23S09E-1DCGI

Overview

The Renesas Electronics 23S09E-1DCGI is a 3.3V zero delay clock buffer featuring an on-chip phase-locked loop (PLL). It accepts one reference input and distributes the clock to nine outputs organized into two banks of four, plus a CLKOUT feedback pin. The device operates within a frequency range of 10MHz to 200MHz with a supply voltage between 3V and 3.6V. It provides output skew less than 250ps and cycle-to-cycle jitter under 200ps. The component is housed in a 16-pin SOIC package and supports commercial temperature operation from 0°C to +70°C.

Feature Summary

• Zero delay PLL clock distribution aligning input and output phases
• Operates at frequencies up to 200MHz with spread spectrum compatibility
• Low output skew (<250ps) and low jitter (<200ps cycle-to-cycle)
• Separate output enable controls for each output bank

Applications

• SDRAM clock distribution
• Telecom systems
• Datacom applications
• PC motherboards and workstations
• Critical path delay designs

Procurement Notes

Verify the manufacturing source, as the part was originally produced by Integrated Device Technology (IDT) before acquisition by Renesas. Confirm RoHS compliance status and check for End-of-Life notices regarding non-green parts. Ensure the specific suffix matches the required temperature range and packaging format.

Selection Notes

Select this model for high-speed clock distribution requiring zero I/O delay. The -1H variant offers higher drive strength compared to the standard -1 version. Ensure load capacitance requirements are met: 30pF for frequencies below 100MHz and 10pF for frequencies between 100MHz and 200MHz. Verify that all outputs, including CLKOUT, have equal loading for optimal skew performance.

Part Context

This component belongs to the IDT23S09E series, which serves as a 16-pin expansion of the IDT23S05E family. It is designed for high-speed clock buffering applications where precise timing alignment is critical. The device integrates the PLL feedback mechanism internally via the CLKOUT pad, eliminating the need for external RC networks.

Replacement Considerations

Public confirmed substitute part numbers only; omit otherwise.

FAQ

How does the device handle power consumption when no input clock is present?

In the absence of an input clock, the device enters a power-down mode where outputs are tri-stated. Current draw is less than 12µA for the commercial temperature range.

What is the function of the CLKOUT pin?

The CLKOUT pin provides the internal PLL feedback signal. For zero I/O delay, this pin must be loaded equally with all other outputs.

Can this buffer pass through Spread Spectrum signals?

Yes, the device is designed to be spread spectrum compatible and will not filter off the spread spectrum feature of the reference input if present.