SY100S834ZI

Clock Generators, PLLs, Frequency Synthesizers Overview

The SY100S834ZI is a low skew clock generation chip from the Precision Edge series, manufactured by Micrel (now Microchip Technology). It provides synchronous divide-by-1, ÷2, and ÷4 outputs when the Function Select (FSEL) pin is high, or ÷2, ÷4, and ÷8 outputs when FSEL is low. The device supports differential or single-ended ECL/PECL inputs and operates within an industrial temperature range of -40°C to +85°C. Key electrical parameters include a maximum output-to-output skew of 50ps, a typical propagation delay of 1100ps, and a power supply current of approximately 49mA.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Configurable division ratios: (÷1, ÷2, ÷4) or (÷2, ÷4, ÷8) selectable via FSEL pin
• Low output-to-output skew of 50ps maximum
• Synchronous enable/disable and master reset for synchronization
• Supports differential/single-ended ECL and PECL input signals

Clock Generators, PLLs, Frequency Synthesizers Applications

• Low skew clock distribution networks
• High-speed digital systems requiring precise timing alignment
• Telecommunications equipment clocking

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify component authenticity through authorized channels as this part originates from Micrel, which was acquired by Microchip Technology. Confirm that the specific ordering suffix 'ZI' corresponds to the Industrial temperature range (-40°C to +85°C) and the Z16-2 package type. Ensure compatibility with existing system voltage levels and logic families before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the SY100S834ZI over the SY100S834L variant if operation at 5V power supplies is required, as the L version is optimized for 3.3V. Consider the FSEL pin configuration to determine if ÷1 or ÷8 outputs are needed for the specific frequency multiplication or division requirements of the design.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the SY100S834/L family of clock generators. It is designed explicitly for applications demanding minimal skew between multiple clock outputs derived from a single source. The device integrates internal dividers that are synchronous to each other, ensuring common output edges are precisely aligned.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

The SY100S834LZI serves as a lower-voltage alternative operating at 3.3V. For lead-free compliance in new designs, the SY100S834ZG variant offers NiPdAu finish instead of Sn-Pb, though functional specifications remain identical.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How does the FSEL pin affect the output frequencies?

When FSEL is LOW, the device generates ÷2, ÷4, and ÷8 outputs. When FSEL is HIGH, it generates ÷1, ÷2, and ÷4 outputs, effectively doubling the maximum output frequency capability.

What is the purpose of the VBB pin?

The VBB pin acts as a reference output. For single-ended input conditions, it should be connected to the CLK input and bypassed to ground via a 0.01µF capacitor to serve as the switching reference.

Is the enable function asynchronous?

No, the enable (EN) function is synchronous. Internal dividers are only enabled or disabled when the internal clock is in the LOW state to prevent runt pulses and maintain synchronization.