ST25TB512 Card

Descripción

Technical Specifications:

Chip Series: ST25TB Series (including ST25TB512-AT/AC models)

Communication Protocol: ISO/IEC 14443-2 Type B (Proprietary Protocol Extension)

Operating Frequency: 13.56 MHz Carrier Frequency

Subcarrier Frequency: 847 kHz (for BPSK modulation data return)

Data Rate: 106 kbit/s (Bidirectional transmission)

Storage Structure:

Total Capacity: 512-bit EEPROM

Organisation: 16 blocks × 32 bits (some sources say 128 blocks, may vary depending on the model)

Unique Identifier (UID): 64-bit unique ID for device identification

Anti-collision Mechanism: Time slot arbitration based on 8-bit Chip_ID, supports simultaneous reading of multiple tags

Counter Function: Integrated two 32-bit decrementing binary counters with tear protection

OTP Area: Resettable one-time programmable area, supports secure status marking

Write/erase cycle life: 1 million write/erase cycles

Data retention: Over 40 years

Internal tuning capacitor: 68 pF, simplifies antenna matching design

Key Features:

High-Reliability EEPROM: Industrial-grade durability, suitable for high-frequency read/write environments.

Dual Counter Design: Supports “single/multiple pass” logic, widely used in transportation ticketing systems.

Anti-tearing Protection: Ensures data integrity during power outages or signal interruptions.

Strong Anti-interference Capability: Optimised RF interface design ensures stable operation in complex electromagnetic environments.

Low-Power Passive Design: Battery-free, powered by the reader’s electromagnetic field, ready to use immediately.

Supports Reusable Scenarios: Optimised for reusable scenarios such as public transport cards and event tickets.

Why Choose the ST25TB512?

The ST25TB512 offers an excellent balance of compact memory size, energy efficiency, and robust performance. Its compatibility with industry-standard RFID systems and passive power operation ensures easy integration and maintenance-free operation in access control, hospitality, and payment applications.

Application Areas

Public Transportation: Bus cards, subway tickets, shared bicycle authorisation cards

Event Ticketing: Electronic tickets and anti-counterfeiting verification for concerts and sporting events

Asset Tracking: Maintenance cycle records for industrial equipment, tools, and instruments

Brand Anti-counterfeiting: NFC verification tags for high-value goods such as luxury goods and alcoholic beverages

Access Control and Identification: Visitor cards, temporary passes, exhibition badges

Smart Industry: Maintenance record tracking, equipment usage statistics

Technical Specifications