SL23EP04SI-1HT

Clock Generators, PLLs, Frequency Synthesizers Overview

The SL23EP04SI-1HT is a single-channel zero-delay buffer from the 23EP series, manufactured by Silicon Laboratories Inc. and distributed under Skyworks Solutions branding. It operates within a supply voltage range of 2.97 V to 3.63 V at 3.3V nominal, or 2.25 V to 2.75 V at 2.5V nominal. The device supports an operating frequency range up to 220 MHz with a 15pF load. Key electrical parameters include a typical power supply current of 12 mA at 66 MHz (3.3V) and 8 µA in power-down mode. It features low output clock skew of 60 ps typ and cycle-to-cycle jitter of 100 ps max at 66 MHz. The component is housed in an 8-pin SOIC package and is rated for industrial temperature grades (-40°C to +85°C).

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero-delay buffering capability using an on-chip PLL that locks to the reference input.
• SpreadThru™ feature allows modulation characteristics of spread spectrum clocks to pass through without degradation.
• High-drive option provides controlled impedance levels and extended frequency ranges compared to standard drive versions.
• Power-down mode automatically activates upon DC input detection, significantly reducing supply current.

Clock Generators, PLLs, Frequency Synthesizers Applications

• Printers, MFPs, and Digital Copiers
• PCs and Work Stations
• Routers, Switchers, and Servers
• Datacom and Telecom systems
• High-Speed Digital Embedded Systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the ordering suffix 'HT' corresponds to tape and reel shipping configuration rather than tube packaging. Confirm the 'I' designation indicates the Industrial temperature grade (-40°C to +85°C). Ensure the datasheet revision matches the specific manufacturing lot requirements, as this component is marked Not Recommended for New Designs.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the -1H variant specifically when operation above 167 MHz is required or when lower output impedance is necessary for EMI control. Verify that the load capacitance on the FBK pin matches the load on all other outputs to maintain zero delay specifications. Consider the 2.5V vs 3.3V supply requirements, as maximum operating frequencies decrease at lower voltages.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the SL23EP04 family of low-skew, low-jitter zero-delay buffers. The -1H suffix denotes the High-Drive version capable of higher frequencies (up to 220 MHz at 3.3V) compared to the standard -1 version. The SI-1HT designation specifies the Industrial temperature grade packaged in a tape and reel format for automated assembly.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The datasheet explicitly marks the SL23EP04 as 'Not Recommended for New Designs', suggesting direct replacement may require design review or alternative timing solutions from the manufacturer's current portfolio.