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XR18W753
SINGLE CHIP 868MHZ TO 956MHZ RF TRANSCEIVER
PIN DESCRIPTIONS
REV. 1.0.0
N AME
AGND
AVDD19
AGND
AVDD19
RFCM1
P IN
1
2
3
4
5
T YPE
Ground
Power I
Ground
Power I
Analog O
D ESCRIPTION
Analog ground for IF part of RX and BB part of TX
Analog VDD (1.9V ± 0.1V) for IF part of RX and BB part of TX.
Analog ground for RX frontend and PA
Analog VDD (1.9V ± 0.1V) for LNA and PA.
Common Mode voltage output for matching network.
Voltage output TX: 1.9V RX: ≈ 170mV
RFIN+
RFIN-
RFCM2
6
7
8
Analog I/O
Analog I/O
Analog O
Differential RF signals
Common Mode voltage output for matching network.
Voltage output TX: 1.9V RX: ≈ 170mV
AVDD19
AGND
AVDD
AGND
R1-
R1+
AVDD19
AGND
VDD_VCO
AGND
ATI+
ATI-
ATO+
ATO-
DGND
TEST0
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Power I
Ground
Power I
Ground
Analog I/O
Power I
Ground
Analog O
Ground
Analog I
Analog I
Analog O
Analog O
Ground
Digital I
Analog VDD (1.9V ± 0.1V) for LNA and PA.
Analog ground for RX frontend and PA
Analog VDD (1.9V ± 0.1V) for LNA and PA.
Analog ground for IF part of RX and BB part of TX.
External resistor to fix PA power. 470 ohm resistor connected between
R1- and R1+ is recommended.
Analog VDD (1.9V ± 0.1V) for synthesizer.
Analog ground for synthesizer.
VDD of VCO. VDD = 1.9V ± 0.1V (for decoupling).
Analog ground for VCO.
Analog Test Input
Analog Test Input
Analog Test Output
Analog Test Output
Digital ground
Factory Test Mode. For normal operation, this pin should be connected
to GND.
SCL
SDA
A0
A1
IRQ#
TEST1
25
26
27
28
29
30
Digital OD
DigitaI OD
Digital I
Digital I
Digital O
Digital I
Open-drain I2C serial clock
Open-drain I2C serial data
I2C Address bit-0
I2C Address bit-1
Interrupt output (active low, open-drain).
Factory Test Mode. For normal operation, this pin should be connected
to GND.
4
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