The SM2259 features best-in-class performance and low power consumption for mainstream SATA SSDs, while

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SM2259_XT_PB_EN_201910
the DRAM-less SM2259XT reduces BOM cost without compromising performance while enabling 2.5″, 1.8″,
slim SATA(MO-297), mSATA(MO-300) and M.2 form factor SSDs.
The SM2259 and SM2259XT are both 4-channel high-performance SATA 6Gb/s SSD controllers ideally suited
for cost-effective, small form factor and low power SSDs for Enterprise PCs, Consumer PCs, CFast cards and
industrial storage. Its ultra-low power consumption effectively extends battery life and optimizes user
experience. The SM2259 and SM2259XT are complete merchant ASIC/firmware solution supporting 3D NAND
Flash from all major NAND suppliers.
Leveraging Silicon Motion’s proprietary NANDXtend™ error-correcting code (ECC) technology, the SM2259 and
SM2259XT enhance the endurance and retention of 3D NAND. Besides, SM2259 and SM2259XT include such
enterprise features such as end-to-end data path protection and SRAM ECC capabilities to ensure the data
integrity and reliability. SM2259 and SM2259XT also features advanced Direct-to-TLC and SLC
Caching algorithms for optimal sustained performance with TLC and QLC NAND.
Host Interface
Supports SATA interface rate of 6Gb/s
Compliant with Industrial Standard SATA Revision 3.1
Compliant with Industrial Standard ATA/ATAPI-8 and
ACS-3 command
SATA 6Gb/s SSD Controller
with NANDXtend™ Technology
KEY FEATURES
SM2259 / SM2259XT
NANDXtend™ ECC Technology
1KB codeword LDPC Embedded
programmable RAID
Supports all QLC and TLC NAND
Datapath Protection
End to end data protection
SRAM ECC
Optimal Sustained Performance
Direct-to-TLC and SLC Caching
Host Interface
ATA Protocol
NAND Flash Channel
CE/Channel
Performance
DRAM Interface
NAND Flash Support
Security
Temperature Support
Package
SATA 6Gb/s
ATA-8
4
8
– Sequential Read 560 MB/s
– Sequential Write 520 MB/s
– Random Read: 100K IOPs
– Random Write: 90K IOPs
Supports DDR3/3L/4 and LPDDR3
The SM2259 and SM2259XT employs the company’s
proprietary NANDXtend™ ECC technology consisting of
LDPC hard and soft decoding as well as RAID protection that
together enhance the P/E cycles of 3D NAND –
extending the SSD lifespan and ensuring data integrity. The
new generation NANDXtend™ includes 2KB LDPC engine
with advanced firmware algorithm delivers higher power
efficiency, decoding efficiency and correction capability to
maintain consistent data throughout and provide a better
user experience, even as error bits increase throughout the
product lifecycle of NAND Flash.
NANDXtend™ Technology
SPECIFICATIONS
New
New
New
SM2259
SATA 6Gb/s
ATA-8
4
4
– Sequential Read 560 MB/s
– Sequential Write 520 MB/s
– Random Read: 75K IOPs
– Random Write: 75K IOPs
DRAM-less
SM2259XT
Real time full drive encryption with AES
TCG Opal protocol
Hardware SHA 256 and TRNG
—
c-temp: 0°C to 70°C
i-temp: -40°C to 85°C
336-ball TFBGA
2.5” PCB with SM2259
144-ball TFBGA
M.2 PCB with SM2259XT
Supports ONFI 4.0 and Toggle 2.0 interface
SM2259/XT-PB-201910
www.siliconmotion.com
© Copyright 2019 Silicon Motion, Inc.