PL123-05NSC

Clock Buffers, Drivers Overview

The PL123-05NSC is a low-skew fanout buffer manufactured by Micrel (now Microchip Technology), designed for distributing high-speed clock signals. It accepts an input frequency ranging from DC to 134MHz and provides five buffered outputs with identical frequency characteristics. The device operates within a supply voltage range of 1.62V to 3.63V, supporting full performance at 2.5V to 3.3V and up to 67MHz at 1.8V. Key electrical specifications include a maximum propagation delay of 9.2ns and output-to-output skew of less than 250ps. It features low additive phase jitter of 60fs RMS and is housed in an 8-pin SOP package suitable for commercial temperature ranges.

Clock Buffers, Drivers Feature Summary

• Provides 1:5 output fanout for clock distribution from DC to 134MHz
• Low output-to-output skew of less than 250ps and low additive phase jitter of 60fs RMS
• Operates on 2.5V to 3.3V supplies; supports 1.8V operation up to 67MHz
• Available in 8-Pin SOP package compliant with Green/RoHS standards

Clock Buffers, Drivers Applications

• Fanoutting low noise CMOS clock oscillators to multiple destinations
• Driving SDRAM modules in PC systems (typically using other variants for higher channel counts)
• Distributing reference clocks in portable applications requiring low power consumption

Clock Buffers, Drivers Procurement Notes

Verify the manufacturer origin as this component was originally produced by Micrel Inc., which has been acquired by Microchip Technology. Confirm that the 'SC' suffix denotes the Commercial temperature range (0°C to 70°C) and the tube packaging format. Ensure compatibility with the required supply voltage levels, as the device is not intended for 5V input-tolerant applications.

Clock Buffers, Drivers Selection Notes

Select the PL123-05NSC when a 1:5 fanout ratio is required for frequencies up to 134MHz. For industrial temperature applications (-40°C to 85°C), consider the PL123-05NSI variant instead. If more than five outputs are needed, such as for driving multiple DIMMs directly, the PL123-09N series should be evaluated. Ensure PCB layout adheres to the recommended trace lengths and termination strategies to maintain signal integrity.

Clock Buffers, Drivers Part Context

The PL123-05N is part of the PL123 family of low-cost fanout buffers. This family includes the PL123-09N, which offers a 1:9 output fanout in a 16-pin SOP package. Both variants share similar electrical characteristics regarding skew, jitter, and operating voltage ranges, differing primarily in the number of outputs and physical package size.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers for this specific component were not found in the provided source material.