ISO14443-B Tag IC with 2 binary counters, full EEPROM user memory and anti-collision with 512-bit

The SRT512 is a contactless memory, powered by an externally transmitted radio wave. It contains a 512-bit user EEPROM. The memory is organized as 16 blocks of 32 bits. The SRT512 is accessed via the 13.56 MHz carrier. Incoming data are demodulated and decoded from the received amplitude shift keying (ASK) modulation signal and outgoing data are generated by load variation using bit phase shift keying (BPSK) coding of a 847 kHz subcarrier. The received ASK wave is 10% modulated. The data transfer rate between the SRT512 and the reader is 106 Kbit/s in both reception and emission modes.

The SRT512 follows the ISO 14443-2 Type B recommendation for the radio-frequency power and signal interface.

Key Features

  • ISO 14443-2 Type B air interface compliant
  • ISO 14443-3 Type B frame format compliant
  • 13.56 MHz carrier frequency
  • 847 kHz subcarrier frequency
  • 106 Kbit/second data transfer
  • 8 bit Chip_ID based anticollision system
  • 2 count-down binary counters with automated anti-tearing protection
  • 64-bit unique identifier
  • 512-bit EEPROM with write protect feature
  • Read_block and Write_block (32 bits)
  • Internal tuning capacitor
  • 1 million erase/write cycles
  • 40-year data retention
  • Self-timed programming cycle
  • 5 ms typical programming time


Technical Documentation

Product Specifications
Description Version Size
DS5143 DS5143: 13.56 MHz short-range contactless memory chip with 512-bit EEPROM and anticollision functions 8.0 724 KB
Application Notes
Description Version Size
AN2319 AN2319: Using the 64-bit UID in contactless RFID applications 2.2 64 KB
Technical Notes & Articles
Description Version Size
TA259 TA259: Designing low-cost large-volume close-coupling contactless systems with ST contactless memories and coupler 2.1 60 KB
TA0347 TA0347: Key features and benefits of STMicroelectronics short-range contactless memory ICs 2.1 100 KB
Support & Community

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
SRT512-SB12I/1GE Ni/Au Wafer Not Applicable - - NRND 0.082 10000 NEC EAR99 - MORE INFO

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SRT512-SB12I/1GE NRNDNi/Au WaferIndustrialN/A 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.