ST25TB04 Card

Description

Technical Specifications

Chip Model: ST25TB04K

Communication Protocol: ISO/IEC 14443-2 Type B (Supports proprietary extended instructions)

Operating Frequency: 13.56 MHz Carrier

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

Data Transfer Rate: 106 kbit/s (Bidirectional high-speed communication)

Storage Capacity:

Total User Space: 4096-bit (4Kbit) EEPROM

Storage Structure: 16 blocks × 32 bits

Unique Identifier (UID): 64-bit unchangeable chip ID

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

OTP Area: Resettable one-time programmable area for status marking

Anti-collision Mechanism: Supports simultaneous reading of multiple tags to avoid signal interference

Write/Erase Cycles: Up to 1 million write/erase cycles

Data Retention Time: 40 Over 1 year old

Power supply: Passive design, powered by the reader’s electromagnetic field induction

Internal tuning capacitor: 68 pF, simplifying antenna matching design

Key Features

Large-capacity storage: Compared to the ST25TB512’s 512-bit, the ST25TB04K offers 8 times the storage space, suitable for applications requiring more data recording.

Dual counter design: Natively supports decrementing counting logic, suitable for scenarios such as bus tickets and event entry control.

Anti-tear protection mechanism: Ensures data integrity during communication interruptions, preventing counting errors or information loss.

High anti-interference capability: Optimised RF interface design ensures stable operation even in complex electromagnetic environments.

Low-power passive architecture: No battery required; simply attach to cards, tags, wristbands, etc.

Supports reusable systems: Optimised for reusable scenarios, such as transportation cards and rental device authorisation.

Why Choose the ST25TB04?

With 4 Kbit memory and reliable CMOS fabrication, the ST25TB04 strikes a balance between storage capacity and durability for a wide range of contactless applications. Its compatibility with ISO standards and passive power design ensures easy integration and long-term maintenance-free use, perfect for secure access control and payment solutions.

Application Areas

Public Transportation: Subway multi-trip cards, bus monthly passes, shared bicycle electronic keys

Event Management: Multi-day passes or limited-entry tickets for sporting events and concerts

Asset Lifecycle Tracking: Industrial equipment maintenance records, instrument usage statistics

Brand Anti-counterfeiting and Traceability: NFC verification tags on high-end wines, luxury goods, and pharmaceutical packaging

Smart Access Control: Visitor access cards, temporary access passes, electronic badges for exhibitions

Medical Consumables Management: Reagent bottle usage tracking, reusable instrument sterilization cycle records

Unlike the Mifare series, the ST25TB04K uses the Type B protocol, offering stronger signal penetration and anti-interference capabilities, and natively supports counting functions, making it more suitable for industrial applications requiring status management and data persistence.

Technical Specifications