QTC2 Series
1.2x2.0 SMD Tuning Fork
Features
• Low frequency in smallest size SMD
• Seam sealed ceramic package offers excel-
lent environmental & heat resistance
• Extended temperature -40 to +85°C for
industrial applications
Applications
• Commercial and Industrial applications
• Wireless communications
• PDA and Smartphone
• Time of day applications
General Specifications
Nominal Frequency
Frequency Tolerance at 25°C
Temperature Coefficient
Temperature Range (Operating)
Storage Temperature
Load Capacitance C
L
Shunt Capacitance C
0
Motional Capacitance C
1
Equivalent Series Resistance (ESR)
Drive Level
Aging per Year
Insulation Resistance (M
Ω)
Quality Factor
Capacitance Ratio
32.768kHz
±20ppm
-0.034 ± 0.008ppm/D ºC²
-40 to +85ºC
-55 to +125°C
7pF, 9pF, 12.5pF
1.2pF typ.
4.0fF typ.
70KΩ max.
0.5μW max.
±3ppm max.
500 at 100Vdc ±15Vdc
70000 typ.
450 typ.
Mechanical Dimensions
2,0
0,55
0,55
0,8
0,7
0,8
1,2
Part Numbering Guide
Qantek Code
Q = Qantek
Package
TC2 = 1.2x2.0 SMD
=
Tuning Fork
Nominal Frequency (in kHz)
32.768
Load Capacitance
07 = 7pF
09 = 9pF
12 = 12.5pF
Operating Temperature Range
B = -40 to +85°C
max.0,60
Frequency Tolerance
1 = ±10ppm
2 = ±20ppm
Packaging
R = 3000pcs Tape&Reel
Example: QTC232.76812B2R
bold letters = recommended standard specification
Tape and Reel Dimensions
QANTEK Technology Corporation
Phone: +1 877-227-0440 (tollfree)
Fax:
+1 877-227-0440 (tollfree)
www.qantek.com
info@qantek.com
QTC2 Rev. 0.3
1,5
QTC2 Series
1.2x2.0 SMD Tuning Fork
Marking Code Guide
Contains manufacturer code / lot code
Solder Reflow Profile
Frequency vs. Temperature Characteristics
To calculate the frequency stability the parabolic curvature constant (K) is needed.
For calculating the stability at 45°C?
1- Change in temperature (
DT)
is (45-25) = +20°C
2- Change in frequency is (-0.034 x (
D°C)²)
= (-0.035 x (20)² = -13.6ppm
QANTEK Technology Corporation
Phone: +1 877-227-0440 (tollfree)
Fax:
+1 877-227-0440 (tollfree)
www.qantek.com
info@qantek.com
QTC2 Rev. 0.3
