NB3L8543SDTR2G

Clock Buffers, Drivers Overview

The NB3L8543SDTR2G is a high-performance, low-skew differential 2:1 multiplexer to 4 LVDS clock fanout buffer manufactured by onsemi. It features two selectable differential clock inputs (CLK/CLK and PCLK/PCLK) that support multiple logic families including LVPECL, LVDS, CML, HCSL, SSTL, and HSTL. The device provides four differential LVDS output pairs with a maximum operating frequency of 650 MHz at 3.3 V or 500 MHz at 2.5 V. Key electrical specifications include a typical additive phase jitter of 50 fs RMS, a maximum output skew of 40 ps, and a propagation delay of 1.9 ns. It operates within an ambient temperature range of -40°C to +85°C and is housed in a TSSOP-20 package.

Clock Buffers, Drivers Feature Summary

• Multiplexed input architecture supporting two selectable differential clock sources with broad compatibility for LVPECL, LVDS, CML, HCSL, SSTL, and HSTL standards.
• Four differential LVDS output pairs delivering up to 650 MHz operation with low skew characteristics (40 ps max output-to-output skew).
• Synchronous clock enable (CLK_EN) mechanism prevents runt clock pulses during asynchronous assertion or deassertion.
• Low power consumption with a maximum supply current of 50 mA and wide voltage tolerance for 2.5 V ±5% or 3.3 V ±10% operation.

Clock Buffers, Drivers Applications

• High-speed system clock distribution networks requiring low jitter and precise timing alignment.
• Peripheral clock generation and buffering in server and storage infrastructure platforms.
• Telecommunications equipment utilizing multi-standard clock interfaces.
• Industrial control systems demanding reliable clock synchronization across multiple components.

Clock Buffers, Drivers Procurement Notes

Verify the ordering suffix 'R2G' corresponds to the Tape & Reel shipping configuration containing 2500 units per reel. Confirm the component is Pb-Free as indicated by the '/C0071' marking. Ensure the application design accounts for the specific thermal resistance values (140 °C/W junction-to-ambient at 0 lfpm) when calculating heat dissipation in enclosed environments.

Clock Buffers, Drivers Selection Notes

Select this component when a single-ended or differential input must be routed to four LVDS loads with minimal skew. Choose between the CLK and PCLK inputs based on the source signal standard; PCLK supports CML while CLK does not. Ensure the power supply voltage matches the required maximum frequency, as the 650 MHz limit applies only at 3.3 V, whereas 2.5 V operation limits the frequency to 500 MHz.

Clock Buffers, Drivers Part Context

This part belongs to the NB3L8543 family, which includes variants such as the NB3L8543E/D and NB3L8543S. The SDTR2G designation specifically identifies the surface-mount TSSOP-20 package version supplied in tape and reel format for automated assembly processes. It serves as a clock management solution within onsemi's portfolio of high-speed logic devices.

Clock Buffers, Drivers Replacement Considerations

Direct functional substitutes within the same family include the NB3L8543SDTG, which shares identical electrical specifications but is shipped in rails rather than tape and reel. Cross-family replacements require verification of pin compatibility and electrical parameters against the original design requirements.