Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF HTML

CX4 Datasheet(PDF) 2 Page - RSG Electronic Components GmbH

Part No. CX4
Description  Fundamental Mode: 600 kHz to 1.4 MHz Overtone: 1.8432 MHz - 2.5 MHz Ultra-Miniature Low Profile Surface Mount Quartz Crystal
Download  2 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  RSG [RSG Electronic Components GmbH]
Homepage  http://www.rsg-electronic.de
Logo 

CX4 Datasheet(HTML) 2 Page - RSG Electronic Components GmbH

   
Zoom Inzoom in Zoom Outzoom out
 2 / 2 page
background image
CX4
S
C
SM1
1.8432M
,
500
/
M
TYPICAL APPLICATION
FOR A PIERCE OSCILLATOR
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).
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 CX4 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
C
G
C
D
R
A
CX4
XTAL
OSC
Freq (f )
O
R
f
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
f0 = fS
[1+
C
1
]
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)
RSG Electronic Components GmbH - Sprendlinger Landstr. 115 - 63069 Offenbach - Germany - www.rsg-electronic.de
YS
TEM C
ERTIF
IC
A
T
01
10161 Rev A
HOW TO ORDER CX4 CRYSTALS
C = Ceramic Lid
Blank = Glass Lid
“S” if special or
custom design.
Blank if standard
SM1 = Gold Plated
SM2 = Solder Plated
SM3 = Solder Dippe
d
Operating Temp. Range:
C = -10
OC to +70OC
I
= -40
OC to +85OC
M = -55
OC to +125OC
S = Customer Specified
Frequency
K = kHz
M = MHz
Calibration
Tolerance
@25
OC
(in ppm)
SPECIFICATIONS
Specifications are typical at 25
OC unless otherwise noted.
Specifications are subject to change without notice.
Parameters
Fundamental
Overtone
Frequency, (Hz)
600 K 1.0 M
1.4 M 1.8432 M 2.4576 M
Motional Resistance, R1 (Ω)
300
400
600
500
1000
Motional Resistance, R1 MAX
3K
Motional Capacitance, C1 (fF)
3.5
2.0
1.3
3.5
1.5
Quality Factor, Q (k)
250
200
150
80
45
Shunt Capacitance, C0 (pF)
1.0
0.8
0.7
1.0
0.8
Standard Calibration
500 ppm ( 0.05%)
Tolerance*
1000 ppm ( 0.1%)
10000 ppm ( 1.0%)
Drive Level
3
µW MAX
Load Capacitance, CL**
7pF
Turning Point, T0**
35
OC
Temperature Coefficient, k
-0.035 ppm/
OC2 TYP
Note: Frequency f at temperature T is related to frequency f0 at
turning point temperature T0 by:
Functional Mode
Extensional
Aging, first year
5ppm MAX
Shock, survival
1500 g peak, 0.3 ms, 1/2 sine
Vibration, survival
20 g RMS, 10-2,000 Hz random
Operating Temp. Range
-10
OC to +70OC (Commercial)
-40
OC to +85OC (Industrial)
-55
OC to +125OC (Military)
Storage Temp. Range
-55
OC to +125OC
Max Process Temperature
260
OC for 20 sec.
*Tighter tolerances available
**Other values available
NOTE: All values subject to change without notice.
+
_
+
_
+
_
+
_
+
_
+
_
f-f0
=
k(T-T0)
2
f0
PACKAGING OPTIONS
CX4
- Tray Pack
- Tape and Reel
(Reference tape and reel data sheet 10109)
TERMINATIONS
Designation
Termination
SM1
Gold Plated
SM2
Solder Plated
SM3
Solder Dipped


Html Pages

1  2 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn