ASM3P2180A
Overview
- Generates an EMI optimized clocking signal at the output.
- Selectable output frequency range.
- Single 1.25% or 2.4% down spread output.
- Integrated loop filter components.
- Operates with a 3.3V supply.
- Low-power CMOS design.
- Available in 8-pin SOIC and 8-pin TSSOP packages. Product Description The ASM3P2180A is a versatile Spread Spectrum frequency modulator designed specifically for a wide range of clock frequencies. The ASM3P2180A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The ASM3P2180A allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass EMI regulations. The ASM3P2180A modulates the output of a single PLL in order to “spread” the bandwidth of a synthesized clock, thereby decreasing the peak amplitudes of its harmonics. This results in significantly lower system EMI compared to the Simplified Block Diagram Cycle-to-cycle jitter Selectable spread percentage Output duty cycle Output rise and fall time
