1089L

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 powerdown/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 powersensitive 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

Automotive Infotainment
Printers
Copiers
Computer Peripherals
POS Terminals
Cable Modems