ECS ECX-26X

ECX-26X/ECX-15X
32.768 KHz SMD TUNING FORK CRYSTAL
The miniature ECX-26X and the sub-miniature
ECX-15X 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
• RoHS Compliant w/exemption for Pb in high temp solder
• Tape & Reel packaging
PART NUMBERING GUIDE “EXAMPLE”
MANUFACTURER
ECS
FREQUENCY (32.768 MHz)
.327
–
LOAD CAPACITANCE*
12.5
–
PACKAGE TYPE
26X
–
* Package type examples (26X=ECX-26X, 27X=ECX-15X) Sample Part Number: ECS-.327-12.5-26X
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-26X
TYP
32.768
MIN
FO
∆f/fo
Optional CL available
DL
R1
Q
70K
+25
-0.35
0.9
360
-20
-40
500M
2.05 ±0.05
2.25 ±0.05
+20
+70
+125
-20
-40
500M
±3
+0.0025
#2
<Top View>
#1
0.75
0.75
Figure 2) ECX-26X Land Pattern
0.75 0.6 0.75
#2
10
20 30 40 50
60
70
-30
-50
C1
0.85 0.5 0.85
0.6
0.85
6.4
C2
-60
f/f (PPM)
Figure 3) ECX-15X Top, Side Bottom & End views
0.6
0.8
0.85
0
-40
0.95
0.7
7.4
-20 -10
-20
2.2
0.7
2.7
0.85
˚C
˚C
Ω
PPM
PF
-10
#1
Rd
0.95
Figure 1) ECX-26X Top, Side Bottom & End views
KHz
PPM
pF
µW
Ω
Q
˚C
PM/˚C
pF
PARABOLIC TEMPERATURE CURVE
T (˚C)
Rf
1.55 ±0.05
0.75
+70
+125
RECOMMENDED OSCILLATION
CIRCUIT
#3
0.9
#1
0.75
0.85
#3
+30
-0.04
UNITS
#3
0.85
2.05 ±0.05
#2
70K
+25
-0.35
0.95
380
+30
-0.04
±3
7.95 ±0.05
#1
1.0
55K
0.0025
PACKAGE DIMENSIONS (mm)
<Top View>
12.5
1.0
50K
T OPR
T STG
@ 100V DC ±15V
@ +25˚C ±3˚C
C1
#2
MAX
±20
12.5
β
CO
#3
ECX-15X
TYP
32.768
MIN
±20
+20
8.95 ±0.05
MAX
ELECTRICAL CHARACTERISTICS
IC: TC 4069P
Rf: 10MΩ
Rd: 330KΩ (As required)
C 1 = 22pF, C 2 = 22pF
V DD = 3.0V
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
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.
0.85
Figure 4) ECX-15X 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
14
SMD CRYSTALS