Specification of Crystal Unit
1 NDK PART NUMBER NX2520SA
5T
yp
e NX2520SA
(STD-CSW-2)
6Electrical characteristics
6.1 Nominal frequency(F0) * ATTACHED SHEETS 5
6.2 Overtone order Fundamental
6.3 Adjustment tolerance
±
10
×
10-6 max.
(
+25 °C
)
6.4 Tolerance over the temperature range
±
10
×
10-6 max.
(
-10~+60 °C
)
The reference temperature shall be +25
6.5 Equivalent resistance (R1) *ATTACHED SHEETS 5
6.6 Maximum Drive Level 100μW max.
7Measurement circuit
7.2 Frequency measurement
7.1.1 Measuring instrument π circuit
7.1.2 Load capacitance(CL) 10pF
7.1.3 Level of drive 10μW
7.2 Equivalent resistance measurement
7.2.1 Measuring instrument π circuit
7.2.2 Load capacitance(CL) Series
7.2.3 Level of drive 10μW
8Dimension
13 Feb. 2009 Rev.B
2.5 0.1
2.0 0.1
0.65 Max
Cover
Metal
Base
Alumina Ceramics
(0.8)
(0.65)
(0.8)
(0.65)
#3
#4
#1 #2
PIN CONNECTION
[TOP VIEW]
TERMINAL
#1,#3:X'tal
#2,#4:GND(CONNE CTION COVER)
LAND PATTERN (TYPICAL)
1.2
1.0
1.3
1.7
Terminal
Tun g ste n Me t a liz e
(Au plating on Ni pre plating)
#1
#3
#2
#4
C 0.3
Frequency(MHz) IC(ESR)
16 80 ohm
20 70 ohm
24 70 ohm
24.576 70 ohm
26 70 ohm
30 50 ohm
32 50 ohm
40 50 ohm
44 50 ohm
48 50 ohm
