RFID products
Products – Micro RWD Hitag 1/S
  Low-cost proximity RFID reader module supporting Philips Hitag 1, Hitag S256 and
Hitag S2048 passive RFID transponders/tags

The module is completely housed within a 24-pin DIP package (pin compatible with
other modules) and only requires a 5v supply and a 700 micro-Henry antenna coil to
be a fully featured read/write and tag acceptance system.

The RWD module has outstanding RF drive capability and has a read/write range to ISO
card size tags of up to 20cm whilst maintaining reliable communication and high
resilience to EMC corruption. This has been achieved through the RWD continuously
self-tuning to allow for inductive changes in the RF field and extensive software/hardware
filtering.

Micro RWD H1/S also supports an optional data encryption system that allows data to be
stored on the tag in an encrypted format. This encryption algorithm is linked to the tag’s
unique serial number and protects data from unauthorised access.

   

 
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, encryption keys, lists of authorised serial numbers and supports direct LED drives to give visual indication of acceptance. Up to 100ma of drive current is also provided as an output that can be used to switch external loads.

Download Micro RWD Hitag 1/S data sheet

Different versions are available which use the spare I/O pins to output data as clock/data signals or Weigand protocol signals (in addition to standard TTL RS232 interface).

Download Micro RWD H1/S (Wiegand output) data sheet

We can customise RWD interface and features for your application, contact us for
more information

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

  
Parameter
Typical Value
Supply Voltage 5v DC
Operating temperature -25 deg C to + 70 deg C
Average current consumption with default polling cycle delay 20ma
Peak antenna voltage (tuned with optimum Rant = 31.5) 110v
Peak current (Antenna tuned with Rant = 31.5, Ra = 22 R)

(NOTE RF IS NORMALLY OFF AND IS ONLY TURNED ON DURING TAG COMMUNICATION RESULTING IN VERY SHORT BURST OF UP TO 200MA CURRENT CONSUMPTION)

 200ma max
Communication time for reading 40 bit serial number 20ms
Communication time for 32 bit WRITE operation 30ms
Maximum data rate (between Tag and RWD) 4k bits/sec
Range (dependent on antenna dimensions) Up to 20cm
Output relay drive Up to 100ma sink
Switch input (pulled up) Active low
Serial Interface TTL level RS232
Communication Parameters 9600 baud, 8 data bits, no parity, 1 stop bit protocol
with CTS handshake
   
       
Micro RWD HITAG1/S
click on the image to
enlarge
 
     

 
   
Hitag S tag has up to 2048 bits (256 byte) read/write memory of which up to 248 bytes are available for user data storage. The first four bytes of memory contain a factory set 32 bit (4 byte) unique serial number.  
   
       

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