DS1077LU-50+

Overview

The DS1077LU-50+ 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 factory-trimmed to 50MHz, with two synchronous outputs (OUT0 and OUT1) adjustable via on-chip prescalers and dividers. Output frequencies range from 4.87kHz to 66.666MHz. Frequency settings are stored in nonvolatile EEPROM memory, allowing for processor-controlled or standalone operation. The component utilizes a 2-wire serial interface for configuration.

Feature Summary

• Dual low-jitter synchronous outputs with user-adjustable frequencies
• 2-wire serial interface for on-the-fly programming of prescalers and dividers
• Nonvolatile EEPROM storage for frequency settings and control registers
• Single 2.7V to 3.6V supply voltage with power-down mode

Applications

• Processor-controlled frequency synthesizers
• Standalone clock generation for digital systems
• System clock distribution requiring minimal board area

Procurement Notes

Verify the ordering suffix 'U' confirms the 8-pin 118mil µSOP package variant. Confirm the '+'' indicates lead-free compliance if required by specific assembly standards. Check current availability status as this component may be subject to discontinuation or limited stock depending on the manufacturer's lifecycle stage.

Selection Notes

Select the DS1077LU-50+ when a 50MHz master frequency base is required within the 2.7V to 3.6V operating range. Ensure the application can accommodate the 118mil µSOP package dimensions. Verify that the required output frequencies fall within the 4.87kHz to 66.666MHz range derived from the 50MHz master clock through the available prescaler and divider combinations.

Part Context

The DS1077LU-50+ belongs to the DS1077L EconOscillator/Divider family. The 'LU' designation specifically identifies the 8-pin 118mil µSOP package option, distinguishing it from the SOIC package variants. This family provides programmable clock solutions without external resonators or capacitors.

Replacement Considerations

Other models in the DS1077L family, such as DS1077LU-40+, DS1077LU-60+, or DS1077LU-66+, offer different master frequencies (40MHz, 60MHz, 66.666MHz) but share the same package and interface. Cross-model substitution requires verification that the new master frequency allows derivation of the desired output frequencies.