ECX-26 参数 Datasheet PDF下载

ECX-26/ECX-15

32.768 KHz SMD TUNING FORK CRYSTAL

The miniature ECX-26 and the sub-miniature

ECX-15 are compact, cost effective SMD

tuning fork crystals. The slimline molded

package requires less space than other SMD

tuning fork crystals.

FEATURES

• Cost effective

• Low profile

• Long term stability

• Tape & Reel packaging

PART NUMBERING GUIDE

“EXAMPLE”

MANUFACTURER

ECS

–

FREQUENCY (32.768 MHz)

.327

–

LOAD CAPACITANCE*

12.5

–

PACKAGE TYPE

26

* Package type examples (26=ECX-26, 27=ECX-15) Sample Part Number: ECS-.327-12.5-26

OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS

PARAMETERS

FREQUENCY RANGE

FREQUENCY TOLERANCE

LOAD CAPACITANCE

DRIVE LEVEL

EQUIV. SERIES RESISTANCE

Q-FACTOR

TURNOVER TEMPERATURE

TEMPERATURE COEFFICIENT

SHUNT CAPACITANCE

CAPACITANCE RATIO

OPERATING TEMP RANGE

STORAGE TEMP RANGE

INSULATION RESISTANCE

AGING (FIRST YEAR)

MOTION CAPACITANCE

CONDITIONS

F

O

∆f/fo

Optional CL available

D

L

R

1

Q

+20

β

C

O

T

OPR

T

STG

@ 100V DC ±15V

@ +25˚C ±3˚C

C

1

-20

-40

500M

0.0025

MIN

ECX-26

TYP

32.768

12.5

1.0

50K

70K

+25

-0.35

0.9

360

+30

-0.04

+20

70K

+25

-0.35

0.95

380

MAX

±20

12.5

1.0

55K

+30

-0.04

MIN

ECX-15

TYP

32.768

MAX

±20

UNITS

KHz

PPM

pF

µW

Ω

Q

˚C

PPM/˚C

2

pF

˚C

˚C

Ω

PPM

PF

+70

+125

±3

-20

-40

500M

+0.0025

+70

+125

±3

PACKAGE DIMENSIONS (mm)

8.95

±0.05

2.25

±0.05

#2

#3

<Top View>

PARABOLIC TEMPERATURE CURVE

T (˚C)

-20 -10

0

10

20 30 40 50

-10

60

70

7.95

±0.05

2.05

±0.05

#2

#3

<Top View>

-20

-30

-40

-50

#1

#1

-60

2.05

±0.05

1.55

±0.05

f/f (PPM)

#2

#3

#1

0.85

#2

#3

#1

0.85

0.75

0.75

0.75 0.6 0.75

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

2) Change in frequency = -0.04 PPM x (∆T)

2

= -0.04 PPM x (20)

= -16.0 PPM

0.9

0.75

0.75

RECOMMENDED OSCILLATION

CIRCUIT

Rf

Figure 1) ECX-26 Top, Side Bottom & End views

Figure 3) ECX-15 Top, Side Bottom & End views

Rd

0.85 0.5 0.85

C

1

C

2

0.95

In this circuit, low

drive level with a

maximum of 1µW

is recommended.

If excessive drive

is applied, irregu-

lar oscillation or

quartz element

fractures may

occur.

0.95

0.7

2.7

0.8

2.2

0.7

0.85

7.4

0.85

0.85

0.6

6.4

0.6

0.85

Figure 2) ECX-26 Land Pattern

Figure 4) ECX-15 Land Pattern

ELECTRICAL CHARACTERISTICS

IC: TC 4069P, Rf: 10MΩ

Rd: 330KΩ (As required)

C

1

= 22pF, C

2

= 22pF, V

DD

= 3.0V

ECS, INC. INTERNATIONAL

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

SMD CRYSTALS

15

SMD CRYSTALS