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 XX X X S 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. actual size side view Ceramic Lid Shown PACKAGE DIMENSIONS FEATURES D Designed for low power applications in this frequency range Smallest available package in this frequency range TOP A Hermetically sealed ceramic package BOTTOM F Excellent aging characteristics Full military testing to MIL-PRF-3098 available Designed and manufactured in the USA B E D C APPLICATIONS TYP. Medical Pacemaker, defibrillator and hearing aid Industrial, Computer & Communications PCMCIA (FAX, Modem and LAN) Smart Card Military & Aerospace Airborne hybrid computer DIM inches mm inches mm A 0.197 5.00 0.210 5.33 B 0.072 1.83 0.085 2.16 C - - D 0.036 0.91 0.046 1.16 E 0.020 0.51 - - F 0.025 0.64 - - DIM “C” Low power system clock Hybrid multi-chip modules EQUIVALENT CIRCUIT GLASS LID L1 C1 see below CERAMIC LID MAX inches mm inches mm SM1 0.045 1.14 0.050 1.27 SM2/SM4 0.046 1.17 0.051 1.30 SM3/SM5 0.048 1.22 0.053 1.35 SUGGESTED LAND PATTERN C0 1 MAX. 0.059 (1.5) R1 R1 Motional Resistance L1 Motional Inductance C1 Motional Capacitance C0 Shunt Capacitance 2 0.092 (2.3) 0.160 (4.0) inches (mm) 10161 Rev B STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com TYPICAL APPLICATION FOR A PIERCE OSCILLATOR SPECIFICATIONS Specifications are typical at 25OC unless otherwise noted. Specifications are subject to change without notice. Parameters Fundamental Frequency, (Hz) 600 K 1.0 M Motional Resistance, R1 (Ω) 300 Overtone 1.4 M 1.8432 M 2.4576 M 400 600 Motional Resistance, R1 MAX 500 1000 3KΩ 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%) Tolerance1 + _ 1000 ppm ( +_ 0.1%) + _ 10000 ppm ( +_ 1.0%) Drive Level 3 µW MAX Load Capacitance, CL2 7pF 2 Turning Point, T0 35OC 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: f-f0 2 = k(T-T0) f0 Functional Mode Extensional Aging, first year 5ppm MAX Shock, survival 1500 g, 0.3 ms, 1/2 sine Vibration, survival 20 g RMS, 10-2,000 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 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: CL = CD x CG CD + CG The oscillation frequency (f0) is approximately equal to: [ f0 = fS 1 + Where f S C1 C0 NOTE: All values subject to change without notice. TERMINATIONS Termination Gold Plated Solder Plated Solder Dipped Solder Plated (Lead Free) Solder Dipped (Lead Free) (1) + CS 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. 260OC for 20 sec. 1. Tighter tolerances available 2. Other values available Designation SM1 SM2 SM3 SM4 SM5 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 PInetwork 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). C1 2(C0 + CL) ] = Series resonant frequency of the crystal = Motional Capacitance = Shunt Capacitance CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT Rf BUFFER PACKAGING OPTIONS CX4 (2) - Tray Pack - Tape and Reel AMPLIFIER RA OSC Freq (fO ) (Reference tape and reel data sheet 10109) HOW TO ORDER CX4 CRYSTALS CX4 S C SM1 C = Ceramic Lid Blank = Glass Lid SM1 = Gold Plated “S” if special or SM2 = Solder Plated custom design. SM3 = Solder Dipped Blank if standard SM4 = Solder Plated (Lead Free) SM5 = Solder Dipped (Lead Free) 1.8432M , 500 Frequency K = kHz M = MHz / I Calibration Operating Temp. Range: Tolerance C = -10OC to +70OC @25OC I = -40OC to +85OC (in ppm) M = -55OC to +125OC S = Customer Specified CG CX4 XTAL CD STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com 10161 Rev B