DS1077LU-40+T

Overview

The DS1077LU-40+T 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) generated via programmable prescalers and dividers. Output frequencies range from 4.87kHz to 66.666MHz with ±0.5% initial tolerance and ±1.25% variation over temperature and voltage. Frequency settings are stored in nonvolatile EEPROM memory.

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
• Power-down mode with smart output enable and power-down control pins

Applications

• Processor-controlled frequency synthesizers
• Stand-alone solid-state oscillators
• Clock generation for digital systems requiring minimal board area

Procurement Notes

Verify the specific suffix 'LU' corresponds to the 8-pin 118mil µSOP package as defined in the ordering information. Confirm that the '+T' designation indicates tape and reel packaging if required for automated assembly processes. Ensure compatibility with the 2-wire serial bus protocol specifications provided in the datasheet.

Selection Notes

Select this component when a dual-output clock solution with programmable frequencies is needed without external crystals or resonators. The DS1077LU-40 variant provides a 40MHz master clock base. Consider the ±1.25% total frequency variation over temperature and voltage when designing for precision timing applications. Verify that the 2-wire interface speed requirements align with standard or fast mode operations.

Part Context

The DS1077LU-40+T belongs to the DS1077L EconOscillator/Divider family. Other variants include DS1077LZ for SO packages and different master frequencies such as -50, -60, and -66. The 'LU' suffix specifically denotes the micro-small outline package (µSOP) form factor.

Replacement Considerations

Direct replacements within the same package and frequency range are limited due to specific master clock variations. Check for DS1077LU-50, DS1077LU-60, or DS1077LU-66 if frequency adjustments are permissible. Package differences between LU (µSOP) and LZ (SO) require layout modifications.