General Description
The DS1089L is a clock generator that produces a spread-spectrum (dithered) square-wave output of frequencies from 130kHz to 66.6MHz. The DS1089L is shipped from the factory programmed at a specific frequency. The DS1089L is pin-for-pin compatible with the DS1087L, however, the DS1089L dithers at equal percentages above and below the center frequency. The user still has access to the internal frequency divider, selectable ±1%, ±2%, ±4%, or ±8% dithered output, dithering rate, and programmable output power-down/disable mode through an I2C-compatible programming interface. All the device settings are stored in nonvolatile (NV) EEPROM allowing it to operate in stand-alone applications. The DS1089L also has power-down and output-enable control pins for power-sensitive applications.

Features
● Factory-Programmed Square-Wave Generator from 33.3MHz to 66.6MHz
● Center Frequency Remains Constant Independent of Dither Percentage
● No External Timing Components Required
● EMI Reduction
● Variable Dither Frequency
● User Programmable Down to 130kHz with Divider (Dependent on Master Oscillator Frequency)
● ±1%, ±2%, ±4%, or ±8% Selectable Dithered Output
● Glitchless Output-Enable Control
● I2C-Compatible Serial Interface
● Nonvolatile Settings
● Power-Down Mode
● Programmable Output Power-Down/Disable Mode

Applications
● Printers
● Copiers
● Computer Peripherals
● POS Terminals
● Cable Modems