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| TOKEN ZTBY 375- 250 KHz Ceramic Resonators Surface Mountable Ceramic Resonators Surface Mountable Formed Leads Ceramic Resonators (Murata CSBF Compatible) Preview Token manufactures a broad range of high quality Ceramic Resonators covering both the KHz and Mhz frequency ranges and a full range of industry standard Through Hole and Surface Mount resonators both with and without internal capacitors. The high quality and extensive coverage of this product line allows optimum design of almost any oscillating circuit.wide variety of applications. The surface mountable Ceramic resonators (ZTBY) is one of ZTB device series with the frequency range of 375 kHz to 1,250 kHz. Initial frequency tolerance is 0.5% which compares very favorably to the norminal 2% ~ 3% requirements of one chip microprocessors. Stability and Aging Tolerance narrows to 0.3%. The ZTBY Resonator provides reliable start up and stable oscillation in microprocessor circuits across a wide variety of applications. The ZTBY Ceramic resonators stand between quartz crystal oscillators and LC/RC oscillators in regard to accuracy but are considerably smaller, require no adjustments, have improved start-up times, and are low in cost. The ZTBY oscillation is dependent upon mechanical resonance associated with their piezoelectric crystalline structure and utilizes the area vibration mode of the piezoelectric element. Token ZTBY resonators conform to the RoHS directive. Application of specific designs also available including different tighter tolerances specification adjusted to frequency requirements. Please contact our sales for more information. Version 2010 http://www.token.com.tw/ rfq token.com.tw 01 of 03 TOKEN W ZTB 455Y T ZTBY 375- 250 KHz Ceramic Resonators Dimensions (Unit: mm Tolerance: 0.3mm) H +0.1 0 -0.4 T10.1 S 2.0 T20.03 1.0 Frequency Range (kHz) 375~429 430~509 510~699 700~1250 W width 8.0 7.5 7.0 5.0 T thickness 3.5 3.3 3.0 2.2 H height 9.0 8.5 8.5 6.0 S lead space 5.0 5.0 5.0 2.5 T1 1.0 1.1 1.1 0.8 T2 0.15 0.15 0.15 0.12 Technical Characteristics Part Number ZTB375 ~ 429Y ZTB430 ~ 509Y ZTB510 ~ 699Y ZTB700 ~ 999Y ZTB1000 ~ 1250Y Frequency Accuracy (at 25C) 2kHz 2kHz 2kHz 0.5% 0.5% Resonant Stability in Impedance Temperature () (-20C~+80C)(%) 20 0.3 20 0.3 30 0.3 70 0.3 100 0.3 Aging For 10 Years (%) 0.3 0.3 0.3 0.3 0.3 Load Capacitance (pF) C1 120 100 100 100 100 C2 470 100 100 100 100 02 of 03 http://www.token.com.tw/ rfq token.com.tw Version 2010 TOKEN ZTBY 375- 250 KHz Ceramic Resonators VDD IC 1M IC Output (ZTBY) Resonator Selection - Test Circuit for MOS IC Loading Capacitor (C1 & C2) The stability of the oscillation circuit is mainly determined by the C1 & C2 values. If the load capacitance is too small, unstable oscillation will occur because of oscillation waveform distortion. If too high, a stop in oscillation can be expected. When comparing the same IC, oscillation circuits with lower frequencies require higher capacitance. C1 X C2 IC:1/6TC4069UBPx2 X: Ceramic Resonator VDD:+5V C1C2:Load Capacitance Feedback Resistor (R = 1M): A Feedback Resistor is used to determine the oscillation circuit bias. The feedback resistance will contribute to instability if it is too large by reducing feedback. Conversely, if it is too small, increases in current will be realized thereby reducing gain. Recent developments in IC design allows for the integration of the feedback resistor in many cases. Token Engineers can help with the circuit design if needed. (ZTBY) Resonator Optimization - IC Evaluations Tolerance is determined by the design of the resonator. However stability and correlation is determined by the IC evaluation. The microcontroller is evaluated with the ceramic resonators to determine the best possible circuit conditions to achieve stability and stable oscillation. In addition, frequency correlation is measured to meet the tight initial frequency tolerance required. For the tight tolerance resonators the IC evaluation must be completed on the final circuit board layout. The final circuit boards provide the most accurate measurement of the frequency correlation. This measurement will account for the effects of stray capacitance on the oscillation frequency. Once the correlation is determined the frequency of the resonator is adjusted to compensate for the correlation. How to Orders ZTB Part Number 455 Y P Center Frequency (KHz) SMD type Packaging Code Package P TR Bulk Taping Reel Back to 1st Page - Ceramic Surface Mountable Ceramic Resonators Version 2010 http://www.token.com.tw/ rfq token.com.tw 03 of 03 |
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