T5557 Datasheet, PDF (1/30 Pages) ATMEL Corporation – Multifunctional 330-bit Read/Write RF-Identification IC

Features
• Contactless Read/Write Data Transmission
• Radio Frequency f_RF from 100 kHz to 150 kHz
• e5550 Binary Compatible or T5557 Extended Mode
• Small Size, Configurable for ISO/IEC 11784/785 Compatibility
• 75 pF On-chip Resonant Capacitor (Mask Option)
• 7 x 32-bit EEPROM Data Memory Including 32-bit Password
• Separate 64-bit memory for Traceability Data
• 32-bit Configuration Register in EEPROM to Setup:
– Data Rate
- RF/2 to RF/128, Binary Selectable or
- Fixed e5550 Data Rates
– Modulation/Coding
- FSK, PSK, Manchester, Biphase, NRZ
– Other Options
- Password Mode
- Max Block Feature
- Answer-On-Request (AOR) Mode
- Inverse Data Output
- Direct Access Mode
- Sequence Terminator(s)
- Write Protection (Through Lock-bit per Block)
- Fast Write Method (5 kbps versus 2 kbps)
- OTP Functionality
- POR Delay up to 67 ms
Multifunctional
330-bit
Read/Write
RF-Identification
IC
T5557
Description
The T5557 is a contactless R/W IDentification IC (IDIC^â) for applications in the
125 kHz frequency range. A single coil, connected to the chip, serves as the IC’s
power supply and bi-directional communication interface. The antenna and chip
together form a transponder or tag.
The on-chip 330-bit EEPROM (10 blocks, 33 bits each) can be read and written block-
wise from a reader. Block 0 is reserved for setting the operation modes of the T5557
tag. Block 7 may contain a password to prevent unauthorized writing.
Data is transmitted from the IDIC using load modulation. This is achieved by damping
the RF field with a resistive load between the two terminals Coil 1 and Coil 2. The IC
receives and decodes 100% amplitude modulated (OOK) pulse interval encoded bit
streams from the base station or reader.
System Block Diagram
Figure 1. RFID System Using T5557 Tag
Reader
Baseorstation
Base station
Power
Data
Transponder
Memory
*
T5557
* Mask option
Rev. 4517E–RFID–02/03
1