DS1085LZ-25B2+

Overview

The DS1085LZ-25B2+ is a dual-output frequency synthesizer from Analog Devices/Maxim Integrated, featuring a 25kHz step size. It operates on a single 5V supply and generates frequencies ranging from 8.1kHz to 133MHz without external timing components. The device includes an internal master oscillator (66MHz–133MHz), programmable prescalers, and dividers. Frequency settings are stored in nonvolatile EEPROM memory. Configuration is managed via a 2-wire serial interface supporting standard and fast modes.

Feature Summary

• Dual synchronous outputs: Reference (OUT0) and Main (OUT1)
• User-programmable frequency range from 8.1kHz to 133MHz
• Nonvolatile EEPROM storage for factory or user-defined settings
• 2-Wire serial interface with configurable slave address

Applications

• Processor-controlled peripheral clock generation
• Standalone oscillator applications requiring fixed default frequencies
• Systems requiring dynamic frequency modification via serial bus

Procurement Notes

Verify the specific suffix 'B2' against official documentation, as standard listings typically show 'Z'. Confirm package type and temperature range specifications directly with the manufacturer or authorized distributors to ensure compatibility with design requirements.

Selection Notes

Select the DS1085LZ-25 variant for a 25kHz resolution step size. Ensure the application voltage matches the specified 5V ±5% requirement. Consider the 2-Wire interface constraints and available I/O pins on the host controller for serial communication implementation.

Part Context

This component belongs to the DS1085 EconOscillator family, which also includes variants with 10kHz and 50kHz step sizes. The 'LZ' designation indicates a 150mil SOIC package. The device integrates all necessary timing circuitry internally, eliminating the need for external crystals or resonators.

Replacement Considerations

Direct replacements within the same family include DS1085Z-10 and DS1085Z-50, differing only in frequency step resolution. Verify pinout and register compatibility when substituting between these variants.