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LMT2-433-5 Datasheet(PDF) 3 Page - Radiometrix Ltd

Part No. LMT2-433-5
Description  UHF Narrow Band FM Low Cost multi channel
Download  11 Pages
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Manufacturer  RADIOMETRIX [Radiometrix Ltd]
Direct Link  http://www.radiometrix.com
Logo RADIOMETRIX - Radiometrix Ltd

LMT2-433-5 Datasheet(HTML) 3 Page - Radiometrix Ltd

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Radiometrix Ltd
LMT2/LMR2 Data Sheet
page 3
Figure 3: LMT2 footpint (top view)
Pin description – LMT2
Pin
Name
Function
1a
Vcc
3.1 – 15V power supply (@ 10mW)
4.1 – 15V power supply (@ 100mW)
2a
0V
Ground
3a
TXE
Transmit Enable (active low)
4a
TXD
DC coupled input for 3V CMOS logic. Rin=47kΩ
5a
No pin
Not present in LMT2
1b
P0/PGM
Parallel Channel select LSB
Serial frequency programming / configuration
1
2b
P1
Parallel Channel select
3b
P2
Parallel Channel select
4b
P3
Parallel Channel select MSB
5b
No pin
Not present in LMT2
Notes:
1.
Serial programming is by an inverted, CMOS logic level, 2400 baud RS232 datastream applied to
the P0 pin.
2.
Channel select inputs have pullups (50kΩ) to 3v internal rail. Do not exceed 3V logic levels on this
port.
3.
Channel select inputs are active low
4.
TXE has a 100kΩ pullup to Vcc
5.
All pins are on an 0.1" grid
6.
The pins 5a/b are not present, but are included in footprint for compatibility with other units in this
family
7.
In the 'off' state a PIN switch open circuits the RF output pin. There are no 'off' state spuri.
8.
10mW unit will operate (with marginally reduced specifications and lower (6-8mW) output power)
from a 3.0V rail. This must be well regulated and without noise or ripple, as in this state the unit's
internal regulator no longer operates, and provides no supply rejection.
9.
100mW versions should not be run continuously from supply voltages > 9v


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