MC100LVEL39DWR2

Clock Generators, PLLs, Frequency Synthesizers Overview

The MC100LVEL39DWR2 is a low skew clock generation chip designed for precise timing applications. It provides ÷2/4 and ÷4/6 division ratios with internal dividers synchronous to each other, ensuring aligned output edges. The device accepts differential or single-ended inputs and supports PECL (VCC = 3.0 V to 3.8 V) and NECL (VEE = −3.0 V to −3.8 V) modes. Key electrical parameters include a maximum toggle frequency of 1000 MHz, 50 ps maximum output-to-output skew, and propagation delays ranging from 600 ps to 1250 ps depending on the path. It features synchronous enable/disable and master reset capabilities.

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
• Supports both PECL and NECL operating voltage ranges
• Internal input pulldown resistors and ESD protection (> 2 kV HBM)

Clock Generators, PLLs, Frequency Synthesizers Applications

• Low skew clock generation systems
• High-speed digital signal processing timing
• Telecommunications equipment requiring precise clock alignment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify RoHS compliance and Pb-Free status as indicated by the 'G' suffix in ordering information. Confirm package type SOIC-20 WB and shipping quantity (1000/Tape & Reel). Check moisture sensitivity level (Level 3) requirements for storage and handling. Ensure power supply connections for all VCC and VEE pins are externally connected for proper operation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when precise phase alignment between multiple divided clocks is required. The synchronous divider design ensures common output edges are aligned. Consider the 1000 MHz maximum toggle frequency and 50 ps skew limits for high-speed applications. Verify compatibility with existing PECL or NECL logic families and ensure appropriate termination networks are used.

Clock Generators, PLLs, Frequency Synthesizers Part Context

Part of the MC100LVEL series, which contains temperature-compensated devices. The MC100LVEL39 specifically addresses clock generation needs with dual division ratios. It is manufactured by onsemi (formerly Motorola/NXP logic line). The device integrates 419 transistors and meets JEDEC latchup test specifications.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

MC100LVEL39DWR2G is the Pb-Free variant of the MC100LVEL39DWR2. No direct cross-manufacturer substitutes are listed in the provided documentation. Verify pinout and electrical characteristics if considering alternative low-skew clock generators.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How does the device handle single-ended inputs?

For single-ended input conditions, the unused differential input is connected to the VBB pin, which serves as a switching reference voltage. VBB can also rebias AC coupled inputs.

What is the purpose of the Master Reset (MR) input?

The Master Reset input ensures synchronization across systems utilizing multiple LVEL39 chips. Upon startup, internal flip-flops attain a random state; asserting MR aligns them. For single-device systems, MR is not strictly necessary due to internal divider synchronization.

Can the MC100LVEL39 operate with AC-coupled sinusoidal sources?

Yes, by using the VBB output, a sinusoidal source can be AC coupled into the device. The VBB pin provides an internally generated reference voltage suitable for this purpose.