TXL2 ETC2 [List of Unclassifed Manufacturers], TXL2 Datasheet - Page 3

• Manufacturer Part Number: TXL2
• Description: UHF Multi Channel Transparent Data Link TX/RX
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

TXL2 Pin description
Notes:
Radiometrix Ltd
Pin
1
2
3
4
5
6
7
8
1.
2.
3.
4.
5.
6.
7.
TEST has 47K pullup to Vcc. TXD has none. EN has a 47K pulldown
Vcc must be a 5v regulated supply (4.75 - 5.25v)
Pinout is similar to TX1H, with the addition of pin 8 (located 7.62mm on from pin 7)
TXD is inverted RS232 at 5v cmos levels. To connect to a true RS232 device, inverting a level shifter 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 TXL2 provides transmit side of a simplex link, but 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. There is no 'transmit enable' pin.
This unit is compatible with the RXL2 receiver and the TDL2A transceiver
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 default channel=0, 433.925MHz)
Name
RF GND
RF out
RF GND
EN
Vcc
GND
TXD
TEST/SETUP
18mm
5V regulated power supply (4.75 – 5.25V)
Function
RF ground
50 RF output to the antenna
RF ground
Pull high to enable module (may be tied to Vcc)
Supply ground
Inverted RS232 input (5V CMOS logic, No pullup)
Pull low to enter test/setup mode (5V CMOS logic, Pullup to 5V)
1
pin spacing 2.54mm (0.1")
2
8 holes of 0.7mm dia.
Figure 3: TXL2 footprint
3
15.24mm (0.6")
TXL2
42mm
TXL2/RXL2 Data Sheet
4
5
6
7
0.3"
8
1 = RF gnd
2 = RF out
3 = RF gnd
4 = En
5 = Vcc
6 = GND
7 = TXD
8 = SETUP
7mm
page 3