T5554

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 7 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


Specifications

Parameter	Symbol	Value	Unit
Maximum DC current into Coil 1/ Coil 2	Icoil	10	mA
Maximum AC current into Coil 1/ Coil 2, f = 125 kHz	icoil pp	20	mA
Power dissipation (dice) 1)	Ptot	100	mW
Electro-static discharge maximum to MIL-Standard 883 C method 3015	Vmax	2000	V
Operating ambient temperature range	Tamb	40 to +85
Storage temperature range 2)	Tstg	40 to +125
Maximum assembly temperature for less than 5 min 3)	Tsld	+150

Notes: 1) Free-air condition, time of application: 1 s
           2) Data retention reduced
           3) Assembly temperature of 150°C for less than 5 minutes does not affect the data retention.

Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.


Description

The T5554 is a contactless R/W-IDentification IC (IDIC^®)* 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. Coil and chip together form a transponder.

The on-chip 264-bit EEPROM (8 blocks 33 bits each) T5554 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.

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.