IQD Frequency Products Ltd, Station Road, Crewkerne, Somerset, TA18 8AR, United Kingdom
Tel: +44 (0) 1460 270200; Fax: +44 (0) 1460 72578; Email: info@iqdfrequencyproducts.com Web: www.iqdstatek.com
An IQD Group Company
Issue 1: 26th April 2011 (Statek Ref 10198 RevA)
CX16 TF CRYSTAL
32.768kHz
Low Prole, Ultra-Miniature
Surface Mount Quartz Crystal
ceramic lid
DESCRIPTION
When miniaturization is paramount, IQD Statek’s low
prole CX16 TF quartz crystal is an excellent choice.
Available in a frequency of 32.768kHz, this crystal has
a typical footprint of 2.0 mm x 1.2 mm, and a typical
height of 0.4 mm. The resonator is manufactured using
Statek’s photolithographic and chemical milling pro-
cesses and then sealed within a ceramic package for
high stability and low ageing. Available with tight cali-
bration tolerances and high stability over temperature,
this crystal is well suited for applications that have a
space restraint and require a crystal with a low prole.
FEATURES
Ultra-miniature, surface mount design
Ultra-low prole
Hermetically sealed ceramic package
High shock and vibration survival
Excellent ageing characteristics
Full military testing available
APPLICATIONS
Medical
Main Clock/Real-Time Clock in:
TYPICAL
DIM inches mm
A 0.079 2.00
B 0.047 1.20
C 0.017 0.42
D 0.025 0.64
PACKAGE DIMENSIONS
Pacemakers
Debrillators
Neurostimulators
Infusion Pumps
Cochlear Implants
Glucose Monitoring Systems
Catheter Tips
Surgical Instruments
Spinal Nerve Stimulation and Treatment Implants
IQD Frequency Products Ltd, Station Road, Crewkerne, Somerset, TA18 8AR, United Kingdom
Tel: +44 (0) 1460 270200; Fax: +44 (0) 1460 72578; Email: info@iqdfrequencyproducts.com Web: www.iqdstatek.com
An IQD Group Company
Issue 1: 26th April 2011 (Statek Ref 10198 RevA)
SPECIFICATIONS
Specications are typical at 25OC unless otherwise noted.
Specications are subject to change without notice.
Fundamental Frequency 32.768 kHz
Motional Resistance R1 80 k
Motional Capacitance C1 5.0 fF
Quality Factor Q 12,000
Shunt Capacitance C0 1.2 pF
Load Capacitance1 9 pF
Mass (SM1, ceramic lid) 5 mg
Temperature Characterization2
Turnover Temperature3 T0 25OC
Frequency - Temperature
Constant k -0.035 ppm/OC2
Standard Calibration Tolerance4 ±100 ppm
Drive Level 0.5 µW MAX
Ageing, rst year 3 ppm MAX
Shock, survival 5,000 G, 0.3 ms, 1/2 sine
Vibration, survival 20 G, 10-2,000 Hz swept sine
Operating Temp. Range -10OC to +70OC (Commercial)
-40OC to +85OC (Industrial)
-55OC to +125OC (Military)
Storage Temp. Range -55OC to +125OC
Max Process Temperature 260OC for 20 sec.
1. Other load capacitances available.
2. The crystal frequency f as a function of temperature T follows the parabolic rela-
tionship
f (T) = f (T0) [1 + k (T - T0)2],
where T0 is the turnover temperature and k is the frequency-temperature constant.
3. Other turnover temperatures available.
4. Tighter tolerances available.
PACKAGING OPTIONS
• Tray Pack
• Tape and reel in accordance with EIA-481-D,
1kpcs per reel (please see Application Notes)
ORDERING INFORMATION
(*minimum required)
▪Frequency*
▪Model*
▪Termination Variant*
▪Frequency Tolerance (@25°C)*
▪Operating Temperature Range*
▪Load Capacitance*
▪Overtone
Example
▪32.768kHz CX16 TF SM1
100/-/–55 to 125C/9 FUND
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
C0
C1R12
1L1
R Motional Resistance L Motional Inductance
C Motional Capacitance C Shunt Capacitance
1 1
1 0
EQUIVALENT CIRCUIT
AMPLIFIER
BUFFER
CGCD
RA
CX11
OSC
Freq (f
)
O
R
f