LSI LSISAS3X40LC1

Mfr. Part

LSISAS3X40LC1

Manufacturer

LSI. Y-IC is a quality distributor of LSI. We deliver the best products and services and support your project end to end

Detailed Description

High-port-density SAS-3 12 Gb/s expander IC from the Integrated Circuits category under Specialized ICs. Designed to fan out SAS links in storage backplanes and enclosures, connecting many SAS and SATA drives to host adapters. Supports management and routing of storage traffic with enterprise reliability. Model suffix LC1 denotes a specific configuration variant. Quantity available 2037. Date code 13+. Package or case code 869

Key Features

SAS-3 link rate up to 12 Gb/s per PHY, backward compatible with 6 Gb/s and 3 Gb/s

Up to 40 PHYs for high-density expansion

SATA Tunneling Protocol support for SAS-to-SATA drive connectivity

Zoning and routing features to manage paths efficiently

Wide-port aggregation to scale bandwidth

Advanced error handling and link diagnostics

SMP management for expander control and monitoring

Hooks for enclosure management such as I2C and SMBus support

Low-latency switching optimized for storage workloads

Broad interoperability with major HBAs and RAID controllers

Key Advantages

Enables large SAS storage topologies with one high-port-count chip

Reduces board space and BOM versus multiple smaller expanders

Backward compatibility protects existing drive investments

Proven LSI ecosystem lowers integration risk

Strong management and reliability features for enterprise uptime

Mature silicon with wide adoption and robust firmware support

Packaging

Package type likely high-pin-count BGA optimized for backplanes and controller boards

Lead-free and RoHS compliant materials for modern manufacturing

Package or case code 869 provided. Exact ball count, pitch, and mechanical size depend on LC1 variant. Verify in the datasheet

Typical pin configuration includes many SAS PHY lanes, reference clock pins, multiple power rails, and management interfaces such as I2C and JTAG. Use the datasheet for the precise pinout

Thermal characteristics suited for enterprise environments with proper PCB heat spreading. Recommend solid ground planes, thermal vias, airflow, or heatsink as needed

Electrical properties include multiple power rails for core and I/O, clean reference clocks, and differential high-speed signals per SAS spec. Follow the datasheet for voltage ranges, decoupling, and signal integrity layout

Lifecycle

Lifecycle status is mature. As a SAS-3 generation device introduced around 2013, some variants may be nearing end-of-life as SAS-4 24 Gb/s solutions gain adoption

Common alternatives by port count are LSISAS3x28, LSISAS3x36, and LSISAS3x48 for SAS-3 designs, and newer Broadcom SAS-4 expanders for higher speed

For exact pin-compatible or firmware-compatible replacements for LSISAS3X40LC1, contact the Y-IC sales team via our website. We will confirm EOL timing, last-time-buy options, and suitable substitutes

Key Application Areas

Storage enclosure backplanes and JBOD expanders

RAID and HBA fan-out modules

High-density server drive bays and direct-attached storage

Enterprise disk shelves in SAN and NAS systems

Industrial and surveillance storage arrays with many drives

Lab test racks and drive qualification setups

Datasheet

Y-IC hosts the most authoritative datasheet for LSISAS3X40LC1 on our product page. Download it here for accurate specifications, pinout, mechanical drawings, and design guidelines

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