Description
P2781/82/84 General Purpose EMI Reduction IC .
The P278xA is a versatile spread spectrum frequency modulator designed specifically for digital camera and other digital video and imaging application.
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
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 Oscillator
Frequency Divider Feedba