The IC contains a photodiode, an infrared emitter and CMOS control logic. The TFDU6102 low-power receiver IC supports IrDA at data rates up to 4 Mbit/s (FIR), HP-SIR, Sharp ASK, and carrier-based remote control modes up to 2 MHz. This IC is faster and meets the latest IrDA specification. If this IrDA transceiver is no longer available (it has been officially discontinued), the largely pin- and function-compatible TFDU6102 can be used without any problems. The author has successfully built this circuit many times using the TFDU5102 from Vishay Semiconductors (formerly Telefunken). This is because transceiver ICs are available for the IrDA standard, so only a few passive components have to be added to obtain an operational circuit. As can readily be seen from the schematic diagram, this doesn’t exactly involve a large array of ICs. However, it is not difficult to build a data transmission module and connect it to the corresponding header. Many modern motherboards are equipped with an infrared data interface compliant with the IrDA standard, but this interface not very often used.
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