ON Semiconductor ASM3P2274AF-06OR

Description
The ASM3P2274 is a versatile Spread Spectrum Frequency Modulator designed for a wide range of clock frequencies. It provides a 4x Spread Spectrum Modulated output from an input clock source. The ASM3P2274A reduces electromagnetic interference (EMI) at the clock source, allowing systemwide reduction of EMI of all clockdependent signals. It enables significant system cost savings by reducing the number of circuit board layers, ferrite beads, and shielding required to pass EMI regulations. The ASM3P2274A uses an efficient and optimized modulation profile approved by the FCC and implemented using a proprietary alldigital method. It modulates the output of a single PLL to "spread" the bandwidth of a synthesized clock and decrease the peak amplitudes of its harmonics, resulting in significantly lower system EMI compared to typical narrowband signals produced by oscillators and most frequency generators.

Features
Generates a 4X EMI optimized clock signal at the output
Integrated loop filter components
Operates with a 3.3/2.5V Supply
CMOS design
Input frequency range: 12MHz to 30MHz for 2.5V, 12MHz to 30MHz for 3.3V
Frequency deviation: 1.5% (Typ) @ 66MHz Output Frequency
Available in 6LTSOP (6LTSOT23) Package

Applications
The ASM3P2274A is targeted towards portable devices such as MP3 players, MFPs, LCD Panel Modules, and digital still cameras.