ECS ECS-3X8, ECS-2X6, ECS-1X5 User Manual

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ECS-3X8,2X6,1X532.768 KHz TUNING FORK CRYSTALS

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.com

U

DataSheet

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.

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FEATURES

Cost effective
Tight tolerance
Long term stability
Excellent resistance and environmental characteristics

PART NUMBERING GUIDE

“EXAMPLE”

FREQUENCY LOAD CAPACITANCE PACKAGE TYPE*

ECS – .327 – 12.5 – 8
ECS – .327 – 12.5 – 13
ECS – .327 – 8 – 14

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

OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS

PARAMETERS ECS-3X8 ECS-2X6 ECS-1X5 UNITS

NOMINAL FREQUENCY Fo 32.768 32.768 32.768 KHz
FREQUENCY TOLERANCE ∆f/fo ±20 ±20 ±20 PPM
LOAD CAPACITANCE (typ.) C
DRIVE LEVEL (max.) D
RESISTANCE

AT SERIES RESONANCE

L
L

R

1

Q-FACTOR Q 90,000 (typ.) 70,000 (typ.) 80,000 (typ.)
TURNOVER TEMPERATURE T
TEMPERATURE COEFFICIENT
SHUNT CAPACITANCE C

M

ß

o

CAPACITANCE RATIO 460 (typ.) 450 (typ.) 400 (typ.)
OPERATING TEMP. RANGE T
STORAGE TEMP. RANGE T

OPR

STG

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) ∆f/fo ±3 PPM max. @ +25˚C ±3˚C PPM
MOTIONAL CAPACITANCE C

Note: Contact factory for optional load capacitance.

1

12.5 12.5 8.0 pF
111µW

35 (max.) 35 (max.) 40 (max.) KΩ

+25 ±5 +25 ±5 +25 ±5 ˚C

-0.040ppm/˚C2 max. -0.040ppm/˚C2 max. -0.040ppm/˚C2 max. PPM/(∆C˚)

1.60 (typ.) 1.35 (typ.) 1.00 (typ.) pF

-10~+60 ˚C

-40~+85 ˚C

0.0035 (typ.) 0.0030 (typ.) 0.0025 (typ.) pF

PACKAGE DIMENSIONS (mm)

Ø 3.1 Max.

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

8.2 Max. 10

ø 2.1 Max

6.2 Max. 10

ø 1.5 Max

5.1 Max. 4.3

Figure 3) ECS-1X5

1.1

Figure 1) ECS-3X8

0.7

Figure 2) ECS-2X6

0.45

ø 0.2

RECOMMENDED OSCILLATION

ø 0.35

ø 0.26

ELECTRICAL CHARACTERISTICS

In this circuit, low drive level with a maximum of
1µW is recommended. If excessive drive is
applied, irregular oscillation or quartz element
fractures may occur.

CRYSTALS CRYSTALS

3

CIRCUIT

Rf

C

1

IC: TC 4069P

Rf: 10MΩ

Rd: 330KΩ (As required)

= 22pF, C

C

1

V

DD

2

= 3.0V

= 22pF

PARABOLIC TEMPERATURE CURVE

T (˚C)

-20

-10 0 10 20 30 40 50 60 70

-10

Rd

C

2

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 = -0.04 PPM x (∆T)

-20

-30

-40

-50

-60

f/f (PPM)

= -0.04 PPM x (20)
= -16.0 PPM

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