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SX1223
2
PIN DESCRIPTION
Pin
Name
I/O
Function
Main analog power supply
1
VDD
-
Max 3.6V in sv1-mode
Max 2.5V in sv2-mode
2
3
4
5
6
7
8
9
10
VSSP
VDDP
RFOUT
VSSP
PTATBIAS/PAC
XTB
XTA
VDDD
VSSD
-
-
OUT
-
IN/OUT
IN/OUT
IN/OUT
-
-
PA ground
In sv1-mode: PA LDO output, capacitor needed
In sv2-mode: PA power supply, max 2.5 V
RF output
PA ground
PTAT source bias resistor / PA start-up control capacitor
Crystal oscillator pin & input for external reference
Crystal oscillator pin
In sv1-mode: Digital LDO output, capacitor needed
In sv2-mode: Digital power supply, max 2.5V
Digital ground
Main digital power supply
11
VDD
-
Max 3.6V in sv1-mode
Max 2.5V in sv2-mode
12
13
14
15
16
17
18
19
20
21
22
23
24
LD
CLKOUT
DCLK
DATAIN
SCK
EN
SI
SO
CPOUT
VARIN
VSSF
VDDF
CIBIAS
OUT
OUT
OUT
IN
IN
IN
IN
OUT
OUT
IN
-
-
OUT
Lock detect output
Output clock (1 MHz)
Data clock output
Data input
3-wire interface clock input
Enable signal for the 3-wire interface
3-wire interface data input
3-wire interface data output
PLL charge pump output
VCO varactor input
Analog ground
In sv1-mode: Analog LDO output, capacitor needed
In sv2-mode: Analog power supply max 2.5 V
CI source bias resistor
Note: Thermal Pad on the bottom of the package must be connected to ground.
Thermal
Pad
24
? Semtech 2007
bottom view
4
1
www.semtech.com
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