H4005

Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction.

The H4005 is a CMOS integrated circuit intented for use in electronic Read Only RF Transponders. The H4005 circuit is powered by an external coil placed in an electromagnetic field, and gets its master clock from the same field via one of the coil terminals. The other coil terminal is affected by the modulator. By turning on and off the modulation current, the chip will send back the 128 bits of information contained in a factory pre-programmed memory array.

The programming of the chip is performed by laser fusing of polysilicon links in order to store a unique code on each chip. Due to the low power consumption of the logic core, no supply buffer capacitor is required. Only an external coil is needed to obtain the chip function in H4005. A parallel resonance capacitor of 75 pF is also integrated.