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CX4 参数 Datasheet PDF下载

CX4图片预览
型号: CX4
PDF下载: 下载PDF文件 查看货源
内容描述: 超小型薄型表面贴装石英晶体 [Ultra-Miniature Low Profile Surface Mount Quartz Crystal]
分类和应用: 晶体石英晶体
文件页数/大小: 2 页 / 445 K
品牌: STATEK [ STATEK CORPORATION ]
 浏览型号CX4的Datasheet PDF文件第1页  
TYPICAL APPLICATION  
FOR A PIERCE OSCILLATOR  
SPECIFICATIONS  
Specifications are typical at 25OC unless otherwise noted.  
Specifications are subject to change without notice.  
The CX4 family of surface mount crystals are ideal for  
small, high density, battery operated portable products. The  
CX4 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 50 to 250 ppm above the crystal’s series  
resonant frequency (fS).  
Parameters  
Frequency, (Hz)  
Fundamental  
Overtone  
600 K 1.0 M 1.4 M 1.8432 M 2.4576 M  
Motional Resistance, R1 ()  
Motional Resistance, R1 MAX  
300  
400  
600  
3K  
500  
1000  
Motional Capacitance, C1 (fF) 3.5  
2.0  
200  
0.8  
1.3  
150  
0.7  
3.5  
80  
1.5  
45  
Quality Factor, Q (k)  
Shunt Capacitance, C0 (pF)  
Standard Calibration  
Tolerance*  
250  
1.0  
1.0  
0.8  
Drive Level  
+_ 500 ppm ( +_ 0.05%)  
+_ 1000 ppm ( +_ 0.1%)  
+_ 10000 ppm ( +_ 1.0%)  
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.  
Drive Level  
3 µW MAX  
Load Capacitance, CL**  
Turning Point, T0**  
Temperature Coefficient, k  
7pF  
Load Capacitance  
35OC  
The CX4 crystal calibration tolerance is influenced by the  
effective circuit capacitances, specified as the load  
capacitance (CL). CL is approximately equal to:  
-0.035 ppm/OC2 TYP  
Note: Frequency f at temperature T is related to frequency f0 at  
turning point temperature T0 by:  
2
f-f0  
f0  
CD x CG  
=
k(T-T )  
0
=
+
(1)  
CL  
CS  
CD + CG  
Functional Mode  
Aging, first year  
Extensional  
5ppm MAX  
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.  
Shock, survival  
Vibration, survival  
Operating Temp. Range  
1500 g peak, 0.3 ms, 1/2 sine  
20 g RMS, 10-2,000 Hz random  
-10OC to +70OC (Commercial)  
-40OC to +85OC (Industrial)  
-55OC to +125OC (Military)  
-55OC to +125OC  
The oscillation frequency (f0) is approximately equal to:  
C1  
Storage Temp. Range  
=
+
(2)  
f0 fS  
1
[
260OC for 20 sec.  
]
Max Process Temperature  
2(C0 + CL)  
*Tighter tolerances available  
**Other values available  
Where  
= Series resonant frequency of the crystal  
= Motional Capacitance  
= Shunt Capacitance  
fS  
C1  
C0  
NOTE: All values subject to change without notice.  
TERMINATIONS  
CONVENTIONAL CMOS  
PIERCE OSCILLATOR CIRCUIT  
Designation Termination  
SM1  
SM2  
SM3  
Gold Plated  
Solder Plated  
Solder Dipped  
Rf  
BUFFER  
PACKAGING OPTIONS  
CX4 - Tray Pack  
OSC  
Freq (fO )  
RA  
AMPLIFIER  
- Tape and Reel  
(Reference tape and reel data sheet 10109)  
HOW TO ORDER CX4 CRYSTALS  
CX4  
S
C
SM1  
1.8432M  
,
500  
/
M
CG  
CD  
CX4  
XTAL  
Frequency  
K = kHz  
M = MHz  
Calibration  
Tolerance  
@25OC  
Operating Temp. Range:  
C
I
= -10OC to +70OC  
= -40OC to +85OC  
C = Ceramic Lid  
Blank = Glass Lid  
(in ppm)  
M = -55OC to +125OC  
“S” if special or  
custom design.  
Blank if standard  
SM1 = Gold Plated  
SM2 = Solder Plated  
SM3 = Solder Dippe  
S
= Customer Specified  
d
10161 Rev A  
E
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com