB512-AT6G6 equivalent, key selection considerations include ISO 14443-3B frame compatibility, 512-bit EEPROM block structure (16 × 32-bit), OTP-based write protection per block, 1 million erase/write cycles, and antenna interface requirements (AC0/AC1) for RF coupling design.
Technical Context
The ST25TB512-AT6G6 implements a probabilistic anticollision protocol using Slot_marker and Pcall16 commands to resolve multiple tags within a reader's field, with an 8-bit Chip_ID enabling selection among up to 256 devices. Its internal ASK demodulator accepts 10% amplitude-modulated 13.56 MHz carrier, while BPSK load modulation at 847 kHz enables reliable backscatter response.
Memory is partitioned into three functional zones: 12 blocks of user-accessible EEPROM (blocks 0–4 and 7–15), two dedicated 32-bit decrement-only counters (blocks 5–6), and a system area (block 255) containing OTP_Lock_Reg bits that permanently disable write access to individual blocks upon programming - all accessed via standardized 10-bit character frames with SOF/EOF framing and 16-bit CRC validation per ISO 14443-3B.
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 - defines RF coupling band and mandates matching antenna impedance and tuning capacitor (68 pF internal). |
| Data Rate | 106 kbit/s full-duplex - determines minimum frame timing (9.44 µs per ETU) and reader polling latency. |
| Memory Capacity | 512-bit EEPROM organized as 16 × 32-bit blocks - supports block-wise Read_block/Write_block with auto-erase cycle per write. |
| Counter Function | Two 32-bit binary decrement-only counters (blocks 5 & 6) with anti-tearing logic - enables tamper-resistant value tracking (e.g., fare deduction). |
| Endurance & Retention | 1 million erase/write cycles and 40-year data retention - qualifies for long-life reusable transit media requiring field reliability. |
| Unique ID | 64-bit ROM UID - provides immutable device identification for secure authentication and inventory management. |
Pinout & Package
ST25TB512-AT6G6 is a bare die (unsawn wafer or bumped/sawn wafer) with no conventional package or leadframe. It interfaces exclusively via two antenna bond pads: AC0 and AC1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC0 | Antenna Coil Terminal 0 | Direct bond pad for one end of external LC antenna loop; forms resonant tank with internal 68 pF capacitor. |
| AC1 | Antenna Coil Terminal 1 | Direct bond pad for opposite end of external LC antenna loop; completes RF energy harvesting path. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 14443-3B Frame Compliance | Full support for SOF/EOF framing, 10-bit characters, and 16-bit CRC (initial FFFFh) - ensures error detection and protocol-level interoperability with certified readers. |
| OTP-Based Block Protection | 16-bit OTP_Lock_Reg (block 255) allows permanent write-disable of any of 16 memory blocks - prevents unauthorized modification of critical data or counters. |
| Anti-Tearing Counter Logic | Hardware-enforced atomic decrement with power-loss recovery - guarantees counter integrity during unexpected RF field dropout in transit use cases. |
| Self-Timed Programming | 5 ms typical Write_block execution with internal timing control - eliminates need for external timing supervision or command sequencing delays. |
| 8-Bit Chip_ID Anticollision | Probabilistic slot-based resolution supporting up to 256 tags in field - enables high-throughput multi-tag interrogation in fare gates or access points. |
Applications
| Transport Ticketing | Secure Access Control |
|---|---|
|
Use Scenario: Reusable contactless transit cards for metro/bus systems where fare deduction must survive repeated field exposure and physical wear. IC Role / Device Role / Timing Role: Contactless EEPROM storing trip balance, validity period, and audit logs; counters track remaining rides with anti-tearing guarantee. Use Value: 40-year data retention and 1M write cycles ensure card lifetime exceeds mechanical durability; OTP lock prevents cloning of balance data. |
Use Scenario: Employee badge with dynamic credential storage and session-limited access rights updated over air. IC Role / Device Role / Timing Role: Secure non-volatile memory holding encrypted keys and revocation flags; UID enables unique identity binding to backend directory. Use Value: 64-bit UID + ISO 14443-3B compliance enables PKI integration; block-level OTP locking isolates sensitive credential sectors from general-use areas. |
| Industrial Asset Tagging | Reusable Logistics Labels |
|
Use Scenario: High-cycle maintenance log tags on factory equipment, recording service intervals and technician IDs across thousands of scans. IC Role / Device Role / Timing Role: Field-programmable EEPROM with write-protected calibration constants and incrementing service counters. Use Value: Internal 68 pF tuning capacitor simplifies antenna design for ruggedized labels; 106 kbit/s rate enables fast batch read in conveyor environments. |
Use Scenario: Returnable packaging labels reused across 50+ supply chain cycles, tracking origin, destination, and handling history. IC Role / Device Role / Timing Role: Dual-counter EEPROM logging inbound/outbound events; UID ties label to ERP system for lifecycle traceability. Use Value: Decrement-only counters prevent tampering with return eligibility; ISO 14443-2B compatibility ensures scanner interoperability across global logistics hubs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar contactless EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST25DV04K-IER | I²C interface + RF interface; 4-Kbit EEPROM; integrated RF transceiver with ESD protection; requires external MCU for RF protocol handling. | Designed for hybrid wired/wireless systems needing local processing; lacks native ISO 14443-3B anticollision stack. | Select when dual-interface (I²C + RF) and larger memory are required, and host MCU can manage RF protocol layers. |
| NXP NT3H2111W0FHKH | 1-Kbit EEPROM; NFC Forum Type 4A compliant (ISO 14443-4); supports NDEF message formatting; higher RF sensitivity (-6 dBm). | Optimized for smartphone-initiated interactions and cloud-connected services; includes NDEF parser hardware. | Select for consumer-facing NFC applications requiring smartphone compatibility and standardized data exchange formats. |
Compared with ST25TB512-AT6G6, ST25DV04K-IER adds I²C but removes autonomous anticollision, while NT3H2111W0FHKH offers NDEF and better sensitivity but targets smartphone-centric use - ST25TB512-AT6G6 remains optimal for cost-sensitive, high-volume ISO 14443-3B infrastructure deployments.
Availability
ST25TB512-AT6G6 is available at Aetrix Electronics and suitable for transport ticketing, secure access control, industrial asset tagging, and reusable logistics labels requiring stable component supply and long-term production continuity.
Supply support for ST25TB512-AT6G6 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 solutions for industrial, automotive, and consumer markets.
The ST25 series is STMicroelectronics' dedicated portfolio of contactless NFC/RFID tags and dynamic tags, engineered specifically for secure, low-power, ISO-compliant short-range wireless memory applications in transit, identification, and IoT edge nodes.
FAQ
What antenna design considerations apply to ST25TB512-AT6G6?
The ST25TB512-AT6G6 requires an external LC antenna tuned to 13.56 MHz, with total capacitance including its internal 68 pF tuning capacitor. Designers must calculate external inductance and parallel capacitance to achieve resonance, verify Q-factor >20 for sufficient field strength, and ensure AC0/AC1 bond pad layout minimizes parasitic inductance - mismatch causes reduced read range or failed power harvesting.
How does the anti-tearing protection work for the binary counters?
Anti-tearing protection uses hardware state monitoring during Write_block execution to the counter blocks (5 or 6): if RF power drops mid-write, the internal logic rolls back to the pre-write value and discards the incomplete update. This ensures counters only change atomically - critical for fare deduction where partial writes could corrupt remaining ride counts.
Can ST25TB512-AT6G6 be used with ISO 14443-3A (Type A) readers?
No - ST25TB512-AT6G6 is strictly ISO 14443-2/3 Type B compliant and incompatible with Type A modulation (100% ASK) and frame structure. It will not respond to Type A Init or REQB commands. Interoperability requires Type B readers supporting Pcall16, Slot_marker, and Select with 8-bit Chip_ID.
What happens after writing '0' to an OTP_Lock_Reg bit?
Writing '0' to any OTP_Lock_Reg bit (b16–b31 in block 255) permanently disables write access to the corresponding memory block (0–15). The bit cannot be reset to '1'. After programming, a Select command with valid Chip_ID must be issued to reload protection settings into active logic - otherwise, previously unlocked blocks remain writable until next Select.
ST25TB512-AT6G6 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
ST25TB512-AT6G6 FAQ
1.How can I place an order for ST25TB512-AT6G6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST25TB512-AT6G6 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 ST25TB512-AT6G6 reliable?
The price and inventory of ST25TB512-AT6G6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST25TB512-AT6G6 is usually 5 days.
3.What payment methods are accepted for ST25TB512-AT6G6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST25TB512-AT6G6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST25TB512-AT6G6?
ST25TB512-AT6G6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST25TB512-AT6G6 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 ST25TB512-AT6G6?
For technical support, including ST25TB512-AT6G6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST25TB512-AT6G6 requirements.
6.How does Aetrix verify that ST25TB512-AT6G6 is sourced from the original manufacturer or authorized distributors?
All ST25TB512-AT6G6 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 ST25TB512-AT6G6 meets industry standards.
7.What is the process for return or replacement of ST25TB512-AT6G6?
All ST25TB512-AT6G6 units undergo pre-shipment inspection (PSI). If there is an issue with ST25TB512-AT6G6, 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 ST25TB512-AT6G6 part is unused and in its original packaging.
Return procedure for ST25TB512-AT6G6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST25TB512-AT6G6 Tags
-
SL2S2602FTBX
NXP Semiconductors
-
ST25DV04K-IER6S3
STMicroelectronics
-
ST25DV04K-IER6C3
STMicroelectronics
-
LXMSJZNCMD-217
Murata Electronics
-
NT3H2111W0FTTJ
NXP Semiconductors
-
NT3H2111W0FHKH
NXP Semiconductors
-
M24LR04E-RMC6T/2
STMicroelectronics
-
ST25DV04KC-JF6D3
STMicroelectronics
-
ST25DV64KC-IE6S3
STMicroelectronics
-
ST25DV64K-IER6T3
STMicroelectronics
-
NT3H2211W0FTTJ
NXP Semiconductors
-
NT3H2211W0FHKH
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
