DS1077LU-66

Overview

The DS1077LU-66 is a dual-output, programmable fixed-frequency oscillator from the DS1077L series. It operates on a single 2.7V to 3.6V supply and requires no external components. The device features an internal master oscillator with two synchronous outputs (OUT0 and OUT1) that can be adjusted via on-chip prescalers and dividers. Frequency settings are stored in nonvolatile EEPROM memory. It supports a 2-wire serial interface for in-circuit programming and includes power-down mode capabilities.

Feature Summary

• Dual low-jitter synchronous outputs with frequencies ranging from 4.87kHz to 66.666MHz
• Nonvolatile EEPROM storage for frequency settings and control registers
• 2-wire serial interface for on-the-fly frequency changes
• Single 2.7V to 3.6V supply operation with power-down mode

Applications

• Processor-controlled frequency synthesizers
• Stand-alone clock generators
• Portable equipment requiring minimal board area
• Systems needing synchronized multi-frequency clocks

Procurement Notes

Verify package type 'U' corresponds to the 8-pin 118mil µSOP format. Confirm the suffix '-66' indicates the 66.666MHz master frequency option. Check RoHS compliance status as manufacturing sources may vary. Ensure the specific revision matches design requirements.

Selection Notes

Select this model when a 66.666MHz master frequency is required. Choose the LU suffix for surface-mount µSOP packaging. Consider the ±1.25% frequency variation over temperature and voltage. Verify if the 2-wire interface compatibility meets system controller specifications.

Part Context

The DS1077L series includes variants with different master frequencies: -40 (40MHz), -50 (50MHz), -60 (60MHz), and -66 (66.666MHz). The LU package variant uses an 8-pin 118mil µSOP form factor, distinct from the Z package which uses an 8-pin 150mil SOIC.

Replacement Considerations

Direct replacements within the same family include DS1077LU-40, DS1077LU-50, and DS1077LU-60, differing only in master frequency. Cross-package equivalents exist as DS1077LZ-66.