MC100EL39DWR2G

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC100EL39DWR2G is a low skew clock generation chip designed for ÷2/4 and ÷4/6 frequency division applications. It features synchronous internal dividers that ensure precise alignment of common output edges. The device supports differential or single-ended inputs, with an internally generated VBB pin available for AC coupling or as a switching reference. It includes synchronous enable/disable and master reset functions to prevent runt pulses and ensure synchronization across multiple devices. Operating in PECL mode (VCC = 4.2 V to 5.7 V) or NECL mode (VEE = −4.2 V to −5.7 V), it delivers up to 1.0 GHz maximum toggle frequency with 50 ps output-to-output skew.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Low skew design with 50 ps maximum output-to-output skew
• Synchronous enable/disable and master reset for synchronization
• Internal dividers are synchronous for aligned output edges
• Supports both PECL and NECL operating modes

Clock Generators, PLLs, Frequency Synthesizers Applications

• Low skew clock generation systems
• Frequency division circuits requiring precise edge alignment
• Multi-device synchronization applications using master reset

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify RoHS compliance and Pb-free status as indicated by the 'G' suffix. Confirm package type is SOIC-20 WB (Tape & Reel). Check for any specific application notes like AND8003/D for detailed usage guidelines. Ensure proper termination and power supply decoupling as per datasheet recommendations.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when low skew clock distribution is critical. Ensure input signals match PECL or NECL voltage levels. Consider the need for synchronous control via EN and MR pins. Verify thermal requirements and airflow conditions for optimal performance at high frequencies.

Clock Generators, PLLs, Frequency Synthesizers Part Context

Part of the 100EL series from onsemi, which includes temperature compensation. The MC100EL39 is specifically optimized for clock generation tasks where timing precision is paramount. It complements other ECL logic devices in high-speed digital systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacement: MC100LVEL39DWR2G (3.3V version). Ensure voltage levels and interface compatibility before substitution.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What is the maximum toggle frequency?

The maximum toggle frequency is 1.0 GHz.

How does the device handle single-ended inputs?

For single-ended inputs, the unused differential input should be connected to the VBB pin as a switching reference voltage.

Why is the Master Reset (MR) pin important?

The MR pin ensures synchronization between internal divider stages, especially in systems using multiple EL39 devices, preventing random startup states.