CYW43362
Figure 5. Recommended Circuit to Use with an External Dedicated TCXO
1000 pF
TCXO
OSCIN
NC
OSCOUT
WRF_TCXO_IN
WRF_TCXO_VDD3P3
Figure 6. Recommended Circuit to Use with an External Shared TCXO
To other devices
TCXO
WRF_TCXO_IN
Connect to a supply (1.7V to 3.3V)
that is powered up or down with the
external TCXO clock.
WRF_TCXO_VDD3P3
OSCIN
OSCOUT
NC
Table 3. Crystal Oscillator and External Clock Requirements and Performance
Crystal
External Frequency
Reference
Parameter
Conditions/Notes
Min
Typ
Max
Min
Typ
Max
Units
Between 12 MHz and 52 MHza
Frequency
–
Crystal load capacitance
ESR
–
–
–
12
–
–
pF
Ω
–
60
Input Impedance (OSCIN)b
Resistive
30k
–
100k
–
Ω
Capacitive
–
7.5
–
pF
Ω
Input Impedance
(WRF_TCXO_IN)
Resistive
30k
–
100k
Capacitive
–
–
4
pF
mVp-p
OSCIN input voltage
AC-coupled analog signal
400
1200
OSCIN input low level
OSCIN input high level
DC-coupled digital signal
DC-coupled digital signal
0
–
–
–
0.2
V
1.0
400
1.36
V
DC-coupled analog signalc
WRF_TCXO_IN input
voltage
TCXO_
VDDd
mVp-p
Frequency tolerance
Initial + over temperature
–
–20
–
20
–20
–
20
ppm
Document No. 002-14779 Rev. *G
Page 11 of 60
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