DS1085

www.maxim-ic.com FEATURES § User-Programmable Frequency Synthesizer § Programmable From 8.1kHz to 133MHz § Dual Synchronous Outputs § 8.2MHz to 133MHz Reference Oscillator Output § 8.1kHz to 133MHz Main Oscillator Output § Three Resolution Options § 2-Wire Serial Interface § 0.75% Absolute Accuracy § Nonvolatile (NV) Frequency Settings § Single 5V Supply § No External Timing Components § Power-Down Mode ORDERING INFORMATION DEVICE PACKAGE DS1085Z-10 150mil SO DS1085Z-25 150mil SO DS1085Z-50 150mil SO STEP SIZE 10kHz 25kHz 50kHz DS1085 EconOscillator Frequency Synthesizer PIN ASSIGNMENT OUT1 OUT0 VCC GND 1 2 3 4 8 7 6 5 SO (150mil) SCL SDA CTRL1 CTRL0 PIN DESCRIPTION OUT1 - Main Oscillator Output OUT0 - Reference Oscillator Output VCC GND - Power-Supply Voltage - Ground CTRL1 - Control Pin for OUT1 CTRL0 - Control Pin for OUT0 SDA - 2-Wire Serial Data Input/Output SCL - 2-Wire Serial Clock OSCILLATOR OUTPUT RANGE 8.1kHz to 133MHz 8.1kHz to 133MHz 8.1kHz to 133MHz DESCRIPTION The DS1085 is a dual-output frequency synthesizer requiring no external timing components for operation. It can be used as a standalone oscillator or as a dynamically programmed, processor-controlled peripheral device. An internal master oscillator can be programmed from 66MHz to 133MHz with three resolution options of 10kHz, 25kHz, and 50kHz. A programmable, 3-bit prescaler (divide-by-1, 2, 4, or 8) permits the generation of a reference oscillator output (OUT0) from the m...