ASM3P2669A

Generates an EMI optimized clock signal at the output.  
Integrated loop filter components.  
Operates with a 3.3V /2.5V supply.  
Operating current less than 4mA.  
Low power CMOS design.  
Input frequency range : 6MHz to 12MHz  for 2.5V 
                                       : 6MHz to 13MHz for 3.3V    
Generates a 1X low EMI spread spectrum clock of the input frequency.  
Frequency deviation: ±1% @ 10MHz  
Available in 6-pin TSOT-23, 8-pin SOIC and 8-pin TSSOP packages.

The ASM3P2669A is targeted towards all portable devices with very low power requirements like MP3 players and digital still cameras.

The ASM3P2669A is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. That reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of  all clock dependent signals. The ASM3P2669A allows significant system cost savings by reducing the number of circuit board layers ferrite beads,  shielding that are traditionally required to pass EMI regulations.

The ASM3P2669A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all digital method.  
 
The ASM3P2669A modulates the output of a single PLL in order to "spread" the bandwidth of a synthesized clock, and more importantly, decreases the peak amplitudes of its harmonics. ASM3P2669A results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most frequency generators. Lowering EMI by increasing a signal's bandwidth is called 'spread spectrum clock generation'.