SL23EP09ZI-1T

Clock Generators, PLLs, Frequency Synthesizers Overview

The SL23EP09ZI-1T is a low skew, low jitter Zero Delay Buffer (ZDB) manufactured by Silicon Laboratories Inc. It generates up to nine clock outputs from one reference input for high-speed distribution. The device operates within a frequency range of 10 to 220 MHz and supports power supplies between 2.5 V and 3.3 V. It features an on-chip PLL that locks to the CLKIN input via internal feedback from CLKOUT. The component is available in standard and high-drive options, packaged in a 16-pin TSSOP or SOIC format. This specific part number indicates the industrial temperature grade (-40°C to +85°C) with tape and reel shipping.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero Delay Buffer architecture utilizing an internal PLL for precise clock synchronization
• SpreadThru™ capability allowing direct pass-through of modulated Spread Spectrum Clock signals
• Configurable select inputs enabling bypass mode, tri-state control, and bank-specific output management

Clock Generators, PLLs, Frequency Synthesizers Applications

• Printers, MFPs and Digital Copiers
• PCs and Work Stations
• Routers, Switchers and Servers
• Digital Embedded Systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the manufacturer designation carefully, as this component was originally produced by Silicon Laboratories Inc. before Skyworks Solutions acquired their timing business. Confirm the ordering suffix matches the required package type and shipping method. Ensure compliance with RoHS standards and check for any End-of-Life notices or product change notifications regarding the single die construction.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the -1H variant if higher drive strength is required for frequencies up to 220 MHz at 3.3V. Choose the -1 variant for standard drive applications. Verify load capacitance requirements against the specified maximums to maintain jitter and skew specifications. Ensure the operating temperature range aligns with the ZI (Industrial) or ZC (Commercial) suffix selection.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the SL23EP09 family of low-power, low-jitter zero delay buffers. It is designed for systems requiring multiple synchronized clock outputs from a single reference source. The device integrates a voltage regulator for stable PLL performance across wide supply variations.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

SL23EP09ZI-1H

Clock Generators, PLLs, Frequency Synthesizers FAQ

How does the device handle Spread Spectrum Clocking?

The SL23EP09 features SpreadThru™ technology, which allows it to pass modulated Spread Spectrum Clock signals from the reference input to the output clocks without degrading the spread percentage, profile, or modulation frequency.

What is the function of the S1 and S2 pins?

S1 and S2 are select input pins used to control the state of the output clock banks (A and B), select the output source (PLL or bypass), and manage PLL shutdown status.

How is zero delay achieved between input and outputs?

Zero delay is achieved by ensuring all outputs and the CLKIN pin are loaded with identical capacitance. Since CLKOUT provides internal feedback to the PLL, matching its load to Bank A and B clocks minimizes input-to-output delay.