SY89645LK4G

Clock Buffers, Drivers Overview

The SY89645LK4G is a precision low skew, 1-to-4 LVDS fanout buffer manufactured by Microchip Technology (Micrel). It accepts LVTTL or LVCMOS inputs and translates them to four identical differential LVDS outputs. The device operates from a 3.3V ±5% power supply and supports clock signals up to 650MHz. Key electrical parameters include an output skew of less than 40ps, propagation delay under 3ns, and rise/fall times below 400ps. It functions within the industrial temperature range of –40°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Translates single-ended LVCMOS/LVTTL inputs to four differential LVDS outputs
• Maximum operating frequency of 650MHz with <40ps output-to-output skew
• Synchronous Clock Enable (CLK_EN) function with internal pull-up resistor
• Operates on a 3.3V ±5% supply in the industrial temperature range

Clock Buffers, Drivers Applications

• Clock and data distribution systems
• High-performance computing architectures
• Telecommunications equipment
• Datacom networking infrastructure

Clock Buffers, Drivers Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance and Pb-Free status with NiPdAu lead finish. Ensure storage conditions account for humidity sensitivity if applicable. Validate that the K4 package marking matches the ordered part number before integration into production lines.

Clock Buffers, Drivers Selection Notes

Select this component when converting single-ended logic levels to differential LVDS signals with minimal skew. Ensure the input signal swing meets the minimum requirement of 1.2V. Verify that the load impedance across output pairs is terminated at 100Ω to maintain signal integrity and meet AC electrical specifications.

Clock Buffers, Drivers Part Context

This part belongs to Micrel’s Precision Edge product line, designed for high-speed timing applications. The 'K4' suffix indicates the 20-pin TSSOP package type. The 'G' suffix denotes Pb-free construction. It serves as a fanout buffer specifically optimized for low jitter and precise edge alignment in digital clock networks.

Clock Buffers, Drivers Replacement Considerations

Check datasheets for alternative 1:4 LVDS fanout buffers from other manufacturers. Ensure pin compatibility and voltage level translation requirements match. Verify that replacement parts support the same maximum frequency of 650MHz and operate within the required -40°C to +85°C temperature range.