AN1833 Freescale Semiconductor / Motorola, AN1833 Datasheet - Page 29

• Manufacturer Part Number: AN1833
• Description: A Low-Power Wireless Remote Control Transmitter and Receiver
• Manufacturer: Freescale Semiconductor / Motorola

Conclusions
AN1833
MOTOROLA
The MC13144 and MC13158 are excellent solutions for a stable OOK
receiver to fit part 15 applications such as keyless entry and security
systems where high reliability and performance is essential. High
performance attributes have been demonstrated and can be
successfully integrated into a low-cost OOK communication system.
The varactor-controlled LC oscillator is capable of tuning over a suitable
frequency range at low-supply voltage. Driving the VCO with the AFC
network provides compensation for expected transmitter carrier drift.
This overcomes the need for an expensive crystal-controlled
transmitter/receiver system. Narrow band filters improve selectivity and
assist in achieving the receiver's low sensitivity of –100 dBm. With only
three ICs and a minimum number of external components, the low-cost
objective is met.
The MC13176 offers a versatile UHF PLL transmitter using few external
components and exceeds the performance criteria needed to adhere to
the FCC regulations. It also fits manufacturing cost goals.
Both RF components interface well with the MC68HC705J1A MCU to
provide more robust and dependable data recovery which ensures error-
free switching of remote devices.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Application Note
Conclusions
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