| 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
Operating Configuration
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.
Features
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 |
