LMR1-173-5 RADIOMETRIX, LMR1-173-5 Datasheet - Page 3

• Manufacturer Part Number: LMR1-173-5
• Description: RECEIVER, 173.20-173.325MHZ
• Manufacturer: RADIOMETRIX

Specifications of LMR1-173-5

• Rohs Compliant: YES

Figure 3: LMT1 footpint (top view)
Pin description – LMT1
Notes:
Radiometrix Ltd
Pin
1a
2a
3a
4a
5a
1b
2b
3b
4b
5b
1. Serial programming is by an inverted, CMOS logic level, 2400 baud RS232 datastream applied to
2. Channel select inputs have pullups (50k ) to 3v internal rail. Do not exceed 3V logic levels on this
3. Channel select inputs are active low
4. TXE has a 100k
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
7. In the 'off' state a PIN switch open circuits the RF output pin. There are no 'off' state spuri.
8. Unit will operate (with marginally reduced specifications and lower (6-8mW) output power) from a
9. 100mW versions should not be run continuously from supply voltages > 9v
10. Phase Modulation (-PM) version LMT1: 2.6V peak-to-peak level 2100Hz sinewave tone via an
the P0 pin.
port.
family
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.
external 680pF series capacitor will produce FM deviation of 4.2kHz.
The external 680pF series capacitor on LMT1 TXD input provides a defined 6dB per octave pre
emphasis response, to mimic the behavior of a Phase Modulated transmitter.
GND
RF
LMT
Name
Vcc
0V
TXE
TXD
No pin
P0/PGM
P1
P2
P3
No pin
TXD
pullup to Vcc
680pF
Parallel Channel select
Parallel Channel select
Parallel Channel select MSB
Function
3.1 – 15V power supply (10mW)
4.1V – 15V power supply (100mW)
Ground
Transmit Enable (active low)
DC coupled input for 3V CMOS logic. R
See note 10 below for phase modulation (–PM) version
Not present in LMT1
Parallel Channel select LSB
Serial frequency programming / configuration
Not present in LMT1
2.6V
pk-pk
LMT1/LMR1 Data Sheet
2100Hz
in
=47k
1
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