IMIFS781BZB Cypress Semiconductor Corp, IMIFS781BZB Datasheet
IMIFS781BZB
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IMIFS781BZB Summary of contents
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... Programmable EMI reduction • Fast time to market • Lower cost of compliance • No degradation in rise/fall times • Lower component and PCB layer count Cypress Semiconductor Corporation Document #: 38-07029 Rev. *F Low EMI Spectrum Spread Clock Functional Description The Cypress FS781/82/84 are Spread Spectrum clock ...
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Block Diagram 250 K Reference Xin 1(3) Divider 8 pF Modulation Control Xout 2( Power Contol VDD VDD Input Control Logic 8(2) Logic 5(7) 3(5) VSS S1 Pin Description Pin Name I/O 1/2 (SOIC I/O Analog ...
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Table 2. FS781/82/84 Recommended Loop Filter Values C7 (pF) @ +3.3 VDC ±5% (R6 = 3.3K) [3] Input MHz 1. 10,000/1000 10,000/330 1040 830 ...
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Table 3. FS781/82/84 Recommended Loop Filter Values C7 (pF) @ +5.0 VDC ±5% (R6 = 3.3K) [3] Input MHz 1. 1140 1170 1030 760 ...
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Table 4. Modulation Rate Divider Ratios SSCG Modulation Profile The digital control inputs S0 and S1 determine the modulation frequency of FS781/2/4 products. The input frequency is divided by a ...
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ns. Figure 2. 20-MHz Unmodulated Clock From the above parameters, the output clock at FSOUT will be sweeping symmetrically around a center frequency of 20 MHz. The minimum and maximum extremes of this clock will ...
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Crystal is 20 MHz is 1st Order with 18 pF load capacitance. If Crystal load capacitance different than 18 pF, C1 and C2 must be re-calculated. For third overtone crystals, a parallel or series resonant trap is ...
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Absolute Maximum Ratings This device contains circuitry to protect the input against damage due to high static voltages or electric fields; however, precautions should be taken to avoid application of any voltage higher than the absolute maximum rated voltages ...
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... Ordering Information Part Number IMIFS781BZB 8-pin 150-mil SOIC IMIFS781BZBT 8-pin 150-mil SOIC – Tape and Reel IMIFS782BZB 8-pin 150-mil SOIC IMIFS782BZBT 8-pin 150-mil SOIC – Tape and Reel IMIFS784BZB 8-pin 150-mil SOIC IMIFS784BZBT 8-pin 150-mil SOIC – Tape and Reel IMIFS781BT 8-pin (4 ...
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Marking Example Cypress FS781BS Date Code, Lot # Package Drawing and Dimensions 8 Lead (150 Mil) SOIC S08 0.189[4.800] 0.196[4.978] 0.050[1.270] BSC 0.0138[0.350] 0.0192[0.487] Document #: 38-07029 Rev. *F Cypress FS781BT Date Code, Lot # FS781 ...
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... Document #: 38-07029 Rev. *F © Cypress Semiconductor Corporation, 2005. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress ...
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Document History Page Document Title: FS781/82/84 Low EMI Spectrum Spread Clock Document Number: 38-07029 REV. ECN NO. Issue Date ** 106948 06/07/01 *A 111654 02/27/02 *B 118355 08/30/02 *C 122679 12/14/02 *D 277189 See ECN *E 314274 See ECN *F ...