P2781 Overview
The P278xA is a versatile spread spectrum frequency modulator designed specifically for digital camera and other digital video and imaging applications. The P278xA reduces electromagnetic interference (EMI) at the clock Applications The P278xA is targeted towards MFP, xDSL, fax modem, set-top box, USB controller, DSC, and embedded systems. Block Diagram FS0 FS1 LF VDD PLL Modulation XIN / CLKIN XOUT Crystal...
P2781 Key Features
- Provides up to 15dB of EMI suppression
- FCC approved method of EMI attenuation
- Generates a 1X, 2X, and 4X low EMI spread spectrum clock of the input frequency
- Input frequency range from 3 to 78MHz
- External loop filter for spread % adjustment
- Spreading ranges from ±0.25% to ±5.0%
- Ultra low cycle-to-cycle jitter
- Zero-cycle slip
- 3.3V operating voltage range
- Ultra-low power CMOS design
