Products and Services:

CFG Contactless Identification Products
Miniature Read/Write Head
CFG 188 220



The CFG 188 220 is a miniature Read/Write head designed for reading and writing to passive RF/ID tags and badges operating at a carrier frequency of 125 kHz. Its flexible software-based architecture allows it to be configured for communication with tags and badges from different manufacturers. Indeed, with the appropriate PROM, one head can manage tags from several different manufacturers.


Because of its small size and simple interface, the CFG 188 220 head is particularly well-suited for contactless identification applications. It can easily be integrated into systems such as portable terminals, control panels, PC's, cash registers, etc. This makes it an ideal subsystem for OEM and other manufacturers.


  • Cost effective, standard module
  • Compact format: 27 mm x 67 mm
  • Interfaces: RS 232 ; optional: I2C, 6 I/O lines
  • 5 V power supply
  • Connection for external antennae of different sizes and shapes
  • Easy connection to PC or other system. Internal watchdog possible
  • Custom software available for badges and tags based on Philips (PCF7930), EM (400x, 4050), Temic (e5530, e5550) chips


Dimensions 27 mm x 67 mm
Operation with PC or other microprocessor system
Interface PC / m P RS232 (9600 baud)
optional : I2C, 6 I/O lines
On-board antenna yes ( f 24 mm )
External antenna to be soldered to PCB
Power supply 5 VDC ± 5%
typically 80 mA (on-board antenna)
Read distance for
credit card format tag
on-board antenna : approx. 7 cm
external antenna : 20 cm max.
Operating temperature - 20° to + 65° C
Storage température - 20° to + 85° C

May 1998 Specifications may be modified without notice