SL23EP09ZC-1HT

Clock Generators, PLLs, Frequency Synthesizers Overview

The SL23EP09ZC-1HT is a low skew, low jitter Zero Delay Buffer (ZDB) manufactured by Silicon Laboratories Inc. It operates within a frequency range of 10 to 220 MHz and supports power supplies from 2.5 V to 3.3 V. The device features one input driving nine outputs organized as two banks of four plus one feedback output. Key electrical parameters include a typical cycle-to-cycle jitter of 50 ps and period jitter of 20 ps at 3.3 V. Maximum supply current is 26 mA at 66 MHz with a 3.3 V supply. It is available in 16-pin TSSOP packages.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero Delay Buffer architecture utilizing an on-chip PLL that locks to the reference clock for precise timing alignment.
• SpreadThru™ capability allowing direct pass-through of modulated Spread Spectrum Clock signals without degradation.
• Configurable select inputs enabling bypass mode operation or tri-stating of specific output banks to manage power consumption.

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the component revision level against the datasheet Rev 2.0 dated May 12, 2008. Confirm the package type matches the 16-pin TSSOP specification required for the -1HT suffix. Ensure the operating temperature grade aligns with commercial requirements (0°C to 70°C). Cross-reference the manufacturer identification with Silicon Laboratories Inc. documentation.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component for high-speed clock distribution requiring low jitter and skew. Evaluate the drive strength options based on load capacitance requirements; the High-Drive variant supports frequencies up to 220 MHz at 3.3 V. Consider the PLL bypass functionality if non-zero delay buffering is needed. Verify thermal resistance characteristics for the specific PCB airflow conditions.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the SL23EP09 series of Zero Delay Buffers. The 'Z' indicates the Commercial temperature grade (0°C to 70°C), while '1H' denotes the High-Drive option. The 'T' suffix specifies Tape and Reel packaging. The device is marked as Not Recommended for New Designs by the manufacturer.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.

Clock Generators, PLLs, Frequency Synthesizers FAQ

How does the device handle DC input signals?

If the input clock frequency is DC (GND to VDD), the internal circuitry detects this condition and forces all nine output clocks to a Hi-Z state. The PLL shuts down to save power, drawing less than 12 µA.

What is the function of the CLKOUT pin?

The CLKOUT pin serves as the buffered internal feedback output for the on-chip PLL. It allows the buffer to lock onto the input reference clock. Adjusting the load on this pin relative to other outputs can fine-tune the zero-delay characteristic.

How is the PLL bypass mode activated?

PLL bypass mode is activated when Select Input S2 is logic High (1) and Select Input S1 is logic Low (0). In this configuration, the PLL is shut down, and all outputs are driven directly from the reference input clock.