ASM3P2180A

September 2004 www.DataSheet4U.com ASM3P2180A Peak Reducing EMI Solution typical narrow band signal produced by oscillators and most clock generators. Lowering EMI by increasing a signal’s bandwidth is called spread spectrum clock generation. The ASM3P2180A uses the most efficient and optimized modulation profile approved by the FCC and is implemented by using a proprietary all-digital method. Applications The ASM3P2180A is targeted towards notebook LCD displays, other displays using an LVDS interface, PC peripheral devices and embedded systems. Key Specifications Description Supply voltages Frequency range FS1=0 FS1=1 Specification VDD = 3.3V ± 5% 6 MHz ≤ Fin ≤10 MHz 18 MHz ≤ Fin ≤ 30 MHz 325 pS (max) -1.25% or –2.4% 45/55% (worst case) 5ns (maximum) rev 1.0 Features 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 ...