EM4022
Description
The EM4022 (previously named P4022) chip implements patented anti-collision protocols for both high frequency and low frequency applications. It is even possible to identify transponders with identical codes, thereby making it possible to count identical items. The chip is typically used in “passive” transponder applications, i.e. it does not require a battery power source. Instead, it is powered up by an electromagnetic energy field or beam transmitted by the reader, which is received and rectified to generate a supply voltage for the chip. A preprogrammed code is transmitted to the reader by varying the amount of energy that is reflected back to the reader. This is done by modulating an antenna or coil, thereby effectively varying the load seen by the reader.
Typical Applications Access control Animal tagging Asset control Sports event timing Licensing Electronic keys Auto-tolling
Features
Implements all BTG anti-collision protocols: Fast SWITCH-OFF, SLOW-DOWN, and...
