SL2309SC-1T

Clock Generators, PLLs, Frequency Synthesizers Overview

The SL2309SC-1T is a low skew, low jitter Zero Delay Buffer (ZDB) manufactured by Silicon Labs. It generates up to nine clock outputs from one reference input using an on-chip PLL that locks to the CLKIN signal via internal feedback from CLKOUT. The device operates within a 3.3V power supply range and supports frequencies from 10 MHz to 140 MHz with high-drive options. It features SpreadThru™ PLL for SSCG compatibility and selectable bypass modes. The component is housed in a 16-pin SOIC package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero Delay Buffer architecture utilizing an internal PLL for precise clock synchronization
• SpreadThru™ PLL capability allowing direct pass-through of modulated spread spectrum signals
• Configurable output banks controlled by S1 and S2 select pins for tri-state or bypass operations

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact package type and temperature grade. The datasheet indicates this product is not recommended for new designs; ensure compliance with current engineering standards before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the -1H variant for operation up to 140 MHz or the standard -1 version for frequencies up to 100 MHz. Ensure load capacitance requirements match the drive level specifications to maintain timing accuracy. Verify thermal resistance parameters if operating in environments with restricted airflow.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the SL23 series of clock buffers designed for high-speed distribution. It serves as a fanout buffer solution for systems requiring multiple synchronized clock sources derived from a single reference input.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Refer to the SL23EP09 for applications requiring extended frequency operation up to 220 MHz and a wider power supply range from 2.5V to 3.3V.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How does the device handle DC or floating input clocks?

An input frequency detection circuit forces all nine outputs to Hi-Z and shuts down the PLL to save power when the input is DC or floating.

What is the function of the CLKOUT pin?

The CLKOUT pin provides a buffered clock output used internally for PLL feedback to achieve zero delay between the input and other outputs.

How can the user adjust the delay between inputs and outputs?

Delay can be adjusted by changing the external loading capacitance at the CLKOUT pin relative to the Bank A and B clock loads.