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 master, ranging from 8.2MHz to 133MHz.

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