Datasheet > R38

R38

更新时间： 2024-11-05 06:06:23

品牌	Logo	应用领域
纬创 - RALTRON		晶体
页数	文件大小	规格书
1页	33K
描述
TUNING FORK CRYSTAL UNITS

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数据手册

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R38 数据手册

TUNING FORK CRYSTAL UNITS

FEATURES

SERIES R38, R26, AND R145

3 x 8, 2 x 6, 1 x 5 mm

DESIGNED FOR TIME OF DAY CLOCKSAPPLICATIONS

SMALLCOMPACT SIZE WITH PERFORMANCEAND ECONOMY

EXCELLENT SHOCKAND ENVIRONMENTAL CHARACTERISTICS

SPECIFICATIONS

HOLDER TYPE

R38

32.768 kHz

±5 ±10 ±20 PPM

25°C ±5°C

R26

32.768 kHz

±5 ±10 ±20 PPM

25°C ±5°C

R145

32.768 kHz

±5 ±10 ±20 PPM

25°C ±5°C

R38, R26

30.00 kHz TO 153.6 kHz †

±5 ±10 ±20 PPM

25°C ±5°C

NOMINAL FREQUENCY

FREQUENCY TOLERANCE

TURNOVER TEMPERATURE

PARABOLIC CURVATURE

CONSTANT (TYP) ††

-0.034 PPM/C²

6 or 12.5 pF

35k OHM

-0.034 PPM/C²

6 or 12.5 pF

35k OHM

-0.034 PPM/C²

8.0 pF

-0.034 PPM/C²

6 or 12.5 pF

LOAD CAPACITANCE †††

EQUIVALENT SERIES

RESISTANCE (MAX)

40k OHM

30k TO 50k OHM

DRIVE LEVEL (TYP)

1.0 µW

0.0035 pF

1.6 pF

460

±3 PPM

90000

1.0 µW

0.003 pF

1.35 pF

450

±3 PPM

70000

1.0 µW

0.0025 pF

1.0 pF

400

±3 PPM

80000

1.0 µW

.001 TO .004 pF

0.8 TO 1.7 pF

425 TO 800

±5 PPM

MOTIONAL CAPACITANCE (TYP)

SHUNT CAPACITANCE (TYP)

CAPACITANCE RATIO (TYP)

AGING (FIRST YEAR MAX)

QUALITY FACTOR (TYP)

INSULATION RESISTANCE (MIN)

OPERATING TEMPERATURE

RANGE

FREQUENCY-PACKAGE SPECIFIC

500 M OHM

-20°C TO +60°C STANDARD

-40°C TO +85°C EXTENDED

STORAGE TEMPERATURE

RANGE

-40°C TO +85°C

±5 PPM MAXIMUM 75 cm DROP TEST IN 3 AXES ONTO A HARD SURFACE

OR 3000 g x 0.3 ms x ½ SINEWAVE IN 3 AXES

SHOCK RESISTANCE

STANDARD PART NUMBER

R38-32.768-12.5

R26-32.768-12.5

R145-32.768-12.5

SEE PART NUMBERING SYSTEM

† COMMON FREQUENCIES ARE: 31.250 kHz, 31.500 kHz, 40.00 kHz, AND 76.800 kHz

†† FREQUENCY DEVIATIONAT T IS GIVENAS: ∆ f/f = K(To - T)², WHERE K IS PARABOLIC CURVATURE CONSTANT

††† OTHER LOAD CAPACITANCESAREAVAILABLE

OUTLINE DRAWINGS

1.50 MAX

.059 MAX

R26

R38

R145

2.10 MAX

.083 MAX

3.10 MAX

.122 MAX

0.26 DIA

.010 DIA

0.35 DIA

.014 DIA

SCALE NONE DIMENSION IN mm/INCH

0.2 DIA

.008 DIA

0.70

.028

1.10

.043

0.45

.018

PART NUMBERING SYSTEM

LOAD

EXTENDED

TEMPERATURE

SERIES

FREQUENCY

TOLERANCE

CAPACITANCE

IN pF

R38

R26

R145

±5 PPM

±10 PPM

EXT

IN kHz

( ±20 PPM ONLY)

EXAMPLES:

R38-32.768-6-10PPM

R26-32.768-12.5-EXT

Raltron Electronics Corporation 10651 NW 19th St. Miami, Florida 33172 U.S.A.

Tel: 305-593-6033 Fax: 305-594-3973 e-mail: sales@raltron.com Internet: http://www.raltron.com

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