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MRX-002
UHF AM RECEIVER MODULE
Pin Detail
Pin Number
Pin
DIP Surface Mount
9 1
Name
Ant
Description
This is the receive RF input, internally ac-coupled. Connect this
pin to the receive antenna.
4,5,6,7,8
1,2,3
18
17
16
15
14
13
12
11
10
2,3,4,5,6
7,8,9
10
11
12
13
14
15
16
17
18
Gnd Ground
N/C No Connect
DO Data output pin.
SWEN Controls the operating mode of the receiver. When high, the
receiver is in sweep mode. When low, the module operates as a
conventional single-conversion superheterodyne receiver (fixed
mode) - this is the recommended mode of operation. This pin is
internally pulled-up to VCC.
SEL1 Programs desired Demodulator Filter Bandwidth. This pin is
internally pulled-up to VCC. See Table 1.
SEL0 Programs desired Demodulator Filter Bandwidth. This pin is
internally pulled-up to VCC. See Table 1.
WAKEB Wakeup output (active-low) that indicates detection of an
incoming RF signal. Pin goes low when a constant RF carrier is
detected.
SHUT Shutdown-mode logic-level control input. Pull low to enable the
receiver. Internally pulled-up to VCC.
REG-EN In a regulated module, this pin powers on the module with a 2-
16V supply input. Pulling this pin low disables module. In a non-
regulated module, this is a no connect.
+5V In a regulated module, this is a 5V output from the onboard
regulator when REG-EN is high (2-16V). In a non-regulated
module, this is the 4.75V to 5.5V power supply input.
+VIN In a regulated module, this is the power supply pin of the module.
Input 5-16V to power a regulated module. In a non-regulated
module, this is a no connect.
Table 1
Programmable Bandwidth Configurations
SEL0 SEL1 Sweep Mode (bps) Fixed Mode (bps)
0 0 625 1250
1 0 1250 2500
0 1 2500 5000
1 1 5000 10000
*Note: 1=VCC, 0=GND
Typical Application Schematic
U1
MRX-002
1
2
3
4
5
6
7
8
9
N/C
N/C
N/C
GND
GND
GND
GND
GND
ANT
DO
SWEN
SEL1
SEL0
WAKEB
SHUT
REG-EN
+5V
+VIN
18
17
16
15
14
13
12
11
10
Data Out to MCU
GND
GND
GND
Wake Out to MCU
GND
+2V-16V In
+5V Output
+5V-16V In
MCU
MRX-002, 433.92MHz Fixed, 1250bps Bandwidth
-Page 5-
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