Detailed Product Description

Description

GK4001 is a contactless transponder integration circuit chip. The chip that runs batteryless operations receives power and transmits signals through an external coil placed in a magnetic field provided by a corresponding device. 64 bits of data preprogrammed in an EPROM array are sent to the corresponding device repetitively when the chip is in the field range. The serial output data contains a 9-bit header, 40 bits of data, 14 parity bits, and a stop bit. The way to modulate the output data uses Manchester Coding, with a bit rate corresponding to 64 periods of the field frequency. To obtain the chip function, an external coil is required and

in parallel an external capacitor is adjusted

         L=4.05mh,C=390pf

with the coil to form an adequate resonance.

Major applications of the product include contactless ID cards, serial number identification devices, and animal identification transponders.

         Operation frequency at 125 KHz

          64 bits of factory-preprogrammed EPROM array

          On-chip full wave rectifier

         On-chip buffer capacitance and voltage limiter

          RF transmission is unsensitive to metal

          Large operation range

         Very small footprint for easy implementation