CX-49G-006.000-A0248 AVX Corporation, CX-49G-006.000-A0248 Datasheet - Page 18

• Manufacturer Part Number: CX-49G-006.000-A0248
• Description: Crystals 6KHZ
• Manufacturer: AVX Corporation
• Series: CX49Gr

Specifications of CX-49G-006.000-A0248

• Tolerance: 50 PPM
• Termination Style: SMD/SMT
• Operating Temperature Range: - 10 C to + 70 C
• Dimensions: 4.8 mm W x 12.3 mm L x 4.5 mm H
• Mounting Style: SMD/SMT
• Frequency: 6 KHz
• Frequency Stability: 50 PPM
• Load Capacitance: 12 pF
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(4) Items calculated by equivalent constants and load capacitance
2. Oscillation circuit and crystal unit
(1) Equivalent circuit of oscillation circuit and oscillation conditions
f
f
f
R
C
Q : Quality factor
The equation
The equation
s
p
L
A simplified equivalent circuit is shown below.
: Series resonance frequency
: Parallel resonance frequency
: Capacitance ratio
L
L
Crystal unit
: Load resonance frequency
as
larger as
: Load resistance
: Load capacitance
C
L
becomes smaller.
C
L
f
R
becomes smaller.
L
L
shows that
shows the change in impedance with a load capacitance connected. The impedance of crystal unit becomes
Oscillation circuit
– R
C
f
L
L
varies as load capacitance
Q
R
C
f
f
f
p
s
L
L
L
Crystal unit
R
X
f
2
2
C
C
2
R
s
C
L
L
2
0
1
1
1
2 (C
1
R
L
L1 C1
f
1
1
s
1
(f
1
C
C
L
C
C
L
0
0
0
C
/f
1
0
L
1
1
C
C
C
s
) 1
2
1
L
1
)
2
C
1
Oscillation circuit
L
f
C
s
1
connected to the crystal unit changes and that
0
C
1
– R
R
C
1
L
= – X
C
C
– R : Negative resistance
X
– X
R
L
L
L
C
: Load capacitance
: Reactance of crystal unit
: Reactance of oscillation circuit
: Load resonance resistance
Handling Notes
f
L
becomes larger.