SY87729LHI Micrel Inc, SY87729LHI Datasheet
SY87729LHI
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SY87729LHI Summary of contents
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Micrel, Inc. FEATURES Fractional synthesizer from 10MHz to 365MHz from a single 27MHz reference oscillator Generates exactly the correct frequency for common transport protocols with or without FEC Directly enables SY87721L to lock onto any data rate within its range ...
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... GND Ground GNDA Analog Ground NC These pins are to be left unconnected 2 AnyClock ® SY87729L Package Lead Marking Finish SY87729LHI Sn-Pb SY87729LHI Sn-Pb SY87729LHY with Matte-Sn Pb-Free bar line indicator Pb-Free SY87729LHY with Matte-Sn Pb-Free bar line indicator Pb-Free = 25°C, DC Electricals only. A ...
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Micrel, Inc. SYSTEM BLOCK DIAGRAM FIBER PIN DIODE TIA REF_OSC SY889x2 FIBER LASER LASER DIODE DIODE DRIVER M9999-062807 hbwhelp@micrel.com or (408) 955-1690 SY889x3 SY87721L AnyRate POST AMP CDR SY87729L CMU One REF_CLK ® AnyClock Fractional Synthesizer 8 bits UP 3 ...
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Micrel, Inc. FUNCTIONAL BLOCK DIAGRAM Center Frequency Trim REFCLK Phase- Frequency Detector Fractional-N Control M Divider PROGCS µWire PROGDI Interface PROGSK Aquisition Sequencer M9999-062807 hbwhelp@micrel.com or (408) 955-1690 Charge Pump Fine FN Delta Phase P/(P-1) Divider WR Delta Phase Phase- ...
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Micrel, Inc. DESCRIPTION General ® The SY87729L AnyClock Fractional-N Synthesizer is used in serial data streaming applications, where the incoming data rate on a channel may vary, or where the incoming data rate on a channel is unknown ahead of ...
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Micrel, Inc Figure 2. 11/3 Example Figure 2 shows an example generating an output 2 frequency 3 / times the input frequency. Since the output 3 frequency is between 3 and ...
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Micrel, Inc. In the general case, the pattern “101” need not change based on the P divider value. To multiply by 14/3 instead of 11/3, for example, the same “101” pattern would be used, but we would alternate dividing by ...
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Micrel, Inc. Lock Detector The SY87729L ensures proper operation of both synthesizers by verifying that both PLL have achieved lock. The LOCKED output asserts active high only when this is the case, that is, both PLL are locked. The SY87729L ...
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Micrel, Inc. P Divider The output of the wrapper synthesizer is post divided down before appearing at the CLKOUT± pins. Notice that, given the range of the wrapper VCO (540MHz to 729MHz) and the maximum and minimum division ratios of ...
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Micrel, Inc. Standard Protocol Applications From a single 27.000MHz reference input, the SY87729L can generate exactly correct frequencies for at least the 18 protocols listed in Table 7. This table also shows how to Protocol SY87729L Fout (MHz) ETR OC-1 ...
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Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) ................................... –0.5V to +4.0V CC Input Voltage(V ) ....................................... –0. ECL Output Current (I ) OUT Continuous .......................................................... 50mA Surge ................................................................. 100mA Lead Temperature (soldering, 20 sec.) ...................... ...
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Micrel, Inc. AC ELECTRICAL CHARACTERISTICS 3.3V ±5%; GND = GNDA = 0V CCO CCA Symbol Parameter t REFCLK Input Rise/Fall Times IRF t REFCLK Pulse Width High REFPWH t REFCLK Pulse Width ...
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Micrel, Inc. TIMING WAVEFORMS REFCLK CLKOUT t CSSK PROGCS PROGSK PROGDI Valid M9999-062807 hbwhelp@micrel.com or (408) 955-1690 t t REFPWL REFPWH t t CLKPWH CLKPWL t SKP t t SKPWH SKPWL Valid 13 AnyClock SY87729L t SKCS t DIH t ...
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Micrel, Inc. 32-PIN EPAD-TQFP (DIE UP) (H32-2) PCB Thermal Consideration for 32-Pin EPAD-TQFP Package MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this datasheet is believed to ...