SOLUTION
FOR SHORT-RANGE RF APPLICATIONS
A
complete system solution for short-range, unidirectional
RF communication consists of three microcontrollers
with integrated transmitters and two receivers. Several
products supporting frequency bands ranging from 260
to 930 MHz are now available. By combining the rfPIC12F675
microcontroller/transmitter with either the rfRXD0420
receiver or rfRXD0920 receiver, users can easily create
a wireless unidirectional communication link for embedded-control
applications. The receivers also can be combined with
rfPIC devices and KEELOQ encoders to create remote sense
and control applications.
Available
in a 32-pin low-profile quad-flat pack (LQFP), the rfRXD0420
and rfRXD0920 single-conversion super-heterodyne UHF
RF receivers support frequency bands of 300 to 450 MHz
and 850 to 930 MHz, respectively. The devices offer
a maximum data rate of 80 kbps, a standby supply current
of 100 nA, and operate over a voltage range of 2.5 to
5.5 V. The active supply currents for the rfRXD0420
is 6.5 to 8.2 mA depending on the low-noise amplifier
(LNA) setting, and 7.5 to 9.2 mA for the rfRXD0920.
The
rfPIC12F675 is a 20-pin microcontroller that feature
an integrated UHF RF transmitter. Output power for the
transmitter section is specified at 6 dBm for increased
range, and it is available in three frequency ranges:
260 to 350 MHz (rfPIC12F675K), 390 to 450 MHz (rfPIC12F675F),
and 850 to 930 MHz (rfPIC12F675H) with a maximum data
rate of 40 kbps. A standby supply current of 100 nA
and operating voltage range of 2 to 5.5 V make the device
suitable for low-power battery-operated applications.
The microcontroller features a 14-bit instruction set
with 1.8 KB of flash program memory, 64 bytes of RAM,
and 128 bytes of EEPROM for nonvolatile storage. Additional
features include an analog comparator and four channels
of 10-bit ADC, making it easy to interface to a sensor
for wireless sensor applications.
Pricing
in 10,000-unit quantities is $2.55 each for the
rfRXD0420 and rfRXD0920, and $2.03 for the rfPIC12F675.
Microchip
Technology, Inc.
(408)
792-7200
www.microchip.com
