RFID products
Products – Micro iTAG (Mifare)
  Ultra low-power version of RWD-MIFARE with integrated antenna. Designed for proximity use with BUTTON tags, Mifare cards and many other transponder package types (range up to 3 cm).

Just requires a 5 volt supply to be a fully featured Mifare read / write system with automatic outputs for serial number (UID) and card data (serial or Wiegand protocol) - no external antenna required. There is also a programmable "BEEP" output pin that can be used for external control or to drive an audible sounder.

Simple to design-in and use, complete RFID reader solution with average current consumption less than 100 micro Amps even when fully active.

 

The RWD module has a TTL level RS232 interface that allows a host system to send
and receive easy-to-use optimised commands/data (for example: Ascii “R” command
to read tag data and Ascii “W” command to write tag data).

The RWD also has internal EEPROM memory for holding system parameters, security
key codes, lists of authorised serial numbers and supports direct LED drives to give
visual indication of acceptance. The Auxiliary outputs can each provide up to 25mA
of current to drive external loads.

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Basic electrical specification without LEDs fitted and no auxiliary output drive.


Parameter
Typical Value
Supply Voltage (performance optimised for
5 volt operation)		 4 - 6 volts DC (operation from 4 x Alkaline cells)
Operating temperature -25 deg C to + 85 deg C
AVERAGE current consumption
(1 second polling)		 less than 100 micro Amps
Active period for RF AND host communication (each polling cycle) up to 20mS
Peak antenna current (optimum tuning) for short period each polling cycle (up to 10 mS burst)

 up to 150mA max
Polling Delay (SLEEP / Power-down mode) 4mS to 8 seconds
Communication time for 16-byte WRITE operation 2ms
Maximum data rate (between Tag and RWD) 106k bits/sec
Range (optimum antenna tuning) Up to 3cm
Auxiliary output drives (source current) Up to 25mA each
"BEEP" output signal (sinks current) Pulled low for zero to 10 seconds (programmable)
Serial Interface TTL level RS232 and 24 / 32 bit Wiegand
Communication Parameters 9600 baud, 8 data bits, no parity, 1 stop bit protocol
with CTS handshake
   
 

Micro iTAG
24-pin DIL package
(32mm X 18mm X 5mm)
Integrated antenna simplifies design-in and allows use in any system


click on the image to
enlarge

 

 

  Examples of RFID iTAG "BUTTONS" each with a unique serial number and 1k Bytes of secure password locked memory segments

 

 

 

 

 

 

 

 
 
Mifare 1k has 1024 bytes of read/write memory (4k version has 4096 bytes of memory) which is divided up into 16 segments (40 on 4k version), each secured by programmable key codes.

Ultralight has a 256 byte read/write memory without the key code security. All Mifare cards have a unique serial number factory-programmed at the first location in memory.

    
     
       

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Registered Office: PO Box 747, Aylesbury, Buckinghamshire, HP22 9BG, UK.
Site last updated 12th February 2008