FM Radio Transmitter & Receiver Modules
Connection Diagram
T5 / R5
T5
R5
1
2
3
4
5
1 2
3 4 5 6 7
Figure 1: Transmitter
Figure 2: Receiver
Pin Descriptions:
RF GND
(pin 1)
RF ground pin, internally connected to pin 4 (0V).
This pin should ideally be connected to the
nearest ground plane (e.g. coax braid, main PCB
ground plane etc.)
RF OUT
(pin2)
50Ω RF antenna output. To achieve best results
the antenna impedance must match that of the
module.
V
CC
(pin 3)
+Ve supply pin (3.0 to 9.0 volts). The module will
generate RF when V
CC
is present. It is strongly
recommended that a 100nF capacitor decouples
the supply rail as close as possible to this pin.
GND
(pin 4)
Supply and data ground connection, connected to
pin 1.
Data IN
(pin 5)
This input has an impedance of 47KΩ and should
ideally be driven by a CMOS logic drive or
compatible. The drive circuitry should be supplied
with the same supply voltage as the Tx module.
Ordering Information:
RF IN (pin 1)
50Ω RF input from antenna, connect using
shortest possible route. This input is isolated from
the internal circuit using the air gap of the front
end SAW RF filter
RF GND (pin 2)
RF ground connection, preferable connected to a
solid plane.
RSSI (pin 3)
The Received Signal Strength Indicator provides a
DC output voltage proportional to the RF input
signal. The amplitude of the RSSI voltage
increases with increasing RF signal strength.
GND (pin 4)
Connect to power supply ground.
V
CC
(pin 5)
+Ve supply pin. Operation from a 5V supply able
to source6mA at less than V
p-p
ripple.
AF (pin 6)
Audio frequency output.
DATA OUT (pin 7)
CMOS compatible output. This may be used to
drive external decoders. To reduce any noise on
this output ass a Add a 56pF cap from this pin to
GND.
Part No
R5-434-5-20
R5-434-5-20B
R5-434-5-50
R5-434-5-50B
R5-434-5-128
Description
Rx 433.92MHz 20Kbps
Rx 433.92MHz 20Kbps ‘B part’
Rx 433.92MHz 5V 50Kbps
Rx 433.92MHz 5V 50Kbps ‘B part’
Rx 433.92MHz 5V 128Kbps
Part No
T5-434-9-20
T5-434-5V
T5-434-5-20B
T5-434-3V
T5-434-3-20B
Description
Tx 433.92MHz 9v 20Kbps
Tx 433.92MHz 5v 128Kbps
Tx 433.92MHz 5v 20Kbps ‘B part’
Tx 433.92MHz 3v 50Kbps
Tx 433.92MHz 3v 20Kbps ‘B part’
DS305-8
Nov ‘05
©2005
REG No 277 4001, England.
Page 2
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