CX5032GA10000H0QSWZZ KSS [Kyocera Kinseki Corpotation], CX5032GA10000H0QSWZZ Datasheet - Page 23

• Manufacturer Part Number: CX5032GA10000H0QSWZZ
• Description: Crystal Units Surface Mount Type
• Manufacturer: KSS [Kyocera Kinseki Corpotation]

(2) CMOS overtone crystal oscillation circuit
(3) Selection of ICs and circuit constants by frequency bands
(4) Method of selecting circuit constants and functions of elements
This figure shows a standard CMOS inverter crystal oscillation circuit to oscillate a crystal unit using the overtone mode.
*
There are same cases when
C
C
C
L
L
R
L
1
2
1
2
3
1
1
: A coil to adjust load capacitance of the oscillation circuit to a value near the series. A value of several µH is used.
: Forms load capacitance of the circuit together with
: Forms load capacitance of the circuit together with
: Forms load capacitance of the circuit together with
: A bypath capacitor
: A Q dump resistor for
and
so that
of the third overtone frequency. A value of 10 to 22pF is used.
so that L2 comes between the third overtone frequency at which resonance frequency with
of the third overtone frequency. A value of 10 to 22pF is used.
k is used.
Selection of ICs and circuit constants by frequency bands
*1: Necessary for preventing overtone oscillation and must be changed depending on the frequency band or the C
*2: Used to reduce excitation current of the crystal unit. Necessary for stable operation of small-sized crystal units.
*3: The optimum value differs with the values of load capacitance and Rd.
Rf
Rd
Rx
C
R
1
Frequency
, C
Handling Notes
1
might not be used.
C
2
2
IC
comes between the third overtone frequency at which resonance frequency with
*1
*2
*3
3 to 4.9(MHz)
L
1
1500()
L
. As an element for preventing self-excited oscillation, A value of several k to several tens of
1
and
R
Frequency range
1
are matched to the value of load capacitance.
CMOS overtone crystal oscillation circuit
IC
C
C
5 to 6.9(MHz)
1
2
6 to 22(pF)
TC4069UB
TC4SU69F
C
470()
X-tal
1
R
f
= 1M
C
C
C
1
1
,
2
,
,
L
R
C
L
C
L
- 56 -
1
1
1
2
2
1
and
and L1. Prevents fundamental wave oscillation. Shall be selected
and
7 to 9.9(MHz)
0 to 1500
L
L
2
C
2
. Prevents fundamental wave oscillation. Shall be selected
1M
1000pF
0()
1
. A value of approx. 5pF is used.
3
and C
TC74VHCU04
TC7SHU04F
TC7WHU04FU
L
20 to 60(MHz)
2
2
10 to 22pF
3 to 10pF
values.
10 to 19.9(MHz)
TC74HCU04A
TC7SU04F
TC7WU04FU
6 to 15(pF)
0()
C
L
2
2
is to make oscillation and 1/3
is to make oscillation and 1/3
20 to 30(MHz)
TC74VHCU04
TC7SHU04F
TC7WHU04FU
6 to 15(pF)
0()