DS4776D+

Programmable Timers And Oscillators Overview

The DS4776D+ is a ceramic surface-mount crystal oscillator from the Maxim DS4-XO series, manufactured by Analog Devices Inc./Maxim Integrated. It generates a nominal output frequency of 77.76MHz using a fundamental-mode AT-cut crystal and PLL synthesizer technology. The device features LVDS differential outputs with an active-high OE pin. Electrical characteristics include a supply voltage range of 3.135V to 3.465V, typical operating current of 52mA for LVDS, and integrated phase jitter of less than 0.7ps RMS (12kHz to 20MHz). Frequency stability is ±50ppm over temperature, aging, load, and supply variations. It operates within a -40°C to +85°C temperature range in a 10-pin LCCC package measuring 5.0mm x 3.2mm x 1.49mm.

Programmable Timers And Oscillators Feature Summary

• Low Phase Jitter: Typical integrated phase jitter < 0.7ps RMS from 12kHz to 20MHz.
• LVDS Output Driver: Provides differential LVDS signals with a 100Ω differential load specification.
• Compact Package: Available in a 10-pin LCCC ceramic package (5.0mm x 3.2mm x 1.49mm) suitable for space-constrained PCBs.
• Wide Frequency Stability: Maintains ±50ppm total frequency stability across temperature, aging, load, and supply variations.

Programmable Timers And Oscillators Applications

• InfiniBand
• BPON/GPON
• Ethernet
• 10GbE
• SONET/SDH

Programmable Timers And Oscillators Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead finish specifications (JESD97 category e4) prior to procurement. Check for potential obsolescence notices as this component belongs to a discontinued product family. Ensure ordering suffixes match required output types and frequencies.

Programmable Timers And Oscillators Selection Notes

Select the DS4776D+ variant specifically for LVDS output requirements; choose the DS4776P+ model if LVPECL outputs are needed instead. Verify that the 77.76MHz frequency aligns with system clocking needs. Ensure the design accommodates the 3.3V ±5% supply voltage range and provides adequate thermal management for the exposed paddle ground connection.

Programmable Timers And Oscillators Part Context

The DS4776D+ is part of the broader DS4-XO series of crystal oscillators, which includes models like DS4125, DS4160, and DS4250. These devices share common packaging and electrical characteristics but differ in nominal output frequencies ranging from 77.76MHz to 622.08MHz. The 'D+' suffix indicates the LVDS output type and lead-free/RoHS-compliant construction.

Programmable Timers And Oscillators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official replacement notices or contact the manufacturer directly for end-of-life transition guidance.