LC and LR Transmitter
Module Comparison
Linx Technologies’ new LR Series transmitter offers more stable performance over various
antenna loads and a higher data rate in the same package as the LC Series transmitter, but
the pin-out is slightly different. Pin 4 is the Level Adjust pin for both modules, but this gets
connected to ground on the LC and to Vcc on the LR. Pin 8 is ground on the LC and is
Power Down for the LR and should be connected to Vcc to activate the module. All other
pins are the same for both modules. For data sheets and user manuals, please see the Linx
website at www.linxtechnologies.com.
Pin-out Comparison
Specifications Comparison Chart
LC
Parameter
Supply Voltage (V)
Supply Current (mA) †
50% Duty Cycle
Logic High
Logic Low
Sleep Current (A)
Transmit Frequency Range (MHz)
TXM-315-L*
TXM-418-L*
TXM-433-L*
Data Bandwidth (bps)
Center Frequency Accuracy (kHz)
Output Power (dBm) †
Harmonic Emissions (dBc)
Output Power Control Range (dBm)
TXM-xxx-LC
Min
Typ
Max
Min
Typ
Max
2.7
—
5.2
2.1
3.0
3.6
—
—
—
—
1.5
3
0
—
—
6
—
1.5
—
—
—
—
3.4
5.1
1.8
0.005
—
—
—
—
—
—
—
100
-75
-4
—
-7
315
418
433.92
—
—
0
—
—
—
—
—
5,000
+75
+4
-36
0
—
—
—
DC
-50
-4
—
-80
315
418
433.92
—
—
0
—
—
—
—
—
10,000
+50
+4
-36
+10
—
+70
—
-40
—
—
0.03
+85
—
30
Modulation Delay (Sec)
o
Operating Temperature Range ( C)
-30
—
† LC = 430Ω resistor on LADJ, LR = 750Ω resistor on LADJ
TXM-xxx-LR
PCB Footprint
Package Comparison
TXM-xxx-LC
LR
TXM-xxx-LR
TXM-xxx-LC
TXM-xxx-LR
LR Series Part Numbers
PART #
DESCRIPTION
TXM-315-LR
TXM-418-LR
Transmitter 315MHz
Transmitter 418MHz
TXM-433-LR
Transmitter 433MHz
159 ORT LANE MERLIN, OR 97532 PHONE: (541) 471-6256 FAX: (541) 471-6251
WWW.LINXTECHNOLOGIES.COM
Rev: 2/11/2010