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51MI50LF Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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51MI50LF Datasheet(HTML) 1 Page - Integrated Circuit Systems |
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1 / 8 page  ICS7151 MDS 7151 E 1 Revision 012306 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com Spread Spectrum Clock Generator Description The ICS7151-10, -20, -40, and -50 are clock generators for EMI (Electro Magnetic Interference) reduction (see below for frequency ranges and multiplier ratios). Spectral peaks can be attenuated by slightly modulating the oscillation frequency. Both down and center spread profiles are selectable. Down spread maintains an average frequency less than an unspread clock, and will not exceed the maximum frequency of an unspread clock. Features • Operating voltage of 3.3 V ±0.3 V • Packaged in 8-pin SOIC • Available in Pb (lead) free package • Input frequency range of 16.5 to 33.4 MHz • Output frequency ranges of 8.3 to 16.7 MHz, 16.5 to 33.4 MHz, 33.3 to 66.7 MHz, 66.6 to 133.4 MHz • Provides a spread spectrum clock output (±0.5%, ±1.5% center spread; -1.0%, -3.0% down spread) • Multiplication rates of x1/2, x1, x2, and x4 • Advanced, low-power CMOS process Block Diagram Product Lineup Product Input Frequency Range Multiplier Ratio Output Frequency Range ICS7151M-10, ICS7151MI-10 16.5 MHz to 33.4 MHz X1 16.5 MHz to 33.4 MHz ICS7151M-20, ICS7151MI-20 16.5 MHz to 33.4 MHz X2 33.3 MHz to 66.7 MHz ICS7151M-40, ICS7151MI-40 16.5 MHz to 33.4 MHz X4 66.6 MHz to 133.4 MHz ICS7151M-50, ICS7151MI-50 16.5 MHz to 33.4 MHz X1/2 8.3 MHz to 16.7 MHz PLL Clock Synthesis and Spread Spectrum Circuitry S1:0 ENS CKOUT 2 GND VDD Clock Buffer/ Crystal Ocsillator XIN XOUT External caps required with crystal for accurate tuning of the clock |
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