The ASM3P28XX devices are versatile spread spectrum frequency modulators designed specifically for a wide range of input clock frequencies from 10 MHz to 40 MHz. The ASM3P28XX can generate an EMI reduced clock from crystal, ceramic resonator, or system clock. The ASM3P28XX-A and the ASM3P28XX-B offer various combinations of spread options and percentage deviations. These combinations include Down and Center Spread, and percentage deviation range from ±0.625% to -3.5%.
The ASM3P28XX reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of down stream clock and data dependent signals. The ASM3P28XX allows significant system cost savings by reducing the number of circuit board layers, ferrite beads, shielding, and other passive components that are traditionally required to pass EMI regulations.

• Internal loop filter
• Generates a 1x, 2x and 4x low EMI spread spectrum clock of the input frequency
• Selectable spread options:Down Spread and Center Spread
• CMOS/TTL compatible inputs and out
• LVDS interfaces in mobile graphic
• chipsets