EM4205/EM4305卡：
1， 512 bit EEPROM organized in 16 words of 32 bit
2， 32 bit unique identifier (UID)
3， 32 bit Password read and write protection
4， ISO 11784 / 11785 Standard Compliant
5， Lock feature converts EEPROM words into Read Only
6， Two data encodings: Manchester and Bi-phase
7， Multi-purpose data rate: 8, 16, 32 and 64 RF clocks
8， Reader Talk First feature
9， Compatible with EM4469/EM4569 communication protocol
10， 100 to 150 kHz frequency range
11， On-chip rectifier and voltage limiter
12， No external supply buffer capacitor needed
13， -40°C to +85°C temperature range
14， Very low power consumption
15， Enlarged bumped pads (200 μm x 400 μm) for direct connection of coil (EM4305)
16， EM4205: 2 resonant capacitor versions 210pF or 250pF selectable by mask option. The resonant capacitor can be trimmed, at factory level, to offer accuracy on the tolerance of 3%.