PL138-98FC

Clock Buffers, Drivers Overview

The PL138-98FC is a low-skew, high-performance 1:9 differential LVPECL fanout buffer manufactured by Microchip Technology. It operates on a single supply voltage ranging from 2.5V to 3.3V and supports output frequencies up to 700 MHz. The device features two selectable differential input pairs capable of translating various standard input formats, including LVPECL, LVDS, CML, and SSTL, into nine differential LVPECL output pairs. Key electrical specifications include a typical propagation delay of 680 ps at 25°C, an output skew of 25 ps (typical), and additive phase jitter under 100 fs. It is housed in a 32-pin LQFP package with an industrial operating temperature range of -40°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Nine differential LVPECL output pairs with maximum frequency of 700 MHz
• Two selectable differential clock inputs accepting LVPECL, LVDS, CML, SSTL, and other formats
• Low output skew of 25 ps (typ.) and part-to-part skew of 140 ps (typ.)
• Additive phase jitter less than 100 fs (typ.)
• Single supply operation from 2.375V to 3.63V

Clock Buffers, Drivers Applications

• Clock distribution networks requiring low skew performance
• High-speed data acquisition systems
• Telecommunications infrastructure equipment
• Test and measurement instrumentation

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix 'FC' corresponds to the 32-pin LQFP package in commercial temperature grade (0°C to +70°C) as defined in the datasheet. Confirm moisture sensitivity level and reflow soldering profiles if handling surface-mount components. Ensure the design accounts for thermal relief pads on the PCB to manage junction temperatures under worst-case power dissipation conditions.

Clock Buffers, Drivers Selection Notes

Select this component when a 1:9 fanout ratio with differential LVPECL outputs is required. Ensure the input signal source matches one of the supported logic families or can be properly terminated to meet the common mode voltage range (VCMR). For designs requiring lower power consumption or fewer outputs, consider alternative members of the PL138 family. Verify that the PCB layout supports the necessary thermal management for the LQFP package.

Clock Buffers, Drivers Part Context

The PL138-98 is part of the PL138 family of differential LVPECL buffers designed for high-speed clock distribution. Originally developed by Micrel Inc., which was acquired by Microchip Technology, this series offers low-cost solutions for translating various input signals to LVPECL. The PL138-98 specifically provides nine outputs, distinguishing it from other variants like the PL138-48 which offers four outputs.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip's official cross-reference tools or contact sales for equivalent devices within the current portfolio.