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CX3SM Folha de dados(PDF) 2 Page - STATEK CORPORATION

Nome de Peças CX3SM
Descrição Electrónicos  Low Profile Miniature Surface Mount Quartz Crystal
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Fabricante Electrônico  STATEK [STATEK CORPORATION]
Página de início  http://www.statek.com
Logo STATEK - STATEK CORPORATION

CX3SM Folha de dados(HTML) 2 Page - STATEK CORPORATION

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STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
10123 - Rev C
SPECIFICATIONS
Specifications are typical at 25OC unless otherwise noted.
Specifications are subject to change without notice.
Frequency Range
800 kHz - 1.35 MHz
Functional Mode
Extensional
Calibration Tolerance1
500 ppm (0.05%)
1000 ppm (0.1%)
10000 ppm (1.0%)
Load Capacitance
7 pF
Motional Resistance (R1)
5 kΩ MAX
Motional Capacitance (C1) 1.2 fF
Quality Factor (Q)
150 k
Shunt Capacitance (C0)
1.0 pF
Drive Level
3 µW MAX.
Turning Point (T0)2
35OC
Temperature Coefficient (k) -0.035 ppm/OC2
Note: Frequency f at temperature T is related to frequency f0
at turning point temperature T0 by:
Aging, first year
5 ppm MAX
Shock, survival
1000 g, 0.3 ms,1/2 sine
Vibration, survival
10 g RMS, 20-1,000 Hz random
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. Tighter tolerances available.
2. Other values available.
+
_
+
_
+
_
f-f0 = k(T-T
0)
2
f0
HOW TO ORDER CX3SM CRYSTALS
CX3
S
C
SM1
1.0M
,
500
/
I
TERMINATIONS
Designation
Termination
SM1
Gold Plated
SM2
Solder Plated
SM3
Solder Dipped
SM4
Solder Plated (Lead Free)
SM5
Solder Dipped (Lead Free)
PACKAGING OPTIONS
CX3SM
- Tray Pack
- Tape and Reel
(Reference tape and reel data sheet 10109)
TYPICAL APPLICATION
FOR A PIERCE OSCILLATOR
The low profile CX miniature surface mount crystal is ideal
for small, high density, battery operated portable products.
The CX crystal designed in a Pierce oscillator (single
inverter) circuit provides very low current consumption and
high stability. A conventional CMOS Pierce oscillator circuit
is shown below. The crystal is effectively inductive and in a
PI-network circuit with CD and CG provides the additional
phase shift necessary to sustain oscillation. The oscillation
frequency (f0) is 15 to 150 ppm above the crystal’s series
resonant frequency (fS).
Drive Level
RA is used to limit the crystal’s drive level by forming a
voltage divider between RA and CD. RA also stabilizes the
oscillator against changes in the amplifiers output
resistance (R0). RA should be increased for higher voltage
operation.
Load Capacitance
The CX crystal calibration tolerance is influenced by the
effective circuit capacitances, specified as the load
capacitance (CL). CL is approximately equal to:
NOTE: CD and CG include stray layout to ground and CS
is the stray shunt capacitance between the crystal
terminal. In practice, the effective value of CL will be less
than that calculated from CD, CG and CS values because
of the effect of the amplifier output resistance. CS should
be minimized.
The oscillation frequency (f0) is approximately equal to:
AMPLIFIER
BUFFER
CG
CD
RA
CX3
XTAL
OSC
Freq (f )
O
Rf
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
f0 = fS
[1+ C1
]
2(C0 + CL)
(2)
Where f
S = Series resonant frequency of the crystal
C1 = Motional Capacitance
C0 = Shunt Capacitance
CL =
CD x CG
+
CS
CD + CG
(1)
“S” if special or
custom design.
Blank if Std.
Blank = Glass Lid
C = Ceramic Lid
SM1 = Gold Plated
SM2 = Solder Plated
SM3 = Solder Dipped
SM4 = Solder Plated (Lead Free)
SM5 = Solder Dipped (Lead Free)
Frequency
K = kHz
M = MHz
Calibration
Tolerance
@ 25OC
(in ppm)
Operating Temp. Range:
C = -10OC to +70OC
I = -40OC to +85OC
M = -55OC to +125OC
S = Customer Specified


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