LR Series RF Transmitter and Receiver
Modules
Revised 3/20/14
LR Series RF modules are ideal for the wireless transfer of serial data, remote
control, and command information in the favorable 260-470MHz band. Thanks
to advanced synthesized architectures, the RF transmitter and receiver form a
reliable wireless link capable of transferring data at rates of up to 10,000bps
over distances of up to 1.5 miles (2,500m) depending on implementation.
The LR Series consists of separate single channel On-Off Key (OOK) RF
transmitter and RF receiver. There is no processor or protocol embedded inside
the modules, so no configuration or programming is required. The modules
contain just the physical radios, so all protocol functions are handled outside
the module. This allows the designer to create a system that is specifically
tuned for the application, with no extra overhead, power consumption or cost
above what is absolutely necessary.
High Performance: The modules have a crystal-controlled synthesized
architecture to give them high stability over time and temperature. This gives
the modules great range and reliability.
Designed for Regulatory Compliance: The LR Series is offered in the 260 to
470MHz band. This band is allocated for remote control applications and short
range data transfers. This includes 433.92MHz, which is a frequency that is
allowed in many countries. This gives the manufacturer the option to build one
product and sell it around the world.
Small Size: At 0.36" x 0.50" (9.14mm x 12.7mm) and 0.812 x 0.63” (20.6mm
x 16.0mm) the modules are small enough to fit into most handheld products.
No Tuning: The modules are matched to 50-ohms and fully tested, so no
tuning or external RF components are required.
Low Power: Linx designed the LR Series with battery-powered applications
in mind, so its power consumption has been highly optimized. A power down
features give the designer complete control over the module.
Simple Implementation: The data presented to the transmitter is used to
directly modulate the carrier. There is no microcontroller or registers to program
or configure. Simply input the digital data and it is sent.
Transparent Interface: The module has a transparent interface, so the module
does not alter or encode the data in any way. This frees the designer to create
a protocol that is most efficient for the application.
Fast Data Throughput: The LR Series is capable of 10kbps data throughput
for digital data. This allows battery-powered applications to send data quickly
then power down to conserve battery life.
0.125 in
(3.12 mm)
0.630 in
(16mm)
0.812 in
(20.6mm)
LOT RRxxxx
RXM-315-LR
0.360 in
(9.14 mm)
0.500 in
(12.7 mm)
0.130 in
(3.3 mm)
Typ.
TXM-315-LR
LOT RTxxxx
Specifications
Frequency
TXM-315-LR / RXM-315-LR 315MHz
TXM-418-LR / RXM-418-LR 418MHz
TXM-433-LR / RXM-433-LR 433.92MHz
Operating Voltage
TXM-***-LR 2.1 to 3.6VDC
RXM-***-LR 2.7 to 3.6VDC
TXM-***-LR Supply Current @
0dBm
5.1mA typical
TXM-***-LR Supply Current @
Max Power
8.5mA typical
RXM-***-LR Supply Current 6mA typical
Power Down Current
TXM-***-LR 5nA typical
RXM-***-LR 28µA typical
TX Output Power 10dBm max.
RX Sensitivity –112dBm typ.
Data Rate 0.1 to 10kbps
Operating Temperature Range
TXM-***-LR –40 to +85°C
RXM-***-LR –40 to +70°C
Typical Application Circuits
The circuits below show the LR Series modules connected to the MS Series encoder and decoder for a basic remote control
application.
Transmitter Typical Application Circuit
Receiver Typical Application Circuit
LR Series RF Transmitter and Receiver Modules
159 Ort Lane, Merlin, OR, US 97532
Phone: +1 541 471 6256
Fax: +1 541 471 6251
www.linxtechnologies.com
2.7k
GND
1
DATA IN
2
GND
3
IADJ/VCC
4
RF OUT
5
GND
6
VCC
7
PDN
8
TXM-xxx-LR
100k
100k
220
100k
100k
100k
100k
100k
100k
100k
LICAL-ENC-MS001
D6
D7
SEL_BAUD0
SEL_BAUD1
GND
GND
GND
TX_CNTL
DATA_OUT
MODE_IND
D5
D4
D3
D2
VCC
VCC
D1
D0
SEND
CREATE_ADDR
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
VCC
VCC
DATA
DATA
GND
GND
VCC
NC
1
NC
2
NC
3
GND
4
VCC
5
PDN
6
RSSI
7
DATA
8
NC
9
NC
10
NC
11
NC
12
NC
13
NC
14
GND
15
ANT
16
RXM-xxx-LR
220
100k
D6
D7
SEL_BAUD0
SEL_BAUD1
GND
GND
LATCH
RX_CNTL
TX_ID
MODE_IND
D5
D4
D3
D2
VCC
VCC
D1
D0
DATA_IN
LEARN
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
LICAL-DEC-MS001
VCC
GND
GND
VCC
2.2k
10k
VCC
RELAY
SWITCHED
OUTPUT
GND
Applications
• Remote control
• Keyless entry
• Garage/gate openers
• Lighting control
• Medical monitoring/call systems
• Remote industrial monitoring
• Periodic data transfer
• Home/industrial automation
• Fire/security alarms
• Remote status/position sensing
• Long-range RFID
• Wire elimination
Ordering Information
Part Number Description
TXM-315-LR 315MHz Transmitter
TXM-418-LR 418MHz Transmitter
TXM-433-LR 433MHz Transmitter
RXM-315-LR 315MHz Receiver
RXM-418-LR 418MHz Receiver
RXM-433-LR 433MHz Receiver
EVAL-***-LR LR Series Basic Evaluation Kit
*** = 315, 418 (Standard), 433MHz
Receivers are supplied in tubes of 18 pcs.