RX2A-433-10 RADIOMETRIX, RX2A-433-10 Datasheet - Page 2

• Manufacturer Part Number: RX2A-433-10
• Description: RECEIVER, 433.92MHZ
• Manufacturer: RADIOMETRIX

Pin description:
RF OUT
50 RF output to the antenna. Internally DC-
isolated. See antenna section of apps notes for
details of suitable antennas.
RF GND
RF ground, internally connected to the module
screen and pin 3 (0V). This pin should be
directly connected to the RF return path - e.g.
coax braid, main PCB ground plane etc.
0V
DC supply ground. Internally connected to pin
2 and module screen.
Functional and operational description
The KTX2 transmitter module is a crystal based PLL controlled FM code-hopping transmitter with a pre-
programmed Electronic Serial Number (ESN), operating between 3V and 6V supply, at 433.92MHz.
KTX2 is designed to meet or exceed EN 300 220-3 standards for European use and delivers nominally
+3dBm at 8mA (for 5V supply). The module measures 36.2 x 15.2 x 4.5 mm.
The module is very easy to use: there are no modulation input or transmitter-enable pins. The activation
of any combination of the four function lines (S0 – S3) causes a data transmission, part of which is the
status of S0 – S3, i.e. the function code. In this way, up to 15 different control combinations can be sent
from one module. Simple pushbuttons can be connected directly between S0 – S3 and Vcc if desired. The
module will transmit repeatedly whilst any of the function lines is held high for up to 30 seconds (approx.),
when a power-saving time-out feature is activated.
Vcc
+3V to +6V DC supply. Max ripple content 0.1V
S0
Input (0) – activate high (>0.55Vcc – Vcc) to cause a transmission.
S1
Input (1) – activate high (>0.55Vcc – Vcc) to cause a transmission.
S2
Input (2) – activate high (>0.55Vcc – Vcc) to cause a transmission.
S3
Input (3) – activate high (>0.55Vcc – Vcc) to cause a transmission.
Internal Use (pin 9)
Modulation (Data). This pin is connected to the modulation input of the Transmitter, therefore do not
connect anything to this pin during operation of the module.
Radiometrix Ltd, KTX2 Data Sheet
1
RF out
2
RF gnd
433.92 MHz
band pass
filter
(pin 1)
(pin 2)
(pin 3)
(pin 4)
(pin 5)
(pin 6)
(pin 7)
(pin 8)
buffer
V C O
Fig. 2: KTX2 block diagram
P-P
Loop
Filter
. Decoupling is not generally required.
32
15.2
mm
9 holes, 0.7 mm dia, pin spacing 2.54 mm
KTX2
1
2
Fig 3: KTX2 physical dimensions
15.24 mm
regulator
supply
osc
ref
36.2 mm
3
4
5
Radiometrix
6
Encoder
7
8
9
3 - 6Vcc
S0
S1
S2
S3
15.7
mm
1 = RF OUT
2 = RF GND
3 = 0V
4 = Vcc
5 = S0
6 = S1
7 = S2
8 = S3
9 = Internal Use
0V
PCB level
3
4
5
6
7
8
9
page 2
4.5 mm