ECS ECX-26

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
CONDITIONS
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
ECX-26
TYP
32.768
MIN
FO
∆f/fo
Optional CL available
DL
R1
Q
MAX
MIN
ECX-15
TYP
32.768
±20
12.5
1.0
50K
70K
+25
-0.35
0.9
360
β
CO
T OPR
T STG
@ 100V DC ±15V
@ +25˚C ±3˚C
C1
KHz
PPM
pF
µW
Ω
Q
˚C
PPM/˚C 2
pF
±20
12.5
+20
UNITS
MAX
-20
-40
500M
1.0
55K
+30
-0.04
+20
+70
+125
-20
-40
500M
70K
+25
-0.35
0.95
380
+30
-0.04
+70
+125
±3
0.0025
˚C
˚C
Ω
PPM
PF
±3
+0.0025
PARABOLIC TEMPERATURE CURVE
PACKAGE DIMENSIONS (mm)
T (˚C)
-20 -10
0
10
20 30 40 50
60
70
-10
7.95 ±0.05
2.05 ±0.05
#2
#3
#1
-20
-30
#2
-40
#3
-50
<Top View>
-60
#1
f/f (PPM)
1.55 ±0.05
<Top View>
#1
0.75
0.75
0.85
#3
Figure 1) ECX-26 Top, Side Bottom & End views
#1
0.75
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
0.75 0.6 0.75
#2
#3
0.9
#2
0.85
2.05 ±0.05
2.25 ±0.05
8.95 ±0.05
RECOMMENDED OSCILLATION
CIRCUIT
Figure 3) ECX-15 Top, Side Bottom & End views
Rf
0.85
7.4
0.85
Figure 2) ECX-26 Land Pattern
0.85 0.5 0.85
0.6
0.6
2.2
0.95
0.7
0.8
2.7
0.7
0.95
Rd
0.85
6.4
C1
0.85
C2
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.
ELECTRICAL CHARACTERISTICS
IC: TC 4069P, Rf: 10MΩ
Rd: 330KΩ (As required)
C 1 = 22pF, C 2 = 22pF, V DD = 3.0V
Figure 4) ECX-15 Land Pattern
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