P2781集成电路（IC）的时钟发生器PLL频率合成器规格书PDF中文资料

Product Description

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 source, which provides system wide reduction of EMI of all clock dependent signals. The P278xA allows significant system cost savings by reducing the number of

circuit board layers and shielding that are traditionally required to pass EMI regulations.

特性 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

10 mA output drives

TTL or CMOS compatible outputs

Ultra-low power CMOS design

P278XA is available in 8 pin SOIC and TSSOP Packages

Available for industrial and automotive temperature ranges.

Applications

The P278xA is targeted towards MFP, xDSL, fax modem, set-top box, USB controller, DSC, and embedded systems.