PL138-18FC-R

Clock Buffers, Drivers Overview

The PL138-18FC-R is a low-skew 1:10 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 ten differential LVPECL output pairs and two selectable differential input pairs, translating various standard input formats including LVDS, CML, and LVCMOS. Key electrical specifications include a typical propagation delay of 680 ps at 25°C, an output skew of 25 ps, and additive jitter below 100 fs. It is housed in a 32-pin LQFP package with an operating temperature range of -40°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Ten differential LVPECL output pairs with low skew (25 ps typ.)
• Supports output frequencies up to 700 MHz
• Accepts multiple input formats via selectable differential inputs
• Additive phase jitter less than 100 fs

Clock Buffers, Drivers Applications

• High-speed clock distribution networks
• Low-jitter signal buffering for data converters
• Telecommunications infrastructure timing systems

Clock Buffers, Drivers Procurement Notes

Verify the component origin as Micrel Inc., now part of Microchip Technology. Confirm the suffix 'R' indicates tape and reel packaging and 'FC' denotes the 32-pin LQFP package. Ensure the specific grade matches the industrial temperature range (-40°C to +85°C) required for the application environment.

Clock Buffers, Drivers Selection Notes

Select this component when a high-channel-count differential buffer is required for LVPECL signals. Ensure the PCB layout accommodates thermal relief pads due to significant power dissipation (up to 639 mW worst-case). Verify that the input signal source meets the common mode voltage requirements for the chosen logic family.

Clock Buffers, Drivers Part Context

This device belongs to the PL138 family of high-performance fanout buffers. While originally designed by Micrel, it is distributed under the Microchip Technology brand. The PL138-18 variant specifically provides a 1:10 split ratio, distinguishing it from other configurations within the same product line.

Clock Buffers, Drivers Replacement Considerations

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