CIRCUIT DESIGN
SPECIFICATIONS
o
A conventional CMOS Pierce Oscillator is shown below.
The crystal oscillates at a frequency fO above the crystal’s
Specifications are typical at 25 C unless otherwise noted.
Specifications are subject to change without notice.
series-resonant frequency f . The crystal is effectively
10 MHz 32MHz 155.52 MHz
s
inductive and, in combination with RA, Cd and Cg in the
feedback loop, provides approximately 180O phase shift
necessary to obtain oscillation. Typical component values
for a Pierce Oscillator using a 16 MHz crystal with a
74HC04 hex inverter are shown below:
Motional Resistance R1 (
Motional Capacitance C1 (fF) 5.5
Quality Factor Q (k) 80
Shunt Capacitance C (pF) 2.2
⍀
) 50
20
50
7.8
0.5
41
36
2.6
3.2
o
Typical Application as Pierce Oscillator
Using 74HC04 CMOS Hex Inverter at 5 VDC
Calibration Tolerance*
A
B
C
+_ 0.01% ( +_ 100ppm)
+_ 0.1%
+_ 1.0%
Load Capacitance
Drive Level
20 pF (Unless specified by customer)
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
500 W MAX.
+
Frequency-Temperature
Stability**
-10OC to +70OC from _ 10ppm
Rf
+
-40OC to +85OC from _ 20ppm
+
-55OC to +125OC from _ 30ppm
BUFFER
OSC
Aging, first year
Shock, survival***
Vibration, survival
5ppm MAX.
3,000g, .3 msec., 1/ 2 sine
RA
Freq (f )
20g rms, 10-2,000 Hz random
AMPLIFIER
CS
O
Operating Temperature
Range
-10OC to +70OC Commercial
-40OC to +85OC Industrial
-55OC to +125OC Military
Contact factory for
design guidelines
-55OC to +125OC
CG
Storage Temperature
CD
CX-1
Note: The characteristics of the frequency temperature stability follow that of AT
cut thickness-shear mode*
+
* Tighter tolerances available as low as _ 5 ppm
** Does not include calibration tolerance
*** Higher shock version available, refer to data sheet model CX-1HG (10108)
STANDARD FREQUENCIES
10.0
11.0592 MHz
12.0 MHz
14.318 MHz
MHz
19.6608 MHz
32.0
MHz
20.0
24.0
MHz
MHz
35.2512 MHz
PACKAGING
36.0
40.0
MHz
MHz
24.576 MHz
CX-1-03 - Tray Pack (Standard)
16.0
MHz
30.0
MHz
HOW TO ORDER CX-1-03 CRYSTALS
CX-1
-03
32 MHz
(
25ppm
/
25ppm
Frequency
Stability over Tolerance
Temp. Range
/
50ppm
/
I
)
“S” if special or O.T.=3RD O.T. Mode C=Ceramic Lid
custom design. Blank=Fundamental Blank=Glass Lid
Blank if Std.
Frequency
Calibration
Tolerance*
@25OC
(A)
Total Frequency Temp. Range:
C = Commercial
Mode
I = Industrial
M = Military
S = Specify
(B)
(C)
*Other calibration fill in ppm.
10127 - Rev D
RSG Electronic Components GmbH, Sprendlinger Landstr. 115, 63069 Offenbach, Germany, Tel. +49 69 - 984047-0, Fax: +49 69 - 9840-77, www.rsg-electronic.de
RSG [ RSG ELECTRONIC COMPONENTS GMBH ]
