15351 West 109th Street | Lenexa, KS 66219 | Phone: 913.782.7787 | Fax: 913.782.6991 | www.ecsxtal.com
PARAMETERS
CONDITIONS
ECX-306X
UNITS
MIN
TYP
MAX
Frequency
Fo
32.768
KHz
Frequency Tolerance
@ +25°C
± 20 *
ppm
Load Capacitance
Specify in P/N
12.5
pF
Drive Level
DL
1.0
μW
Equivalent Series Resistance
R1
50K
Ω
Turnover Temperature
+20
+25
+30
°C
Temperature Coefficient
-0.028
-0.034
-0.040
ppm/°C2
Shunt Capacitance
Co
1.35
pF
Aging (First Year)
@ +25°C ±3°C
±3
ppm
Operating Temperature
Topr
-40
+85
°C
Storage Temperature
Tstg
-55
+125
°C
Insulation Resistance
@ 100V DC
500M
Ω
ECS - FREQUENCY ABBREVIATION
LOAD
CAPACITANCE
PACKAGE
CUSTOM OPTIONS
Tolerance
PACKAGING
OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS
PART NUMBERING GUIDE: Example ECS-.327-12.5-17X-TR
Figure 2) Suggested Land Pattern
Figure 1) Top, Side, and End views
.327 = 32.768 KHz
• Low Profile
• Long Term Stability
• Industry Standard Footprint
• Extended Temp. Range
• RoHS Compliant
• Low Power RTC Applications
such as STM32 AN2867
17X = ECX-306X
DIMENSIONS (mm)
12.5 = 12.5 pF
9 = 9 pF
7 = 7 pF
6 = 6 pF
TR = Tape
& Reel
3K/Reel
Blank (Std) = ±20 ppm
* C = ± 10 ppm
ECS
*Contact ECS for availability
The ECX-306X is a compact SMD Tuning Fork Crystal. The
3.8 x 8.0 x 2.5 mm package is ideal for communications and
measuring equipment.
ECX-306X
SMD CRYSTAL
ECX-306X SMD CRYSTAL
Rev.2020
Request a Sample
15351 West 109th Street | Lenexa, KS 66219 | Phone: 913.782.7787 | Fax: 913.782.6991 | www.ecsxtal.com
SOLDER PROFILE
Peak solder Temp +260°C Max 10 sec Max.
2 Cycles Max.
MSL 1, Lead Finish Sn/Ag
POCKET TAPE DIMENSIONS (mm)
ECX-306X
SMD CRYSTAL
Figure 1) Suggested Reflow Profile
