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S2-LPS Datasheet(PDF) 8 Page - STMicroelectronics

Part # S2-LPS
Description  Ultra-low power, high performance, sub-1 GHz transceiver
PDF  73 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

S2-LPS Datasheet(HTML) 8 Page - STMicroelectronics

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2.1
Pin diagram
Figure 5. Pin diagram, QFN24 (4x4 mm) package
S2-LPSQTR
VDD SMPS
SMPS1
SMPS2
XOUT
XIN
SDN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
SCLK
SDI
SDO
VDD DIG/RX
RX+
RX-
25 - GND
25 - GND
2.2
Pin description
Table 2. Pinout
Number
Pin name
Pin type
Description
1
VDD SMPS
Power
1.8 V to 3.6 V analog power supply for SMPS only.
2
SMPS1
Analog out
1.1 V to 1.8 V SMPS regulator output to be externally filtered
3
SMPS2
Analog in
1.1 V to 1.8 V SMPS voltage input after LC filtering applied to SMPS1 output
4
XOUT
Analog out
Crystal oscillator output. Connect to an external crystal or leave floating if driving
the XIN pin with an external clock source
5
XIN
Analog in
Crystal oscillator input. Connect to an external crystal or to an external clock
source. If using an external clock source, DC coupling with a minimum 0.2 VDC
level is recommended and minimum AC amplitude of 400 mVpp (however, the
instantaneous level at input cannot exceed the 0 – 1.4 V range)
6
SDN
Digital in
Shutdown input pin. SDN should be = ‘0’ in all modes, except shutdown mode
7
VDD ANA/
SYNTH
Power
1.8 V to 3.6 V power
8
VR SYNTH
Analog in/out
1.2 V SYNTH-LDO output for decoupling
9
VREF VCO
Analog out
1.2 V VCO-LDO band-gap reference voltage decoupling
10
VDD VCO/TX
Power
1.8 V to 3.6 V power supply
11
TX
RF output
RF output signal
S2-LPS
Pin diagram
DS13831 - Rev 1
page 8/73



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