MB88155 Datasheet, PDF (1/27 Pages) Fujitsu Component Limited. – Spread Spectrum Clock Generator

MB88155
Spread Spectrum Clock Generator
MB88155 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. For modulation, the
MB88155 supports both center-spreading and down-spreading. It has a non-modulated clock output pin (REFOUT) as well as a
modulated clock output pin (CKOUT) .
Features
■ Input frequency : 12.5 MHz to 50 MHz (Multiplied by 1)
12.5 MHz to 20 MHz (Multiplied by 4)
■ Output frequency : CKOUT 12.5 MHz to 80 MHz
REFOUT The same as input frequency (not multiplied)
■ Modulation rate :  0.5,  1.0 (center spread) ,  1.0,  2.0 (Down spread)
■ Equipped with oscillation circuit : range of oscillation 12.5 MHz to 40 MHz (Fundamental oscillation)
40 MHz to 48 MHz (3rd overtone)
■ Modulation clock output Duty : 40 to 60
■ Modulation clock cycle  cycle jitter : MB88155-1xx
MB88155-1xx
MB88155-4xx
12.5 MHz to 20 MHz
20 MHz to 50 MHz
less than 150 ps
less than 100 ps
less than 200 ps
■ 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 : 8-pin plastic TSSOP
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-08298 Rev. *A
• San Jose, CA 95134-1709 • 408-943-2600
Revised December 21, 2016