CX-49G-006.000-A0248 AVX Corporation, CX-49G-006.000-A0248 Datasheet - Page 17

• 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

For Proper Use of Crystal Units
1. Characteristics of crystal units
(1) Relationship between thickness of crystal blank and oscillation frequency
(2) Examples of specifications for frequency-temperature characteristics
(3) Equivalent electric circuit and equivalent constant of crystal unit
L
C
R : Motional resistance in the equivalent electric circuit
C
±10 10
±50 10
The frequency-temperature characteristics of the AT cut crystal unit are tertiary curves.
The diagram below shows examples of the tertiary curves that pass temperature range and frequency deviation specifications.
The range enclosed by the smaller rectangular satisfies the following specification:
The range enclosed by the larger rectangular satisfies the following specification:
The following equivalent constants are used near the resonance frequency.
The thickness of crystal vibrator of the AT cut crystal unit as described in the previous page differs depending on the overtone
1
1
0
mode.
: Motional inductance in the equivalent electric circuit
: Motional capacitance in the equivalent electric circuit
: Parallel capacitance in the equivalent electric circuit
–10
–20
–30
–40
–50
–60
–70
70
60
50
40
30
20
10
0
AT/Fundamental mode
–70
* These are examples. Required frequency-temperature specifications are determined through
individual consultations.
Cut angle/mode
-6
-6
(-10 to 60: 25˚C)
(-20 to 70: 25˚C)
AT/3’rd O. T
AT/5’th O. T
AT/7’th O. T
overtone
–50
–30
–10
10
Frequency range
In case of calculating the thickness of AT-cut 16MHz
t=1.67/16=0.104(mm)
30
100~150
150~200
(MHz)
3.5~ 33
33~100
50
70
90
Temperature (˚C)
Formula of thickness
110
of crystal blank
f : Series resonance frequency. (MHz)
11.69/f
1.67/f
5.01/f
8.35/f
Equivalent electric circuit of a quarts crystal unit
L
1
C
C
1
0
R
1
Handling Notes