DS1077LU-40

Overview

The DS1077LU-40 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 trimmed to 40MHz, with outputs adjustable via prescalers (P0, P1) and a divider (N). Output frequencies range from 4.87kHz to 40MHz with ±0.5% initial tolerance and ±1.25% variation over temperature and voltage. Configuration is managed through a 2-wire serial interface, with settings stored in nonvolatile EEPROM.

Feature Summary

• Dual synchronous outputs (OUT0, OUT1) with independent frequency control
• 2-wire serial interface for on-the-fly programming and configuration
• Nonvolatile EEPROM storage for frequency and mode settings
• Single 2.7V to 3.6V supply operation with power-down capability

Applications

• Processor-controlled frequency synthesizers
• Stand-alone solid-state oscillators
• System clock generation requiring minimal board area

Procurement Notes

Verify the specific package variant, as the 'LU' suffix denotes the 8-pin 118mil µSOP package. Confirm the master frequency option corresponds to the '-40' designation (40MHz). Ensure compatibility with the required 2-wire serial bus protocol and voltage levels before integration.

Selection Notes

Select this component when a dual-output programmable oscillator with nonvolatile memory is required. The DS1077LU-40 provides a 40MHz master clock base. Consider the DS1077LU-50 or -60 if higher master frequencies are needed. Verify that the output frequency range (4.87kHz to 40MHz) meets system requirements.

Part Context

The DS1077LU-40 belongs to the DS1077L family of EconOscillators/Dividers. Other variants include DS1077LU-50 (50MHz), DS1077LU-60 (60MHz), and DS1077LU-66 (66.666MHz). The 'Z' suffix indicates an SO package, while 'U' indicates the µSOP package used in this part number.

Replacement Considerations

Direct replacements within the same family include DS1077LU-50 and DS1077LU-60, which share the same pinout and interface but offer different master frequencies. Ensure the new part's frequency range covers the original application's requirements.