CX4 STATEK | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
0.059 (1.5) 0.160 (4.0) 0.092 (2.3) inches (mm) STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com SYSTEM CERTIFICATION ISO 9001 A B F D D TOP BOTTOM C E TYP. MAX. DIM inches mm inches mm A 0.197 5.00 0.210 5.33 B 0.072 1.83 0.085 2.16 C- - see below D 0.038 0.97 0.048 1.22 E 0.020 0.51 - - F 0.025 0.64 - - DIM “C” GLASS LID CERAMIC LID MAX inches mm inches mm SM1 0.045 1.14 0.050 1.27 SM2 0.046 1.17 0.051 1.30 SM3 0.048 1.22 0.053 1.35 PACKAGE DIMENSIONS SUGGESTED LAND PATTERN actual size side view SXXXX Ceramic Lid Shown
10161 Rev A
DESCRIPTION
STATEK’s CX4 quartz crystals are hermetically sealed in an ultra-miniature low profile surface mount ceramic package. This high quality quartz resonator forms the basis of a stable oscillator.
FEATURES
Designed for low power applications in this frequency range Smallest available package in this frequency range Hermetically sealed ceramic package Excellent aging characteristics Full military testing to MIL-PRF-3098 available Designed and manufactured in the USA
APPLICATIONS
Pacemaker, defibrillator and hearing aid Industrial, Computer & Communications PCMCIA (FAX, Modem and LAN) Smart Card Military & Aerospace Airborne hybrid computer Low power system clock Hybrid multi-chip modules C1 R1 21 L1 EQUIVALENT CIRCUIT R1 Motional Resistance L1 Motional Inductance C1 Motional Capacitance C0 Shunt Capacitance CX4 CRYSTAL Fundamental Mode: 600 kHz to 1.4 MHz Overtone: 1.8432 MHz - 2.5 MHz Ultra-Miniature Low Profile Surface Mount Quartz Crystal
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 C D and CG provides the additional phase shift necessary to sustain oscillation. The oscillation frequency (f 0) 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 (R 0). 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 (C L). 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 CX4 XTAL OSC Freq (f )O Rf CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT f0 = fS [1+ C1 ]2(C0 + CL) (2) Where fS = Series resonant frequency of the crystal C1 = Motional Capacitance C0 = Shunt Capacitance CL = CD x CG +CS CD + CG (1) STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com SYSTEM CERTIFICATION ISO 9001 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= -40OC to +85OC M= -55OC to +125OC S= Customer Specified Frequency K = kHz M = MHz Calibration Tolerance @25OC (in ppm) SPECIFICATIONS Specifications are typical at 25OC 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 3KΩ Quality Factor, Q (k) 250 200 150 80 45 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) -40OC to +85OC (Industrial) -55OC 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) 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