CRYSTAL UNITS

CRYSTAL
UNITS
For Microprocessor
CRYSTAL UNITS / NR-18
These crystal units are intended for use as reference clocks in microprocessors or the like.
■ Features
8 With a variety of standard frequencies available, these crystal units can be used for
various applications.
8 Taping type and gull-wing type are available for automatic mounting.
■ Specification
Item
Frequency Range
Overtone
Type
NR-18
3 ~ 30 MHz
Fundamental
22 ~ 75.875 MHz
3rd overtone
Frequency Tolerance (25±3˚C)
Temperature Characteristics
(in reference to +25˚C)
± 50 × 10-6
Operating Temperature Range
–10 ~ +60˚C
± 50 × 10-6
4 See Table
Equivalent Series Resistance
Drive Level
50 µW (1000 µW max)
500 µW (1000 µW max)
16pF
Standard Load Capacitance
Operable Temperature Range
Series
–40 ~ +85˚C
Typical Frequency (MHz)
3.579545
Fundamental
3.6864
4.0
4.332
4.433619
4.9152
6.0
7.15909
8.0
8.192
10.0
11.0592
12.0
13.104
14.31818
16.0
17.734475
18.432
20.0
24.576
27.0
28.63636
33.8688
36.864
43.55
51.925
59.28333
61.3
■ Dimensions
(mm)
4 Table Nominal Frequency and Equivalent
Series Resistance (Ω)
Overtone
3.70 max
3.5 ~ 20±1
13.46max
10.10 max
4.88±0.20
Fundamental
+0.05
–0.03
ø 0.43
11.05 max
4.65 max
3rd overtone
62
Frequency
Range (MHz)
Equivalent Series
Resistance (Ω)
3.0 ~ 3.2
200 max
3.2 ~ 3.5
150 max
3.5 ~ 4.6
100 max
4.6 ~ 4.9
80 max
4.9 ~ 5.1
70 max
5.1 ~ 5.7
50 max
5.7 ~ 6.0
45 max
6.0 ~ 8.0
40 max
8.0 ~ 9.0
35 max
9.0 ~ 10.0
30 max
10.0 ~ 30.0
25 max
22.0 ~ 76.0
40 max