PL138-48OC

Clock Buffers, Drivers Overview

The PL138-48OC is a low-skew, 1:4 differential LVPECL fanout buffer manufactured by Microchip Technology. It operates on a single supply voltage ranging from 2.375V to 3.63V and supports output frequencies up to 800 MHz. The device features four differential LVPECL output pairs and two selectable differential input pairs capable of translating various standard input formats including LVPECL, LVCMOS, LVDS, HCSL, SSTL, LVHSTL, and CML. Key electrical specifications include a typical propagation delay of 790 ps at +85°C, an output skew of 25 ps (typical), and additive jitter under 100 fs. It is housed in a 20-pin TSSOP package with a commercial operating temperature range of 0°C to +70°C.

Clock Buffers, Drivers Feature Summary

• Four differential LVPECL output pairs with low skew characteristics
• Supports multiple input formats via resistor bias networks
• Additive phase jitter less than 100 fs maximum
• Operates within a 2.375V to 3.63V supply voltage range

Clock Buffers, Drivers Applications

• Clock distribution in high-speed digital systems
• Fanout buffering for LVPECL clock signals
• Signal translation from single-ended or differential sources to LVPECL

Clock Buffers, Drivers Procurement Notes

Verify the ordering suffix 'OC' corresponds to the 20-pin TSSOP package and the commercial temperature range (0°C to +70°C). Confirm that the specific revision level matches the required datasheet version DS20005543B. Ensure compatibility with the intended PCB land pattern for the TSSOP-20 footprint during procurement planning.

Clock Buffers, Drivers Selection Notes

Select this component when a low-jitter, low-skew 1:4 fanout buffer is required for LVPECL applications. Ensure the input signal format matches one of the supported types (LVPECL, LVCMOS, LVDS, etc.) and that appropriate termination resistors are included in the design. Verify that the ambient temperature does not exceed the commercial grade limit of +70°C without derating considerations.

Clock Buffers, Drivers Part Context

The PL138-48OC belongs to the PL138-48 family of differential LVPECL buffers. This family includes variants with different packages (QFN, TSSOP) and temperature ranges (Commercial, Industrial). The 'O' suffix denotes the 20-pin TSSOP package, while 'C' indicates the commercial temperature range. Other variants like PL138-48OI-R offer industrial temperature ratings and tape-and-reel packaging.

Clock Buffers, Drivers Replacement Considerations

Direct replacements within the same family include PL138-48QI (16-pin QFN, Industrial) and PL138-48OI-R (20-pin TSSOP, Industrial, Tape & Reel). When substituting, verify that the temperature range and packaging format meet the system requirements. Pinouts remain consistent across the PL138-48 family for functional interchangeability.