DS1077LZ-50+

Overview

The DS1077LZ-50+ is a dual-output, programmable fixed-frequency oscillator from the EconOscillator family. 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 outputs adjustable via prescalers and dividers to frequencies between 4.87kHz and 66.666MHz. It includes nonvolatile EEPROM storage for frequency settings and a 2-wire serial interface for in-circuit programming. The component provides ±0.5% initial tolerance and ±1.25% variation over temperature and voltage.

Feature Summary

• Dual synchronous outputs (OUT0 and OUT1) with independent control
• 2-wire serial interface for on-the-fly frequency programming
• Nonvolatile EEPROM memory retains settings without power
• Single 2.7V to 3.6V supply operation with power-down mode

Applications

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

Procurement Notes

Verify the 'Z' suffix indicates the 150mil SO package and '+' denotes RoHS compliance. Confirm availability as this series may be discontinued or subject to limited stock. Ensure the specific 50MHz master frequency variant matches the design requirements.

Selection Notes

Select based on the required master frequency; the '-50' suffix specifies a 50MHz internal oscillator. Choose the 'Z' package for standard 150mil SO footprint. Consider current consumption reduction by disabling unused outputs or bypassing dividers if power efficiency is critical.

Part Context

This part belongs to the DS1077L EconOscillator/Divider line. Other variants include different master frequencies (40MHz, 60MHz, 66.666MHz) and packages (LU for 118mil µSOP). The device integrates prescalers and dividers to generate submultiples of the master clock.

Replacement Considerations

Direct replacements within the same family include DS1077LU-50+ (µSOP package) or other frequency variants like DS1077LZ-40+ or DS1077LZ-66+. Verify pin compatibility and electrical characteristics before substitution.

FAQ

How are output frequencies determined?

Output frequencies are derived from the internal master oscillator using programmable prescalers (P0, P1) and a divider (N), configured via the 2-wire serial interface.

What is the function of CTRL0 and CTRL1 pins?

CTRL0 and CTRL1 are multifunctional pins that can be configured as output enables or power-down controls for OUT0 and OUT1 respectively, depending on register settings.

Is the frequency setting volatile?

No, the frequency settings and control registers are stored in nonvolatile EEPROM, retaining values after power loss.