Features
•
•
•
•
•
•
•
•
•
•
•
•
Low-power, Low-voltage Operation
Contactless Power Supply
Contactless Read/Write Data Transmission
Radio Frequency (RF): 100 kHz to 150 kHz
264-bit EEPROM Memory in 8 Blocks of 33 Bits
224 Bits in Seven Blocks of 32 Bits are Free for User Data
Block Write Protection
Extensive Protection Against Contactless Malprogramming of the EEPROM
On-chip Resonance Capacitor (70 or 200 pF Mask Option)
Anticollision Using Answer-On-Request (AOR)
Typical < 50 ms to Write and Verify a Block
Other Options Set by EEPROM:
– Bitrate [bit/s]: RF/8, RF/16, RF/32, RF/40, RF/50, RF/64, RF/100, RF/128
– Modulation: BIN, FSK, PSK, Manchester, Biphase
– Other: Terminator Mode, Password Mode, AOR Mode
Description
The T5554 is a contactless R/W-IDentification IC (IDICÒ) for general-purpose applications in the 125 kHz range. A single coil, connected to the chip, serves as the IC’s
power supply and bidirectional communication interface. The coil and chip together
form a transponder.
The on-chip 264-bit EEPROM (8 blocks 33 bits each) can be read and written blockwise from a base station. The blocks can be protected against overwriting. One block
is reserved for setting the operation modes of the IC. Another block can contain a
password to prevent unauthorized writing.
Standard R/W
IDIC (264 Bit)
with Integrated
Capacitance
T5554
Preliminary
Reading occurs by damping the coil by an internal load. There are different bitrates
and encoding schemes possible. Writing occurs by interrupting the RF field in a special way.
System Block Diagram
Figure 1. RFID System Using T5554 Tag
Base station
Data
Controller
Power
Coil interface
Transponder
Memory
T5554
Rev. 4576A–RFID–12/02
1
