843241BGLFT

Specialized ICS Overview

The ICS843241BG is a FemtoClock SAS/SATA clock generator designed for SAS-2 interconnect systems. It generates selectable output frequencies of 75MHz, 100MHz, 150MHz, or 300MHz using an external 25MHz parallel resonant crystal. The device provides one differential LVPECL output pair with typical RMS phase jitter of 0.70ps at 75MHz (900kHz–7.5MHz). It supports up, down, and center spread spectrum clocking and operates on a 3.3V or 2.5V supply within a 0°C to 70°C temperature range in a 16-TSSOP package.

Specialized ICS Feature Summary

• Designed for SAS-2 systems supporting SSP, STP, and SMP protocols
• Selectable output frequencies: 75MHz, 100MHz, 150MHz, 300MHz
• One differential 3.3V or 2.5V LVPECL output pair
• Up, down, and center spread spectrum clocking capabilities

Specialized ICS Applications

• SAS/SATA Host Bus Adapters
• SAS I/O Controllers
• TapeDrive and HDD Array Controllers
• SAS Edge and Fanout Expanders
• Disk Storage Enterprise

Specialized ICS Procurement Notes

Verify the specific ordering suffix 'BG' corresponds to the 16-TSSOP package and Tape & Reel carrier type as indicated in the datasheet's additional ordering information table. Confirm RoHS compliance status and lead-free designation for the specific batch. Check current availability status as this component may be subject to end-of-life notices or limited stock conditions.

Specialized ICS Selection Notes

Select based on required output frequency configuration via F_SEL pins and desired spread spectrum mode via SSC_SEL pins. Ensure power supply voltage matches either 3.3V or 2.5V requirements. Verify thermal management needs against the junction-to-ambient thermal resistance values provided for the 16-TSSOP package under expected airflow conditions.

Specialized ICS Part Context

This component belongs to the FemtoClock family of silicon timing products from Renesas Electronics (formerly IDT/ICS). It is specifically engineered for low jitter performance in Serial Attached SCSI environments. The BG suffix denotes the 16-Lead TSSOP package variant with tape and reel packaging, distinct from the SOIC package options available in the same series.

Specialized ICS Replacement Considerations

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