The following document contains information on Cypress products. FUJITSU MICROELECTRONICS DS04-29127-3E DATA SHEET ASSP Spread Spectrum Clock Generator MB88151A DESCRIPTION MB88151A is a clock generator for EMI (Electro Magnetic Interference) reduction. The peak of unnecessary radiation noise (EMI) can be attenuated by making the oscillation frequency slightly modulate periodically with the internal modulator. It corresponds to both of the center spread which modulates frequency in modulation off as Middle Centered and down spread which modulates so as not to exceed frequency in modulation off. FEATURES MB88151A- MB88151A- MB88151A- MB88151A- MB88151A- 100/101 200/201 400/401 500/501 800/801 (multiply-by-1) (multiply-by-2) (multiply-by-4) (multiply-by-1/2) (multiply-by-8) Input frequency/ 16.6 MHz to 33.4 MHz/ 16.6 MHz to 33.4 MHz/ 16.6 MHz to 33.4 MHz/ 16.6 MHz to 33.4 MHz/ 8.3 MHz to 16.7 MHz Output 16.6 MHz to 33.4 MHz 33.2 MHz to 66.8 MHz 66.4 MHz to 133.6 MHz 8.3 MHz to 16.7 MHz 66.4 MHz to 133.6 MHz frequency Modulation clock Less than100 ps Less than 100 ps Less than 150 ps Less than 200 ps Less than 150 ps cycle-cycle jitter Modulation rate : 0.5%, 1.5% (Center spread), 1.0%, 3.0% (Down spread) Equipped with oscillation circuit : Range of oscillation 8.3 MHz to 33.4 MHz Modulation clock output Duty : 40% to 60% Low current consumption by CMOS process : 5 mA (24 MHz : Typ-sample, no load) Power supply voltage : 3.3 V 0.3 V Operating temperature : 40 C to + 85 C Package : SOP 8-pin Copyright2007-2009 FUJITSU MICROELECTRONICS LIMITED All rights reserved 2009.6