DS1077LZ-66+

Overview

The DS1077LZ-66+ is a dual-output, programmable fixed-frequency oscillator from Analog Devices/Maxim Integrated. 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. Configuration is managed through a 2-wire serial interface supporting standard and fast modes.

Feature Summary

• Dual low-jitter synchronous outputs with user-adjustable frequencies
• Nonvolatile frequency settings stored in EEPROM for power-up defaults
• 2-wire serial interface for on-the-fly programming of prescalers and dividers
• 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 for microcontrollers and digital logic
• Replacing crystals and ceramic resonators in space-constrained designs

Procurement Notes

Verify the ordering suffix Z indicates the 8-pin 150mil SO package. Confirm the -66 designation corresponds to the 66.666MHz master frequency option. Check current availability status as this component may be subject to limited supply or end-of-life notices. Ensure the + suffix denotes lead-free compliance if required by assembly specifications.

Selection Notes

Select the DS1077LZ-66+ when a 66.666MHz master frequency is required with dual output capabilities. Choose the Z package for 150mil SO footprint compatibility. Consider the ±1.25% total frequency variation over temperature and voltage for timing accuracy requirements. Verify that the 2-wire interface speed (up to 400kHz) matches the system controller's capabilities.

Part Context

The DS1077L series includes variants with different master frequencies: 40MHz, 50MHz, 60MHz, and 66.666MHz. The LZ suffix specifically identifies the 150mil SO package, while LU denotes the 118mil µSOP package. This family serves as a drop-in replacement for traditional crystal oscillators where programmability and reduced board space are priorities.

Replacement Considerations

Direct pin-compatible replacements within the same package include other DS1077Lx-XXX variants with different master frequencies (e.g., DS1077LZ-60+, DS1077LZ-50+). For fixed-frequency applications, preprogrammed versions can be ordered. No cross-family substitutes are confirmed without specific electrical parameter matching.