ECS-3X8 Datasheet, PDF (1/1 Pages) List of Unclassifed Manufacturers – 32.768 KHz TUNING FORK CRYSTALS

ECS-3X8, 2X6, 1X5 32.768 KHz TUNING FORK CRYSTALS
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
PART NUMBERING GUIDE “EXAMPLE”
FREQUENCY
LOAD CAPACITANCE
ECS
–
.327
–
12.5
–
ECS
–
.327
–
12.5
–
ECS
–
.327
–
8
–
* Package type examples (8=3x8, 13=2x6, 14=1x5)
PACKAGE TYPE*
8
13
14
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PARAMETERS
NOMINAL FREQUENCY
Fo
FREQUENCY TOLERANCE
∆f/fo
LOAD CAPACITANCE (typ.)
CL
DRIVE LEVEL (max.)
DL
RESISTANCE AT SERIES RESONANCE R1
Q-FACTOR
Q
TURNOVER TEMPERATURE
TM
TEMPERATURE COEFFICIENT
ß
SHUNT CAPACITANCE
Co
CAPACITANCE RATIO
OPERATING TEMP. RANGE
TOPR
STORAGE TEMP. RANGE
TSTG
SHOCK RESISTANCE
INSULATION RESISTANCE
IR
AGING (FIRST YEAR)
∆f/fo
MOTIONAL CAPACITANCE
C1
Note: Contact factory for optional load capacitance.
ECS-3X8
ECS-2X6
ECS-1X5
32.768
32.768
32.768
±20
±20
±20
12.5
12.5
8.0
1
1
1
35 (max.)
35 (max.)
40 (max.)
90,000 (typ.)
70,000 (typ.)
80,000 (typ.)
+25 ±5
+25 ±5
+25 ±5
-0.040ppm/˚C² max.
-0.040ppm/˚C² max.
-0.040ppm/˚C² max.
1.60 (typ.)
1.35 (typ.)
1.00 (typ.)
460 (typ.)
450 (typ.)
400 (typ.)
-10~+60
-40~+85
Drop test 3 times on hard wooden board from height of 75cm / ±5 PPM max.
500MΩ min./DC100V
±3 PPM max. @ +25˚C ±3˚C
0.0035 (typ.)
0.0030 (typ.)
0.0025 (typ.)
UNITS
KHz
PPM
pF
µW
KΩ
˚C
PPM/(∆C˚)
pF
˚C
˚C
PPM
MΩ
PPM
pF
PACKAGE DIMENSIONS (mm)
8.2 Max.
10
Figure 1) ECS-3X8
6.2 Max.
10
Figure 2) ECS-2X6
5.1 Max.
4.3
Figure 3) ECS-1X5
RECOMMENDED OSCILLATION
CIRCUIT
Rf
Rd
C1
C2
ELECTRICAL CHARACTERISTICS
IC: TC 4069P
Rf: 10MΩ
Rd: 330KΩ (As required)
C₁ = 22pF, C₂ = 22pF
V_DD = 3.0V
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.
PARABOLIC TEMPERATURE CURVE
T (˚C) -20 -10 0 10 20 30 40 50 60 70
-10
-20
-30
-40
-50
-60
f/f (PPM)
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)²
= -0.04 PPM x (20)²
= -16.0 PPM
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX [phone] • WWW.ECSXTAL.COM
CRYSTALS 3 CRYSTALS