TXE-418-KH Linx Technologies Inc, TXE-418-KH Datasheet - Page 3

• Manufacturer Part Number: TXE-418-KH
• Description: TRANSMITTER RF 418MHZ SMT
• Manufacturer: Linx Technologies Inc
• Series: KHr

Specifications of TXE-418-KH

• Frequency: 418MHz
• Applications: Fire/Security Alarms, Garage Opener, RKE
• Modulation Or Protocol: ASK, OOK
• Power - Output: -4dBm ~ 4dBm
• Current - Transmitting: 1.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.7 V ~ 5.2 V
• Operating Temperature: -30°C ~ 70°C
• Package / Case: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Data Rate - Maximum: -

PIN ASSIGNMENTS
Figure 6: KH Series Transmitter Pinout (Top View)
PIN DESCRIPTIONS
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Pin #
13-22
2, 3,
7-12
23
24
1
4
5
6
GND / LADJ
Name
D0 - D1
A0-A9
GND
GND
ANT
V
TE
CC
module will encode the states of the address and data lines
power level of the transmitter. Connecting to GND will give
receipt of a valid transmission, the receiver / decoder will
Level Adjust. This line can be used to adjust the output
Address Lines. The state of these lines must match the
the highest output, while placing a resistor to GND will
Data Input Lines. When TE goes high, the module will
encode the state of these lines for transmission. Upon
Transmit Enable Line. When this line goes high, the
into a packet and transmit the packet three times.
state of the receiver’s address lines in order for a
10
11
12
1
2
3
4
5
6
7
8
9
replicate these lines on its output lines.
LADJ/GND
D0
D1
GND
VCC
TE
D2
D3
D4
D5
D6
D7
transmission to be accepted.
lower the output level.
GND
50-ohm RF Output
ANT
Description
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
Analog Ground
Supply Voltage
Analog Ground
24
23
22
21
20
19
18
17
16
15
14
13
MODULE DESCRIPTION
Figure 7: KH Series Transmitter Block Diagram
THEORY OF OPERATION
50Ω RF OUT
The KH Series transmitter / encoder module combines a high-performance
Surface Acoustic Wave (SAW) based transmitter with an on-board encoder.
When combined with a Linx KH Series receiver / decoder, a highly reliable RF
link capable of transferring control or command data over line-of-sight distances
in excess of 300 feet is formed. The module accepts up to 8 parallel inputs, such
as switches or contact closures, and provides ten tri-state address lines for
security and creation of 59,049 (310) unique transmitter / receiver relationships.
The KH’s compact surface-mount package integrates easily into existing designs
and is friendly to hand production or automated assembly.
The KH Series transmitter operation is straightforward. When the Transmit
Enable (TE) line is taken high, the on-board encoder IC is activated. The encoder
detects the logic states of the data and address lines. These states are formatted
into a 3-word transmission, which continues until the TE line is taken low. The
encoder creates a serial data packet that is used to modulate the transmitter.
The transmitter section is based on a simple, but highly-optimized, architecture
that achieves a high fundamental output power with low harmonic content. This
ensures that most approval standards can be met without external filter
components. The KH Series transmitter is exceptionally stable over variations in
time, temperature, and physical shock as a result of the precision SAW device
that is incorporated as the frequency reference.
The transmitted signal may be received by any Linx KH Series receiver / decoder
module or Linx LC or LR Series receiver combined with the appropriate decoder
IC. Once data is received, it is decoded using a decoder IC or custom
microcontroller. The transmitted address bits are checked against the address
settings of the receiving device. If a match is confirmed, the decoder’s outputs
are set to replicate the transmitter’s inputs.
(ANT)
Output Isolation
Keyed Output
& Filter
RF STAGE
RF Amplifier
Oscillator
SAW
TX Enable
ENCODER STAGE
TRI-Detect
Counter
Divider
Address Inputs
A0-A9
OSC
Parallel
D0-D7
Inputs
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