Document No. 008-0332-0

Page 2 - 3

Rev. A

Model 425

2.5x2.0mm Low Cost

Surface Mount Crystal

ELECTRICAL CHARACTERISTICS

PARAMETER

VALUE

Operating Mode

Fundamental

Crystal Cut

AT-Cut

Frequency Range

16.0 MHz to 54.0 MHz

± 30 ppm Standard

(± 10 ppm, ±15 ppm and ± 20 ppm Available)

Frequency Stability Tolerance

± 50 ppm Standard

(Operating Temperature Range, Referenced to 25°C Reading)

(± 10 ppm, ± 20 ppm, ± 30 ppm and ± 40 ppm Available)

-20°C to +70°C Standard

(-40°C to +85°C Available)

Storage Temperature Range

-40°C to +85°C

Equivalent Series Resistance

See ESR Table

Load Capacitance or Resonance Mode

See Ordering Information

5.0 pF Maximum

Drive Level

10 µW Typical, 100 µW Maximum

Aging @ 25°C

± 3 ppm/year maximum

Reflow Condition, per JEDEC J-STD-020

+255°C ± 5°C, 10 Seconds Maximum

Frequency Tolerance @ 25°C

Operating Temperature Range

EQUIVALENT SERIES RESISTANCE TABLE

FREQUENCY RANGE

MODE of OSCILLATION ESR Maximum

16.00 MHz - 19.999 MHz

Fundamental

120 Ohms

20.00 MHz - 29.999 MHz

Fundamental

100 Ohms

30.00 MHz - 54.000 MHz

Fundamental

60 Ohms

MECHANICAL SPECIFICATIONS

Notes:

1. Termination pads (e4), barrier-plating is nickel (Ni) with gold (Au) flash plate.

2. Terminations #2, #4 and the metal lid are connected internally.

End user may connect these pins to circuit ground.

MARKING INFORMATION

1. XX.XX – Frequency in MHz.

2. C – CTS and Pin 1 identifier.

3. ** – Manufacturing Site Code.

4. D – Manufactured Date Code. See Table I for

codes.

5. Complete CTS part number, frequency value and

date code information must appear on reel and

box labels.

SUGGESTED SOLDER PAD GEOMETRY

0.035 [0.90]

0.073 [1.85]

1

4

0.061 [1.55]

2

Inch

[mm]

Key:

3

0.039 [1.00]

PACKAGE DRAWING

0.064

( 1.625 )

0.029

( 0.725 )

0.027

( 0.675 )

0.028

( 0.700 )

#2

Bottom View

Top View

2

1

4

3

( 0.65 )

MAX

( 2.50 ±0.10 )

0.098 ±0.004

0.026

( 2.00 ±0.10 )

0.079 ±0.004

Key:

( MM )

Inch

#2

#3

#4

#1

XX.XX

C**D