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KTX2-433 View Datasheet(PDF) - Radiometrix Ltd

Part Name
Description
Manufacturer
KTX2-433 Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
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.
supply
regulator
4
3 - 6Vcc
1
RF out
433.92 MHz
band pass
filter
buffer
VCO
÷32
φ
ref
osc
Loop
Filter
2
RF gnd
Fig. 2: KTX2 block diagram
S0 5
S1 6
Encoder S2 7
S3 8
9
3
0V
Pin description:
36.2 mm
4.5 mm
RF OUT
(pin 1)
50RF output to the antenna. Internally DC-
isolated. See antenna section of apps notes for
details of suitable antennas.
15.2
mm
KTX2
15.7
mm
Radiometrix
RF GND
(pin 2)
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
(pin 3)
DC supply ground. Internally connected to pin
2 and module screen.
PCB level
15.24 mm
12
3 456 7 89
9 holes, 0.7 mm dia, pin spacing 2.54 mm
Fig 3: KTX2 physical dimensions
1 = RF OUT
2 = RF GND
3 = 0V
4 = Vcc
5 = S0
6 = S1
7 = S2
8 = S3
9 = Internal Use
Vcc
(pin 4)
+3V to +6V DC supply. Max ripple content 0.1VP-P. Decoupling is not generally required.
S0
(pin 5)
Input (0) – activate high (>0.55Vcc – Vcc) to cause a transmission.
S1
(pin 6)
Input (1) – activate high (>0.55Vcc – Vcc) to cause a transmission.
S2
(pin 7)
Input (2) – activate high (>0.55Vcc – Vcc) to cause a transmission.
S3
(pin 8)
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
page 2
 

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