T555711-DDW Atmel, T555711-DDW Datasheet - Page 2

• Manufacturer Part Number: T555711-DDW
• Description: IC IDIC R/W RFID 330BIT ON-CHIP
• Manufacturer: Atmel
• Series: T555711r

Specifications of T555711-DDW

• Rf Type: Read / Write
• Frequency: 125kHz
• Features: 330-bit EEPROM
• Package / Case: DICE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2. System Block Diagram
3. T5557 – Building Blocks
3.1
2
Analog Front End (AFE)
T5557
Figure 2-1.
Figure 3-1.
The AFE includes all circuits which are directly connected to the coil. It generates the IC’s power
supply and handles the bi-directional data communication with the reader. It consists of the fol-
lowing blocks:
• Rectifier to generate a DC supply voltage from the AC coil voltage
• Clock extractor
• Switchable load between Coil 1/Coil 2 for data transmission from tag to the reader
• Field gap detector for data transmission from the base station to the tag
• ESD protection circuitry
Base station
Base station
Reader
or
Coil 2
Coil 1
RFID System Using T5557 Tag
Block Diagram
* Mask option
*
Power
Data
Modulator
Mode register
* Mask option
Test logic
Controller
*
Transponder
T5557
HV generator
Input register
EEPROM)
(330-bit
Memory
POR
Memory
4517J–RFID–03/06