3

ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM

CRYSTALS

CRYSTALS

8.2 Max.

10

ECS tuning fork type crystals are used as a

clock source in communication equipment,

measuring instruments, microprocessors and

other time management applications. Their

low power consumption makes these crystals

ideal for portable equipment.

FEATURES

• Cost effective

• Tight tolerance

• Long term stability

• Excellent resistance and

environmental characteristics

• PbFree/RoHS Compliant

ECS-3X8X, 2X6X, 1X5X

32.768 KHz TUNING FORK

PACKAGE DIMENSIONS (mm)

OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS

PARAMETERS

ECS-3X8X

ECS-2X6X

ECS-1X5X

UNITS

NOMINAL FREQUENCY

Fo

32.768

32.768

32.768

KHz

FREQUENCY TOLERANCE

Δ

f/fo

±20

±20

±20

PPM

LOAD CAPACITANCE (typ.)

12.5

12.5

8.0

pF

DRIVE LEVEL (max.)

1

1

1

µW

35 (max.)

35 (max.)

40 (max.)

KΩ

Q-FACTOR

Q

90,000 (typ.)

70,000 (typ.)

80,000 (typ.)

TURNOVER TEMPERATURE

+25 ±5

+25 ±5

+25 ±5

˚C

TEMPERATURE COEFFICIENT

ß

-0.040ppm/˚C

-0.040ppm/˚C

-0.040ppm/˚C

SHUNT CAPACITANCE

1.60 (typ.)

1.35 (typ.)

1.00 (typ.)

pF

CAPACITANCE RATIO

460 (typ.)

450 (typ.)

400 (typ.)

OPERATING TEMP. RANGE

-10~+60

˚C

STORAGE TEMP. RANGE

-40~+85

˚C

SHOCK RESISTANCE

Drop test 3 times on hard wooden board from height of 75cm / ±5 PPM max.

PPM

INSULATION RESISTANCE

IR

500MΩ min./DC100V

MΩ

AGING (FIRST YEAR)

Δ

f/fo

±3 PPM max. @ +25˚C ±3˚C

PPM

MOTIONAL CAPACITANCE

0.0035 (typ.)

0.0030 (typ.)

0.0025 (typ.)

pF

MANUFACTURER

FREQUENCY

LOAD CAPACITANCE

PACKAGE TYPE*

ECS

–

.327

–

12.5

–

8X

ECS

–

.327

–

12.5

–

13X

ECS

–

.327

–

8

–

14X

Figure 1) ECS-3X8X

6.2 Max.

10

Figure 2) ECS-2X6X

5.1 Max.

4.3

Figure 3) ECS-1X5X

* Package type examples (8X=3x8, 13X=2x6, 14X=1x5)

Note: Contact factory for optional load capacitance.

RECOMMENDED OSCILLATION

CIRCUIT

ELECTRICAL CHARACTERISTICS

IC: TC 4069P

Rf: 10MΩ

Rd: 330KΩ (As required)

Rf

Rd

In this circuit, low drive level with a maximum of 1µW is rec-

ommended. If excessive drive is applied, irregular oscillation

or quartz element fractures may occur.

PARABOLIC TEMPERATURE CURVE

-20

-10

-20

-30

-40

-50

-60

-10

0

10

203040 50

60

70

f/f (PPM)

T (˚C)

To determine frequency stability, use parabolic

curvature. For example: What is the stability at 45˚C?

1) Change in T (˚C)

= 45 -25 = 20˚C

2) Change in frequency

= -16.0 PPM