Quartz Crystal 20.000 MHz SC HC-45/U 3rd overtone CL 18pF

Specification for Crystal Part # X20.000SC-45-M3-18AB

2. TEMPERATURE CHARACTERISTICS

Item

Parameter

Condition

Min.

Typ.

Max.

Unit

Note

2.1

Reference temperature, ref T

+88

+92

+96

˚C

2.2

Operating temperature range

˚C

2.3

Storage temperature range

-55

+105

˚C

3. ELECTRICAL PARAMETERS

3.1

Motional resistance

R₁

45

60

90

Ohm

3.2

Motional inductance

L₁

211

mH

3.2

Motional capacitance

C₁

0.25

0.30

0.35

fF

3.3

Static shunt capacitance

C₀

2.1

2.4

2.7

pF

3.4

Figure of merit

Q

300 000

 500 000

-

3.5

Shunt inductance

L₀

26

μH

Optional C₀ cancellation

4. FREQUENCY CHARACTERISTICS

4.1

Nominal frequency

@ ref T, C_L and nom P

20.000 000

MHz

4.2

Frequency accuracy

@ ref T, C_L and nom P

-2.5

+0.5

ppm

4.3

Drive level dependency, R₁(P)

R₁ max / R₁ min

10

%

DLD sweep from 0.1 uW — nom P

4.4

Drive level dependency, f₁(P)

Δf / f nom

ppm

DLD Sweep from 0.1uW — nom P

4.5

Long term stability (aging)

First year

-15

+15

ppb

After 30 days of continues operation

4.6

Long term stability (aging)

After first year

ppb

After 30 days of continues operation