Holtek HT6220A/HT6221A/HT6222A New Infrared Remote Control Devices

11/19/2009

Following on from the successful release of the HT622x infrared remote control device, Holtek is pleased to announce a new addition to this series with the release of its new HT6220A/HT6221A/HT6222A series devices. With a high degree of functional integration, these new device includes a fully integrated oscillator circuit as well as an internal MOSFET transistor to directly drive an external infrared LED. When compared with traditional remote control devices, these new devices have reduced the demands for external components which include a 455kHz resonator, two capacitors, one transistor and one resistor. Before the remote control is triggered, the devices will remain in their standby mode during which the current consumption will be less than 1uA, thus greatly extending battery life. With a carrier frequency of 38kHz, the devices use PPM modulation to send out 16-bit address and 8-bit data codes through an infrared LED. The HT6220A/HT6221A/HT6222A devices support up to 30/32/64 input keys respectively while the devices also supports 3 dual-key functions.

These new devices can be used in a diverse range of remote control applications such as televisions, setup boxes, DVD players, stereos, small household appliances and so forth. The device are all supplied in wafer, die and package types. The package type includes 16-pin NSOP, 20-pin SOP and 24-pin SOP in which the 20-pin SOP and 24-pin SOP types are pin compatible with the HT622x series that make direct replacement possible without needing to rework the original PCB.

The integrated system oscillator circuit within these new devices have already achieved successful patent applications in Taiwan and the relevant patent certificates have already been issued. Patent applications for other regional areas are now pending.