PL123-09NOC-R

Clock Buffers, Drivers Overview

The PL123-09NOC-R is a low skew fanout buffer manufactured by Micrel Inc., designed for distributing high-speed clocks with low output-to-output skew and preserving low noise properties. It accepts an input frequency from DC to 134MHz and provides nine buffered outputs of the same frequency. The device operates within a supply voltage range of 1.62V to 3.63V, supporting 2.5V to 3.3V operation at full speed and 1.8V operation up to 67MHz. It features low additive phase jitter of 60fs RMS and output-to-output skew less than 250ps. The component is housed in a 16-pin SOP package and supports commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature ranges.

Clock Buffers, Drivers Feature Summary

• Provides 1:9 output fanout for clock distribution from DC to 134MHz
• Low additive phase jitter of 60fs RMS and output-to-output skew under 250ps
• Operates on 2.5V to 3.3V supplies; supports 1.8V operation up to 67MHz
• Available in 16-pin SOP packages compliant with GREEN/RoHS standards

Clock Buffers, Drivers Applications

• Driving SDRAM in PC systems, such as powering two DIMMs or four SO-DIMMs
• Fanoutting low noise CMOS clock oscillators to multiple low noise CMOS clocks
• Providing external feedback to a PLL in clock distribution networks

Clock Buffers, Drivers Procurement Notes

Verify that the ordering suffix 'R' corresponds to the Tape & Reel packaging option as specified in the manufacturer's ordering information. Confirm the operating temperature range matches the required application environment, distinguishing between Commercial (C) and Industrial (I) variants. Ensure the design accounts for the specific load capacitance limits defined for frequencies above and below 100MHz to maintain signal integrity.

Clock Buffers, Drivers Selection Notes

Select this component when a 1:9 fanout ratio is required for clock signals up to 134MHz. Consider the PL123-05N variant if only five outputs are needed. Evaluate the power supply constraints, as the device supports lower voltage operation down to 1.62V but with reduced maximum frequency capabilities at 1.8V. Ensure PCB layout guidelines regarding trace length and termination are followed to minimize ringing and reflections.

Clock Buffers, Drivers Part Context

The PL123-09NOC-R belongs to the PL123 series of low-cost fanout buffers originally developed by Micrel Inc. This series includes the PL123-05N for 1:5 fanout applications. The devices are designed to distribute high-speed clocks while maintaining low noise characteristics and minimal skew between outputs, making them suitable for memory and logic clock distribution in digital systems.

Clock Buffers, Drivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.