DS1077Z-66+

Overview

The DS1077Z-66+ is a dual-output, programmable, fixed-frequency oscillator requiring no external components. It operates on a single 5V supply (4.75V to 5.25V) and features two synchronous outputs with low jitter. The master frequency is 66.666MHz, with output frequencies adjustable in submultiples via on-chip prescalers and a divider. Frequency settings are stored in nonvolatile EEPROM memory, allowing the device to default to programmed values upon power-up. It includes a 2-wire serial interface for in-circuit programming of prescalers and dividers.

Feature Summary

• Dual low-jitter, synchronous fixed frequency outputs
• 2-wire serial interface for on-the-fly programming
• Nonvolatile (EEPROM) storage for frequency settings
• No external components required for operation

Applications

• Processor-controlled frequency synthesizers
• Standalone oscillators
• Portable equipment clocking

Procurement Notes

Verify the component status as discontinued or end-of-life through official manufacturer channels. Confirm the specific package variant (8-pin SO) matches the design requirements. Ensure compatibility with the 2-wire serial interface protocol if used in a processor-controlled system.

Selection Notes

Select this model when a fixed 66.666MHz master frequency is required. The Z suffix indicates an 8-pin SO package. Consider the DS1077U variant if a smaller 118mil µSOP package is needed. Verify that the required output frequencies fall within the 8.1kHz to 66.666MHz range derived from the master clock.

Part Context

The DS1077 series belongs to the EconOscillator family by Maxim Integrated (now Analog Devices). These devices integrate an internal oscillator, prescalers, and dividers into a single chip. The DS1077Z-66+ specifically provides a 66.666MHz master clock, distinguishing it from other variants like the DS1077Z-100 (100MHz) or DS1077Z-133 (133MHz).

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Check for direct pin-compatible alternatives from the same product family, such as the DS1077U-66+, which offers the same electrical characteristics in a different package.