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TXL2 Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers

Part No. TXL2
Description  UHF Multi Channel Transparent Data Link TX/RX
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Manufacturer  ETC2 [List of Unclassifed Manufacturers]
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TXL2 Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers

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Radiometrix Ltd
TXL2/RXL2 Data Sheet
page 5
7 holes of 0.7mm dia pin spacing 2.54mm (0.1")
12
3
4
5
6
7
47mm
17mm
30.48mm (1.2")
7mm
RXL2
1 = RF in
2 = RF gnd
3 = RSSI/BUSY
4 = 0V
5 = Vcc
6 = AF/
7 = RXD
PGM
RXL2 Pin description
Pin
Name
Function
1
RF in
50
Ω RF input from the antenna
2
RF GND
RF ground
3
RSSI/BUSY S meter or BUSY output
4
0V
Supply ground
5
Vcc
5V regulated power supply (4.75 – 5.25V)
6
AF/PGM
Baseband audio (or PGM in)
7
RXD
Receive Data (Inverted RS232 at 5V CMOS logic level); Input in
PGM mode
Notes:
1.
To enter program mode, the AF/PGM pin must be tied to ground (Vpin below 0.3v: jumper or open collector
recommended). Normally this pin functions as a high impedence (20K) receiver baseband audio output
2.
Vcc must be a 5v regulated supply (4.75 - 5.25v)
3.
Pinout is as RX2A
4.
RXD is inverted RS232 at 5v cmos levels. To connect to a true RS232 device, inverting level shifters must be
used (MAX232 type are ideal, but simple NPN transistor switches with pullups often suffice). With typical
microcontrollers and uarts, direct connection is possible. The same pin is uesd for normal operation Data out,
PGM mode data in, and PGM mode data out.
5.
The RXL2 provides a receive side of a simplex link. Provided no two devices attempt to transmit at one time,
no further restrictions on data transmission need be made, as all transmit timing, valid data identification and
datastream buffering is conducted by the unit.
6.
This unit is compatible with the TXL2 transmitter and the TDL2A transceiver.
7.
A simple addressing structure is included in the datastream. Units may be programmed onto one of eight
addresses (all units are supplied set to default addr=0) and one of five RF channels (supplied default is
channel=0, 433.925MHz)
8.
RSSI pin can be changed to a 'BUSY' (= valid data in FIFO) logic output by a solder blob link on the back of
the pcb, otherwise it functions as a signal strength output (0 - 1.4v)
Figure 5: RXL2 footprint


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