MC100LVEL34D

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC100LVEL34 is a low skew clock generation chip designed for applications requiring precise alignment of common output edges. It features internal synchronous dividers providing divide-by-2, divide-by-4, and divide-by-8 outputs from a single differential input. The device supports PECL mode (VCC = 3.0 V to 3.8 V) and NECL mode (VEE = -3.0 V to -3.8 V). Key electrical parameters include a maximum toggle frequency of 1.5 GHz, typical output-to-output skew of 50 ps, and cycle-to-cycle jitter less than 1 ps. Power supply current ranges from 40 mA to 62 mA depending on the operating mode and temperature.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Synchronous Enable/Disable control prevents runt clock pulses during state changes
• Master Reset (MR) input allows synchronization of internal dividers and multiple devices
• Internal VBB pin provides a reference voltage for single-ended inputs or AC coupling rebiasing
• LVDS input compatible with open input default state functionality

Clock Generators, PLLs, Frequency Synthesizers Applications

• Low skew clock generation systems
• High-speed digital circuit timing distribution
• Systems requiring synchronized divider stages

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component status before design implementation as the SOIC-16 variant (MC100LVEL34DR2G) is listed as discontinued in the provided documentation. Confirm package availability (SOIC-16 vs TSSOP-16) matches the specific ordering suffix required for the target application.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select based on required power supply configuration; use PECL mode for positive supply operation or NECL mode for negative supply operation. Ensure input swing meets the minimum 150 mV requirement for guaranteed AC parameters. Verify thermal resistance limits if operating at high frequencies near the 1.5 GHz maximum toggle rate.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the 100LVEL series, which includes temperature compensation. It is part of the ECLinPS family of logic devices manufactured by onsemi. The device utilizes 210 transistors and offers ESD protection exceeding 2 kV via the Human Body Model.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The datasheet does not list direct replacement part numbers. Designers should consult onsemi representatives for alternatives due to the discontinued status of the SOIC-16 tape and reel variant.

Clock Generators, PLLs, Frequency Synthesizers FAQ

["What is the function of the VBB pin?","The VBB pin provides an internally generated voltage reference. For single-ended inputs, unused differential inputs connect to VBB. It can also rebias AC coupled inputs when decoupled with a 0.01 µF capacitor."]

["How does the synchronous enable feature work?","The EN signal freezes internal divider flip-flops on the first falling edge of the clock after assertion. This ensures dividers only enable/disable when the internal clock is LOW, preventing runt pulses that could cause synchronization loss."]

["What are the operating voltage ranges?","In PECL mode, VCC ranges from 3.0 V to 3.8 V with VEE at 0 V. In NECL mode, VCC is 0 V and VEE ranges from -3.0 V to -3.8 V."]