* Identification Transponder in Plastic Brick Package
* Compatible ATA5557, ATA5567.
* Includes Ferrite Coil and Capacitor for Tuned Circuit Antenna 
* Basic Component: Atmel  ®   ATA5577M1330C IDIC  ® 
* Contactless Power Supply 
* Contactless Downlink Data Transmission 
* Radio Frequency fRF  = 125kHz 
* 363-bit EEPROM Memory in Total: 11 Blocks ×  (32 Bits + 1 Lock-Bit)
* 7 × 32 Bits EEPROM User Memory Including 32-bit Password Memory 
* 2 × 32 Bits Unique ID 
* 1 × 32-bit Option Register in EEPROM to Set Up the Analog Front End: 
* Clock Detection Level 
* Gap Detection Level 
* Improved Downlink Timing 
* Clamp Voltage 
* Modulation Voltage 
* Soft Modulation Switching 
* Write Damping like the Atmel T5557/ATA5567 or with Resistor 
* Downlink Protocol 
* 1 x 32-bit Configuration Register in EEPROM to Set Up: 
* Data Rate: 
* RF/2 to RF/128, Binary Selectable or 
* Fixed Basic Mode Rates 
* Modulation/Coding: 
* ASK, FSK, PSK, Manchester, Bi-phase, NRZ 
* Other Options:
* Password Mode 
* Max Block Feature 
* Direct Access Mode 
* Sequence Terminator(s) 
* Block-wise Write Protection (Lock Bit) 
* Answer-On-Request (AOR) Mode 
* Inverse Data Output 
* Disable Test Mode Access 
* Fast Downlink (~6Kbits/s vs. ~3Kbits/s) 
* OTP Functionality 
* Init Delay (~67ms)

Radio-frequency identification (RFID) tags may appear to be the ideal choice, for research shows that companies which adopt such item-level tagging programs have a 98 to 99.9 % inventory accuracy rate plus a 4 to 21 percent begin sales. However, the fact is that RFID tags will set you back much more than simple barcode symbols.contactless cards