RX2A-433-64 RADIOMETRIX, RX2A-433-64 Datasheet - Page 2

• Manufacturer Part Number: RX2A-433-64
• Description: RECEIVER, UHF, FM, RSSI
• Manufacturer: RADIOMETRIX

Specifications of RX2A-433-64

• Current Rating: 12mA
• Data Rate: 64 Kbps
• External Depth: 4.5mm
• External Length / Height: 48mm
• External Width: 18mm
• Frequency: 433MHz
• Operating Temperature Max: 70°C
• Operating Temperature Min: -20°C
• Range: 300
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional description
The TX2A transmitter module is a crystal based PLL controlled FM transmitter operating between 2.2V
and 16V and is available in 433.92MHz. The TX2A module is type approved to EN 300 220-3 for European
use and delivers nominally +10dBm at 11mA. The module measures 32 x 12 x 3.8 mm.
The RX2A module is a single conversion FM superhet receiver capable of handling data rates of up to
64kbps. It will operate from a supply of 2.7V to 16V and draws 10mA when receiving. The RX2A features
a fast power-up time for effective duty cycle power saving and a signal strength (RSSI) output with 60dB
of range. Full screening and a SAW front-end filter give good immunity to interference. The SIL style
RX2A measures 48 x 17.5 x 4.5 mm excluding the pins.
TX2A transmitter
Vcc
+2.2V to +16V DC supply. Max ripple content 0.1V
0V
DC supply ground. Internally connected to pins 1 & 3 and module screen.
TXD
DC-coupled modulation input. Accepts serial digital data at 0V to 2.5V levels.
See applications notes for suggested drive methods. Input is high impedance (>100k ).
Notes: 1. The 3V and 5V supply variant TX2As intended for direct replacement to our SAW based TX2
Radiometrix Ltd, TX2A/RX2A Data Sheet
Pin description:
RF GND
RF ground, internally connected to the module
screen and pin 6 (0V). These pins should be
directly connected to the RF return path - e.g.
coax braid, main PCB ground plane etc.
RF OUT
50 RF output to the antenna. Internally DC-
isolated. See antenna section of apps notes for
details of suitable antennas.
En
Tx enable. <0.15V shuts down module (current
<1 A). >1.7V enables the transmitter.
Impedance ~1M . Observe slew rate
requirements (see apps notes).
RF out
3
RF gnd
1
2
modules and do not have internal regulator. They also have identical pin out as of TX2, hence lack
pin 3 (GND) and pin 4 (Enable).
2. The TXD input of 3V and 5V versions require serial digital data at 0-Vcc levels. i.e. 0-3V and 0-
5V respectively
433.92 MHz
band pass
filter
(pin 5)
(pin 6)
(pin 7)
(pins 1&3)
(pin 2)
(pin 4)
buffer
V C O
Fig. 2: TX2A block diagram
Loop
Filter
P-P
32
12.0
mm
. Decoupling is not generally required.
TX2A
1 2
7 holes, 0.7 mm dia, pin spacing 2.54 mm
3
Fig 3: TX2A physical dimensions
15.24 mm
32 mm
regulator
Radiometrix
supply
osc
ref
4
5
6
7
35kHz
LPF
12.5
mm
PCB level
7 = TXD
2.2 -- 16V
1 = RF GND
2 = RF OUT
3 = RF GND
4 = En
5 = Vcc
6 = 0V
TXD
En
5
0V
4
7
page 2
6
3.8 mm