FM Radio Transmitter & Receiver Modules
T5 / R5
Connection Diagram
T5
R 5
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 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.
RF OUT (pin2)
50Ω RF antenna output. To achieve best results
the antenna impedance must match that of the
module.
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.
V
CC (pin 3)
+Ve supply pin (3.0 to 9.0 volts). The module will
generate RF when VCC is present. It is strongly
recommended that a 100nF capacitor decouples
the supply rail as close as possible to this pin.
GND (pin 4)
Connect to power supply ground.
GND (pin 4)
Supply and data ground connection, connected to
pin 1.
V
CC (pin 5)
+Ve supply pin. Operation from a 5V supply able
to source6mA at less than Vp-p ripple.
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.
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.
Ordering Information:
Part No
Description
Tx 433.92MHz 9v 20Kbps
Tx 433.92MHz 5v 128Kbps
Part No
Description
T5-434-9-20
T5-434-5V
R5-434-5-20
Rx 433.92MHz 20Kbps
R5-434-5-20B Rx 433.92MHz 20Kbps ‘B part’
R5-434-5-50 Rx 433.92MHz 5V 50Kbps
R5-434-5-50B Rx 433.92MHz 5V 50Kbps ‘B part’
T5-434-5-20B Tx 433.92MHz 5v 20Kbps ‘B part’
T5-434-3V Tx 433.92MHz 3v 50Kbps
T5-434-3-20B Tx 433.92MHz 3v 20Kbps ‘B part’
R5-434-5-128
Rx 433.92MHz 5V 128Kbps
DS305-8
Nov ‘05
©2005 REG No 277 4001, England.
Page 2
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