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THEORY OF OPERATION
The FCTN-MD09-XXX decoder module combines the popular Linx LC series
receiver with a decoder IC and RA series antenna in a convenient through-hole
package.
When transmitted data is received, the data is presented to the
decoder. The decoder detects the logic states of the DIP switch address lines. If
these match with the address settings of the transmitter, the decoders output(s)
are set to replicate the state of the transmitter’s data lines.
OUTPUT PIN CONSIDERATIONS
The output pins will normally require buffering due to their low sink or source
current capability. The external addition of a transistor or other buffer is
recommended to provide the appropriate sink or source current for devices such
as relays, LED’s or motors.
POWER SUPPLY REQUIREMENTS
The receiver module requires a clean, we l l -
regulated power source. While it is prefe ra bl e
to power the unit from a battery, the unit can
also be operated from a power supply as long
as noise and ‘ h a s h ’ is less than 20 m V. I n
cases where the quality of supply power is
poor the module's supply line should have a
filter such as that show n .
LAYOUT CONSIDERATIONS
A 1/4 wave antenna such as that employed on the FCTN-MD09XXX utilizes
groundplane as the antenna's counterpoise. In order to achieve the best range
and uniformity, the designer should provide an additional external groundplane.
This can be accomplished in several ways. A metal enclosure through which the
antenna protrudes can serve as an excellent groundplane, or a ground fill on the
product’s PC board will generally suffice.
Decoder Pinouts
Pin#
Pin#
1
Address 6
Address 5 20
2
Address 7
Address 4 19
3
Address 8
Address 3 18
4
Data 0
Address 2 17
5
VCC
Address 1 16
6
Data 5
Address 0 15
7
Data 4
Data 6 14
8
Data 3
Data 7 13
9
Data 2
Valid TX 12
10
Data 1
GND 11
Suggested supply filter
ELECTRICAL SPECIFICATIONS
Min.
Typ.
Max.
Units
Operating Voltage
4.0
5
5.2
VDC
Current Continuous
-
9
10
mA
Receive Frequency
*315, 418, 433.92
MHz
Sensitivity@10-5BER
-92
-95
Output Drive Current
VOH=0.9vcc
.6
1.2
mA
(sink or source)
* Model Dependent
Summary of Contents for FCTN-MD09 Series
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