rx2-433-40-5v Radiometrix Ltd, rx2-433-40-5v Datasheet - Page 2

• Manufacturer Part Number: rx2-433-40-5v
• Description: The Tx2 And Rx2 Data Link Modules Are A Miniature Pcb Mounting Uhf Radio Transmitter And Receiver Pair Which Enable The Simple Implementation Of A Data Link At Upto 160 Kbit/s At Distances Upto 75 Metres Inbuilding And 300 Metres Open Ground.
• Manufacturer: Radiometrix Ltd

Functional description:
The TX2 transmitter module is a two stage, SAW controlled FM transmitter operating between 2V and
6V and is available in 433.92MHz. The TX2 module is type approved to EN 300 220-3 for European use
and delivers nominally +9dBm from a 5V supply at 12mA. The module measures 32 x 12 x 3.8 mm.
The RX2 module is a double conversion FM superhet receiver capable of handling date rates of up to
160kbps. The SIL style RX2 receiver measures 48 x 17.5 x 4.5 mm. It will operate from a supply of 3-6V
and draws 14mA when receiving. A fast-acting carrier detect and a power-up enable time of less than
1ms. This allows effective duty cycle power saving and a -107 dBm sensitivity. This combined with a
SAW front-end filter results in an excellent RF performance and EMC conformance.
TX2 transmitter:
Vcc
+ve supply pin. The module will generate RF when the Vcc supply is present. Maximum ripple content
0.1V
0V
Supply ground connection, connected to pin 1 and screen.
TXD
This DC coupled modulation input will accept either serial digital data ( 0V to Vcc levels) or high level
linear signals. Input impedance is 100k .
Radiometrix Ltd., TX2 & RX2 Data Sheet
Pin description:
RF GND
RF ground pin, internally connected to the
module screen and pin 4 (0V). This pin should
be connected to the RF return path (e.g. coax
braid, main PCB ground plane etc.)
RF out
50
isolated internally. (see antenna section for
suggested antenna/feeds).
P-P
RF output to the antenna, it is DC
. A 100nF de-coupling ceramic capacitor is suggested.
(pin 3)
(pin 4)
(pin 5)
(pin 1)
(pin 2)
+10 dBm @ 5V
433.92MHz
RF out (2)
RF gnd (1)
433 MHz band
pass filter
Fig. 1: TX2 block diagram
buffer
SAW-stabilised
oscillator
Fig.2: physical dimensions
100 kHz
2 order LPF
nd
100K
0 VOLT (4)
Vcc (3)
TXD (5)
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