DS1085LZ-5+W

Overview

The DS1085LZ-5+W is a 3.3V EconOscillator frequency synthesizer requiring no external timing components. It features a dual-output architecture with a reference oscillator (OUT0) ranging from 4.13MHz to 66MHz and a main oscillator (OUT1) from 4.1kHz to 66MHz. The internal master oscillator operates between 33MHz and 66MHz, utilizing a 10-bit control DAC for frequency adjustment. Key specifications include a 5kHz resolution step size, 0.75% absolute accuracy, and nonvolatile EEPROM storage for frequency settings. The device supports a 2-wire serial interface for dynamic programming and operates on a single 3.0V to 3.6V supply.

Feature Summary

• Dual synchronous outputs: Reference (4.13MHz–66MHz) and Main (4.1kHz–66MHz)
• Internal master oscillator programmable from 33MHz to 66MHz
• Nonvolatile EEPROM storage for factory or user-programmed frequency settings
• 2-wire serial interface for in-circuit dynamic frequency modification

Applications

• Standalone oscillator applications requiring precise frequency generation
• Processor-controlled peripheral devices needing dynamically programmable clocks
• Systems requiring glitch-free output enable/disable via CTRL pins

Procurement Notes

Verify the ordering suffix '+W' indicates RoHS compliance and lead-free packaging as per standard Maxim Integrated conventions. Confirm the 'Z' suffix denotes the 150mil SOIC package. Ensure the specific 'DS1085LZ-5' variant matches the required 5kHz resolution step size for the application design.

Selection Notes

Select the DS1085LZ-5 variant specifically for applications requiring a 5kHz frequency resolution step size. Compare against DS1085LZ-12 (12.5kHz) and DS1085LZ-25 (25kHz) if coarser resolution is acceptable. Ensure the system voltage remains within the 3.0V to 3.6V range to maintain specified accuracy and performance characteristics.

Part Context

The DS1085L series belongs to the EconOscillator family of frequency synthesizers. This component integrates the master oscillator, prescalers, dividers, and control registers into a single chip, eliminating the need for external crystals or resonators typically required by traditional PLL synthesizers.

Replacement Considerations

Direct replacements include other variants within the DS1085L family (DS1085LZ-12, DS1085LZ-25) if frequency resolution differences are acceptable. Cross-referencing with older Dallas Semiconductor part numbers may be necessary for legacy designs.