CX-1SC-031.0B

CX MINIATURE CRYSTALS 530kHz to 2.1MHz MINIATURE QUARTZ CRYSTAL FOR PARALLEL OSCILLATORS EURO QUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk CX-1-03 Page 1 of 2 General Description The CX-1 quartz crystal is a high quality extensional mode resonator. The CX-1 is hermetically sealed in a rugged, miniature ceramic package, a quarter of the size of an eight pin dual-in-line package. The crystal is manufactured utilizing a photo-lithographic process, ensuring consistency and repeatability of electrical characteristics. 0.7        Extensional mode Ideal for use with microprocessors Designed for low-power applications Compatible with hybrid packaging Low ageing Full military environmental testing available Ideal for battery operated applications Specification 530kHz to 2.1MHz Extensional A ±0.05% (±500ppm) B ±0.1% C ±1.0% 7pF Load Capacitance: 3kW max. Motional Resistance (R): 1.2fF Motional Capacitance (C): 150,000 Quality Factor (Q): 1.0pF max. Shunt Capacitance (C): 3mW max. Drive Level: 35°C Turning Point (T)**: -0.035ppm/°C Temperature Coefficient (k): Note: Frequency deviation (f) from frequency (fo) @ turning point f-fo k(T-To) temperature (To): = Frequency Range: Functional Mode: Calibration Tolerance*: 2 7.6 8.1 2 .0 3.8 3.8 Outline and Dimensions Equivalent Circuit L R 1 C C 2 L  Motional Inductance C  Motional Capacitance C Shunt Capacitance R  Motional Resistance ±5ppm max. 750g 0.3ms, ½ sine 10g rms 10-1,000Hz random -10°~+70°C (commercial) -40°~+85°C (industrial) -55°~+125°C (military) -55°C~+125°C Storage Temperature: Lead to Package temp. not to Process Temperature: exceed 175°C Glass lid to package seal rim temp. not to exceed 210°C Specifications are typical at 25°C unless otherwise indicated. * Closer calibration available ** Other turning point available Ageing, first year: Shock: Vibration, survival: Operating Temperature: fo CX MINIATURE CRYSTALS 530kHz to 2.1MHz MINIATURE QUARTZ CRYSTAL FOR PARALLEL OSCILLATORS EURO QUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk CX-1-03 Page 2 of 2 Typical Application Typical application for Pierce oscillator The low-profile CX miniature leaded crystal is ideal for small, high density, battery operated portable products. A CX crystal incorporated into a Pierce oscillator (single inverter) circuit provides a high stability with low current consumption. A conventional HCMOS Pierce oscillator circuit is shown below. The crystal is effectively inductive and in a Pi-network circuit with C and C providing the additional phase shift necessary to sustain oscillation. The oscillation frequency (f ) is 15 to 150ppm above the crystals series resonant frequency (f ). 1 2 0 S Conventional HCMOS Pierce Oscillator Circuit RB Amplifier Buffer Osc. Freq. (Fo) Drive Level A C5 R) R is used to limit the crystal’s drive level by forming a voltage divider between R and C . R also stabilizes the oscillator against changes in the amplifier’s output resistance (R ). R should be increased for higher voltage operation. A 1 A 0 A C CX-1 C Load Capacitance L The CX crystal calibration tolerance is influenced by the effective circuit capacitances, specified as the load capacitance (C ). C is approximately equal to: L Packaging CX-1-03 - Tray Pack (Standard) C x C2 CL = 1 C C1 + C2 + S NOTE: C and C include stray layout capacitance to ground. C is the stray shunt capacitance between the crystal terminals. In practice, the effective valus of C will be less than that calculated from C , C , and CS values due to the effect of the amplifier output resistance. C should be minimized. The oscillation frequency (f ) is approximately equal to: 1 2 S L 1 2 S 0 f 0 = f S 1+ S C1 2(C0 + CL ) Where F = Series resonant frequency of the crystal C = Motional Capacitance C = Shunt Capacitance 1 0 Order Code CX-1 Blank = Glass Lid C = Ceramic Lid Frequency -03 1.0MHz (A / I) Temperature Range: C = Commercial I = Industrial M = Military S = Specify “S” if special or custom design Blank if standard Side leads Calibration Tolerance* @ 25°C (A) *For other calibrations (B) (C) insert value in ppm