843441AM-100LF

Overview

The 843441AM-100LF is a FemtoClock® series clock generator IC designed for SAS, SAS-2, and SATA CPU applications. It features a single circuit with a 1:1 input-to-output ratio, producing an LVPECL output signal. The device operates at a maximum frequency of 100 MHz and requires a supply voltage between 3.135 V and 3.465 V. It utilizes a crystal input and incorporates a PLL for clock generation. The component is housed in an 8-SOIC package (0.154 inch width) and supports surface-mount installation.

Feature Summary

• FemtoClock® series clock generator optimized for SAS/SAS-2/SATA CPU interfaces
• Single circuit configuration with 1:1 ratio and LVPECL differential output
• Maximum operating frequency of 100 MHz with internal PLL
• Operates within a supply voltage range of 3.135 V to 3.465 V

Applications

• SAS (Serial Attached SCSI) systems
• SAS-2 compliant hardware
• SATA CPU clock generation
• High-speed data storage interface timing

Procurement Notes

This component is officially listed as End-of-Life (EOL) by the manufacturer. Verification of current availability should focus on distributor surplus or obsolete stock channels rather than standard new production orders. Buyers must confirm the specific revision status and any associated Product Change Notices (PCNs) regarding assembly site changes or labeling updates before procurement.

Selection Notes

Designers requiring this specific clock profile must account for the EOL status when planning long-term production. The 8-SOIC package limits pin count and thermal dissipation options compared to larger packages. Ensure that the system design can accommodate the 3.135 V–3.465 V supply requirement and LVPECL output swing characteristics without additional level shifting if interfacing with non-LVPECL loads.

Part Context

The 843441AM-100LF belongs to Renesas' FemtoClock® family, which specializes in low-jitter clock synthesis for high-speed digital interfaces. This specific part targets legacy SAS and SATA architectures where precise clocking is critical for data integrity. It serves as a dedicated timing solution for CPU-level synchronization in storage controllers.

Replacement Considerations

The 8T49N242-998NLGI is identified as a similar replacement option from Renesas Electronics Corporation.