The ATA8741 is a highly flexible programmable transmitter containing the AVR microcontroller ATtiny44V and the UHF PLL transmitters in a small QFN24 5 mm x 5 mm package. This device is a member of a transmitter family covering several operating frequency ranges, which has been specifically developed for the demands of RF low-cost data transmission systems with data rates of up to 32 kBit/s. Its primary applications are in the areas of industrial/aftermarket Remote Keyless-Entry (RKE) systems, alarm, telemetering, energy metering systems, home automotion/entertainment and toys. The ATA8741 can be used in the frequency band of f0 = 315 MHz for ASK or FSK data transmission.