ECS-3X8X, 2X6X, 1X5X
32.768 KHz TUNING FORK
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
PART NUMBERING GUIDE
“EXAMPLE”
MANUFACTURER
ECS
ECS
ECS
–
–
–
FREQUENCY
.327
.327
.327
–
–
–
LOAD CAPACITANCE
12.5
12.5
8
–
–
–
PACKAGE TYPE*
8X
13X
14X
* Package type examples (8X=3x8, 13X=2x6, 14X=1x5)
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
PARAMETERS
NOMINAL FREQUENCY
FREQUENCY TOLERANCE
LOAD CAPACITANCE (typ.)
DRIVE LEVEL (max.)
RESISTANCE
AT SERIES RESONANCE
Q-FACTOR
TURNOVER TEMPERATURE
TEMPERATURE COEFFICIENT
SHUNT CAPACITANCE
CAPACITANCE RATIO
OPERATING TEMP. RANGE
STORAGE TEMP. RANGE
SHOCK RESISTANCE
INSULATION RESISTANCE
AGING (FIRST YEAR)
MOTIONAL CAPACITANCE
Fo
Δ
f/fo
C
L
D
L
R
1
Q
T
M
ß
C
o
T
OPR
T
STG
IR
Δ
f/fo
C
1
ECS-3X8X
32.768
±20
12.5
1
35 (max.)
90,000 (typ.)
+25 ±5
2
-0.040ppm/˚C max.
1.60 (typ.)
460 (typ.)
ECS-2X6X
ECS-1X5X
32.768
32.768
±20
±20
12.5
8.0
1
1
35 (max.)
40 (max.)
70,000 (typ.)
80,000 (typ.)
+25 ±5
+25 ±5
2
2
-0.040ppm/˚C max.
-0.040ppm/˚C max.
1.35 (typ.)
1.00 (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/(
Δ
C˚)
pF
˚C
˚C
PPM
MΩ
PPM
pF
Note: Contact factory for optional load capacitance.
PACKAGE DIMENSIONS (mm)
1.1
Ø
3.1 Max.
RECOMMENDED OSCILLATION
CIRCUIT
Rf
PARABOLIC TEMPERATURE CURVE
T (˚C)
-20 -10
0
10
20 30 40 50
-10
-20
60
70
ø 0.35
8.2 Max.
10
Rd
-30
-40
-50
Figure 1) ECS-3X8X
0.7
C
1
C
2
-60
ø 2.1 Max
ø 0.26
f/f (PPM)
6.2 Max.
10
Figure 2) ECS-2X6X
0.45
ø 1.5 Max
ELECTRICAL CHARACTERISTICS
IC: TC 4069P
Rf: 10MΩ
Rd: 330KΩ (As required)
C
1
= 22pF, C
2
= 22pF
V
DD
= 3.0V
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.
To determine frequency stability, use parabolic
curvature. For example: What is the stability at 45˚C?
1) Change in T (˚C)
2) Change in frequency
= 45 -25 = 20˚C
= -0.04 PPM x (
Δ
T)
2
= -0.04 PPM x (20)
2
= -16.0 PPM
5.1 Max.
4.3
Figure 3) ECS-1X5X
ECS, INC. INTERNATIONAL
1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM
CRYSTALS
3
CRYSTALS
ø 0.2
ECS [ ECS, INC. ]
