CX6SM

CX6SM CRYSTAL 800 kHz to 1.35 MHz ™ Ultra-Low Profile (1mm) Miniature Surface Mount Quartz Crystal DESCRIPTION actual size The CX6SM quartz crystals are leadless devices designed for surface mounting on printed circuit boards or hybrid substrates. They are hermetically sealed in a rugged, miniature ceramic package. They are manufactured using the STATEK-developed photolithographic process, and are designed utilizing the experience acquired by producing millions of crystals for industrial, commercial, military and medical applications. Maximum process temperature should not exceed 260OC. FEATURES side view Glass Lid Shown PACKAGE DIMENSIONS D Ultra-low profile (1mm) Extensional mode Ideal for use with microprocessors Designed for low power applications Low aging Full military testing available Ideal for battery operated applications Designed and manufactured in the USA TYP. EQUIVALENT CIRCUIT B C D A TOP BOTTOM MAX. mm 6.73 2.62 1.27 inches 0.280 0.114 0.060 mm 7.11 2.90 1.52 DIM A B C D DIM “C“ inches 0.265 0.103 0.050 C0 1 L1 C1 R1 2 see below GLASS LID inches 0.039 0.041 0.044 mm 0.99 1.04 1.12 CERAMIC LID inches 0.053 0.055 0.058 mm 1.35 1.40 1.47 R1 Motional Resistance L1 Motional Inductance C1 Motional Capacitance C0 Shunt Capacitance MAX SM1 SM2 SM3 SUGGESTED LAND PATTERN 0.070 (1.78) 0.120 (3.05) inches (mm) 0.215 (5.46) 10133 - Rev B S YS ERT T E M C IFIC T A N IO RSG Electronic Components GmbH - Sprendlinger Landstr. 115 - 63069 Offenbach - Germany - www.rsg-electronic.de IS O 90 01 SPECIFICATIONS TYPICAL APPLICATION FOR A PIERCE OSCILLATOR Specifications are typical at 25OC unless otherwise noted. Specifications are subject to change without notice. Frequency Range Functional Mode Calibration Tolerance* 800 kHz - 1.35 MHz Extensional + _ 500 ppm (0.05%) + _ 1000 ppm (0.1%) + _ 10000 ppm (1.0%) Load Capacitance 7 pF (Unless specified by customer) Motional Resistance (R1) 5 kΩ MAX Motional Capacitance (C1) 1.2fF Quality Factor (Q) 150 k Shunt Capacitance (C0) 1.0 pF Drive Level 3 µW MAX Turning Point (T0)** 35OC Temperature Coefficient (k) -0.035 ppm/OC2 Aging, first year 5 ppm MAX Shock, survival 1,000 g peak, 0.3 ms,1/2 sine Vibration, survival 10 g RMS, 20-1,000 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 260OC for 20 sec. Note: Frequency f at temperature T is related to frequency f0 at turning point temperature T0 by: f-f0 2 = k (T-T0) f0 * Tighter tolerances available. ** Other values available. The low profile CX miniature surface mount crystal is ideal for small, high density, battery operated portable products. The CX 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 15 to 150 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 CX 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 + CS (1) 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: PACKAGING f0 = fS 1 + Where f S C1 C0 [ C1 2(C0 + CL) ] (2) CX6SM - Tray Pack - Tape and Reel (Reference tape and reel data sheet 10109) = Series resonant frequency of the crystal = Motional Capacitance = Shunt Capacitance TERMINATIONS Designation SM1 SM2 SM3 Termination Gold Plated Solder Plated Solder Dipped CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT Rf BUFFER HOW TO ORDER CX6SM CRYSTALS CX6 S C SM1 1.0M, Frequency K = kHz M=MHz SM1 = Gold Plated SM2 = Solder Plated SM3 = Solder Dipped 500 Calibration Tolerance @ 25OC (in ppm) / M AMPLIFIER RA OSC Freq (f “S” if special or custom design. Blank if Srd. Operating Temp. Range: C = -10OC to +70OC I = -40OC to +85OC M = -55OC to +125OC S = Customer Specified CG CX6 CD Blank = Glass Lid C = Ceramic Lid 10133 - Rev B S YS ERT T E M C IFIC T A N IO RSG Electronic Components GmbH - Sprendlinger Landstr. 115 - 63069 Offenbach - Germany - www.rsg-electronic.de IS O 90 01