General Description
The DS1090 is a low-cost, dithered oscillator intended to be used as an external clock for switched-mode power supplies and other low-frequency applications. The dithering or sweeping function reduces peak-radiated emissions from the power supply at its fundamental frequency, as well as harmonic frequencies. The device consists of a resistor-programmed master oscillator, factory-programmed clock prescaler, and a pin-programmed dither circuit.

Features
● Low-Cost, Spread-Spectrum EconOscillator™
● Simple User Programming
● Output Frequency Programmable from 125kHz to 8MHz
● Dither Percentage Programmable from 0% to 8%
● Dither Rate Programmable (fMOSC/512, 1024, 2048, or 4096)
● 3.0V to 5.5V Single-Supply Operation
● CMOS/TTL-Compatible Output
● Operating Temperature Range: -40°C to +85°C

Applications
● Switched-Mode Power Supplies
● Servers
● Printers
● Embedded Microcontrollers
● Industrial Controls