SM2259XT2 - DRAM-less 2-Ch SATA 6Gb/s SSD Controller | SMI
부품 번호: SM2259XT2 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.42 | $34.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.18 | $2,180.00 |
SM2259XT2 개요
An SSD controller (Solid-State Drive controller) is the central ASIC inside an SSD that bridges the host interface (SATA or PCIe) to the NAND flash media. It runs the Flash Translation Layer (FTL), performs wear leveling, garbage collection, bad-block management, and applies ECC to maintain data integrity across the NAND array. The SM2259XT2 is a DRAM-less variant, meaning it uses a portion of the host system's memory or on-chip SRAM for FTL mapping instead of an external DRAM cache, which reduces BOM cost and PCB footprint in space-constrained designs. The SATA host interface positions SM2259XT2 in the mainstream client SSD market, where cost and low power are dominant priorities over the highest throughput.
Key features include support for Toggle 2.0/3.0 and ONFI 3.0/3.1/3.2 NAND interface, integrated NANDXtend ECC with LDPC hard-decision and soft-decision decoding for improved endurance and retention, and 2 channels with up to 4 CE (Chip Enable) targets per channel for flexible NAND array sizing. The controller supports 2D MLC, 3D TLC, and 3D QLC NAND from major flash vendors, enabling a wide range of capacity and cost targets. It operates at ultra-low power to extend mobile battery life, and integrates hardware AES-128/256 for OPAL-based self-encrypting drive (SED) functionality.
The SM2259XT2 uses an SMI-developed 32-bit embedded CPU core with hardware accelerators for NAND interface and ECC. The 2-channel architecture (vs 4-channel on SM2259) is the key differentiator from its predecessor: by halving the channel count and integrating DRAM-less operation, the XT2 targets cost-sensitive client SSDs where sequential throughput above ~560 MB/s is not required. The integrated LDPC ECC engine corrects bit errors across MLC/TLC/QLC endurance transitions and supports RAID-like parity across channels for data path reliability.
Typical applications include 2.5" SATA SSDs for desktops and notebooks, M.2 2280/2242 client SSDs, mSATA and slim SATA (MO-297) modules, retail SSD upgrade kits, and external USB-SATA enclosures. Its small BGA footprint and low power also make it attractive for industrial embedded storage and boot drives. Compared with DRAM-based controllers, the SM2259XT2 trades peak random 4K IOPS for lower cost, while retaining mainstream sequential throughput.
When designing with the SM2259XT2, allocate PCB real estate for proper power-rail decoupling near the BGA balls and provide adequate thermal copper under the exposed die. Validate the firmware MP tool and flash parameter table against the exact NAND vendor and die stepping before mass production, because mixing SM2259XT2 firmware with SM2258XT or SM2259XT firmware images is not supported.
This page aggregates distributor pricing, package drawings, drop-in same-package alternatives, and design notes curated from the manufacturer datasheet, providing engineering context not found in the SM2259XT2 datasheet PDF alone.
드롭인 대체품: SM2259XT2 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
SM2259XT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SM2259XT3
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SM2258XT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SM2259
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAS0902
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SM2259XT2 사양
| Manufacturer | Silicon Motion |
| Part Number | SM2259XT2 |
| Product Type | DRAM-less SATA SSD Controller |
| Host Interface | SATA 6Gb/s (SATA Revision 3.1, backward compatible to 3 Gb/s and 1.5 Gb/s) |
| NAND Interface | Toggle 2.0/3.0 and ONFI 3.0/3.1/3.2 |
| NAND Channels | 2 channels (up to 4 CE per channel) |
| NAND Types Supported | 2D MLC, 3D TLC, 3D QLC |
| DRAM Interface | None (DRAM-less; uses host/embedded memory for FTL mapping) |
| ECC Technology | NANDXtend LDPC (hard + soft decision) |
| Encryption | AES-128/256, OPAL self-encrypting drive (SED) support |
| 패키지 | TFBGA-144, 8 mm x 8 mm |
| Form Factor Targets | 2.5", 1.8", slim SATA (MO-297), mSATA (MO-300), M.2 |
| Power | Ultra-low power design for mobile battery life |
| 실장 유형 | Surface Mount (BGA) |
| RoHS 상태 | Compliant |
SM2259XT2 tfbga-144, 8 mm x 8 mm 핀 구성 가이드
SM2259XT2(tfbga-144, 8 mm x 8 mm 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: SM2259XT2.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
SM2259XT2 적합 용도: 7 애플리케이션s: 2.5" SATA SSD for Notebooks and Desktops, M.2 2280/2242 Client SSD Modules, mSATA and Slim SATA (MO-297) Industrial Modules, Portable External USB-SATA SSD Enclosures, Retail SSD Upgrade Kits for Legacy PCs, Embedded Boot Drive for Routers and Industrial Gateways, Surveillance and Edge Recording Storage.
2.5" SATA SSD for Notebooks and Desktops
The SM2259XT2's 2-channel SATA 6Gb/s interface and ultra-low power envelope make it a natural fit for 2.5" SATA SSDs that ship inside mainstream notebook and desktop upgrades. The DRAM-less architecture removes external DDR from the BOM, which reduces PCB layer count and component cost in the constrained 2.5" form factor, while Toggle 3.0 / ONFI 3.2 NAND support lets OEMs pair it with mainstream TLC or QLC flash. Typical 2.5" SSDs based on XT2 deliver sequential read near SATA's 560 MB/s ceiling while consuming only modest active power, preserving battery life versus 4-channel controllers. The integrated LDPC ECC plus AES-128/256 encryption ensures NAND endurance and TCG OPAL 2.0 compliance for retail client drives.
추천
M.2 2280/2242 Client SSD Modules
M.2 SATA SSDs use the SM2259XT2 to fit mainstream client throughput onto the small M.2 2280 and 2242 card footprints. The TFBGA-144 8x8 mm package leaves enough room for a 2-4 CE NAND array plus the controller on the same 2280 PCB, while the DRAM-less design trims BOM and height. Toggle 2.0/3.0 and ONFI 3.0/3.1/3.2 interface compatibility enables pairing with Samsung, Micron, SK Hynix, Kioxia, and YMTC 3D TLC/QLC NAND. Compared with the 4-channel SM2259XT, the SM2259XT2 trades top-end sequential throughput for significantly lower cost, which fits budget M.2 SSDs where the host already accepts SATA's 560 MB/s ceiling rather than PCIe NVMe bandwidth.
추천
mSATA and Slim SATA (MO-297) Industrial Modules
The SM2259XT2 in TFBGA-144 is widely used inside mSATA (MO-300) and slim SATA (MO-297) form-factor modules for industrial PCs, point-of-sale terminals, and embedded systems. The 2-channel design supports up to 4 CE per channel, sufficient for the 32 GB to 512 GB capacities common in industrial boot drives, and the wide Toggle/ONFI NAND support allows pairing with high-endurance industrial-grade 3D TLC. Ultra-low active power matters in fanless industrial enclosures where SSD self-heating is a long-term reliability concern. NANDXtend LDPC ECC maintains bit error rate across the wide temperature swings typical of factory-floor and outdoor deployments.
추천
Portable External USB-SATA SSD Enclosures
External portable SSDs use an M.2 or mSATA SSD built around the SM2259XT2, bridged to USB via a separate USB-SATA controller. The SM2259XT2's ultra-low power draws less current from the host USB bus, which improves battery life on laptops and reduces thermal load inside the small aluminum enclosure. Its 2-channel SATA 6Gb/s interface delivers sufficient throughput for general file storage, photo backup, and game library use, where it does not need to max out PCIe NVMe speeds. OPAL 2.0 SED support lets the SM2259XT2-based module run hardware encryption end-to-end, even when paired with a USB bridge chip.
추천
Retail SSD Upgrade Kits for Legacy PCs
Retail SSD upgrade kits target legacy desktops and laptops that lack NVMe M.2 slots, so they default to SATA 2.5" or mSATA modules built around the SM2259XT2. The DRAM-less architecture supports aggressive retail pricing, while still offering mainstream sequential read near SATA's 560 MB/s ceiling and far better 4K random IOPS than rotating hard drives. OPAL-based hardware encryption and NANDXtend LDPC ECC add retail differentiation against bare TLC competitor drives. The controller's broad Toggle/ONFI NAND compatibility lets the kit vendor source flash opportunistically across multiple NAND vendors without re-validating silicon.
추천
Embedded Boot Drive for Routers and Industrial Gateways
Industrial routers, gateways, and edge devices use SM2259XT2-based mSATA or M.2 modules as the primary boot drive for the embedded OS (OpenWrt, Linux, VxWorks). The 2-channel DRAM-less architecture keeps cost low for high-volume embedded deployments, while Toggle/ONFI NAND support enables industrial-temperature 3D TLC that survives -40C to +85C operating envelopes. The TFBGA-144 8x8 mm package supports reflow on standard SMT lines, and the ultra-low idle power profile reduces standby drain in always-on edge nodes. NANDXtend LDPC ECC extends the endurance window for the frequent small-block write workload typical of system logging.
추천
Surveillance and Edge Recording Storage
Surveillance NVRs and edge recording appliances need a small, low-power SATA storage controller that can sustain sequential write throughput from multiple camera streams without bursting into DRAM shortages. The SM2259XT2's 2-channel design supports the typical 1-2 TB capacity range of a recording appliance using 3D TLC or QLC NAND, while NANDXtend LDPC maintains bit error rate through the sustained sequential-write workload. Its ultra-low active power keeps the NVR chassis within thermal limits, and the TFBGA-144 footprint fits compact NVR motherboards. OPAL SED support is useful for surveillance deployments handling sensitive customer video.
추천
추천 제품 요약
엔지니어링 참조 데이터: SM2259XT2 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | SM2259XT | SM2259XT3 | SM2258XT | SM2259 | MAS0902 |
|---|---|---|---|---|---|---|
| Brand | Silicon Motion | Silicon Motion | Silicon Motion | Silicon Motion | Silicon Motion | Maxio |
| Package | TFBGA-144 (8x8 mm) | TFBGA-144 (8x8 mm) - same | TFBGA-144 (8x8 mm) - same | TFBGA-144 (8x8 mm) - same | TFBGA-144 (8x8 mm) - same | TFBGA-144 (8x8 mm) - same |
| Host Interface | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s |
| NAND Channels | 2 | 4 | 2 | 2 | 4 | 2 |
| External DRAM | No (DRAM-less) | No (DRAM-less) | No (DRAM-less) | No (DRAM-less) | Yes (external DRAM) | No (DRAM-less) |
| NAND Support | Toggle 2.0/3.0, ONFI 3.0/3.1/3.2, 2D MLC/3D TLC/3D QLC | Toggle 2.0/3.0, ONFI 3.0/3.1/3.2, 2D MLC/3D TLC/3D QLC | Toggle 2.0/3.0, ONFI 3.0/3.1/3.2, 2D MLC/3D TLC/3D QLC | Toggle 2.0/2.x, ONFI 2.x/3.0, 2D MLC/3D TLC | Toggle 2.0/3.0, ONFI 3.0/3.1/3.2, 2D MLC/3D TLC/3D QLC | Toggle 2.0/3.0, ONFI 3.0/3.x, 3D TLC/QLC |
| ECC | NANDXtend LDPC (hard + soft decision) | NANDXtend LDPC | NANDXtend LDPC | SMI LDPC | NANDXtend LDPC | Maxio ECC (LDPC) |
| Encryption | AES-128/256, OPAL SED | AES-128/256, OPAL SED | AES-128/256, OPAL SED | AES-128/256, OPAL SED | AES-128/256, OPAL SED | AES, OPAL SED |
| Form Factor Targets | 2.5"/1.8"/mSATA/MO-297/M.2 | 2.5"/1.8"/mSATA/MO-297/M.2 | 2.5"/1.8"/mSATA/MO-297/M.2 | 2.5"/mSATA/M.2 | 2.5"/1.8"/mSATA/MO-297/M.2 | 2.5"/M.2 |
주요 차별점
- DRAM-less operation in TFBGA-144 trims BOM vs DRAM-equipped SM2259 (vs SM2259)
- Higher NAND channel count and throughput vs older generation (vs SM2258XT)
- Same TFBGA-144 8x8 mm footprint across SM2259 family simplifies PCB reuse (vs MAS0902)
- Ultra-low power envelope for mobile and battery-aware clients (vs SM2259XT3)
설계 노트
Estimated: the TFBGA-144 8x8 mm package dissipates the SM2259XT2's active power over the BGA ball grid, so PCB copper under the die acts as the primary heatsink. In a 2.5" SSD layout, place at least four thermal vias under the exposed-die BGA and tie the top layer to a continuous copper pour to keep junction temperature below 85 C at 1 W active dissipation. Avoid placing hot components (DC-DC buck inductors) directly opposite the controller on the back side; instead stagger them so the controller's thermal pad sees its own unbroken copper island.
Decouple the SM2259XT2's internal core and I/O rails locally with a 1 uF X7R ceramic plus a 0.1 uF X7R capacitor within 2 mm of the relevant BGA ball pair. Place a 10 uF bulk capacitor on each of the 1.2 V core and 3.3 V host-side rails. The 3.3 V SATA rail should be generated by a high-PSRR LDO (e.g., RT9161 family) or buck regulator; do not power the controller directly from a noisy upstream 5 V rail, as SATA PHY jitter is sensitive to rail noise above ~10 mV pk-pk in the 100 kHz-10 MHz band.
Never load firmware images written for SM2258XT, SM2259XT, or SM2259XT3 onto an SM2259XT2: per SMI MP-tool workflow guidance, each controller revision has its own PTable and firmware signing, and mixing them bricks the SSD. Always confirm the package marking reads 'SM2259XT2' (not XT, XT3, or SM2259) before applying firmware. Also validate the flash vendor part number against the controller's qualified vendor list (QVL) before mass production; an unsupported NAND die stepping can trigger uncorrectable ECC errors in the field.
Route all SATA TX/RX differential pairs to the SM2259XT2's host-side BGA balls with 90 ohm differential impedance and length matching within 150 mil (3.8 mm). Keep the SATA connector stub length short and avoid routing the pair across plane splits. For NAND channels, match each 8-bit bus to within 50 mil across CE lanes to keep byte-skew within the controller's recovery window. Use a 4-layer stack-up with continuous GND planes on layer 2 and 4 to provide return paths for the high-speed NAND and SATA interfaces.
Disable SATA spread-spectrum clocking only if your crystal does not meet SATA 6 Gb/s jitter spec; the SM2259XT2's internal PHY expects a low-jitter 30 MHz reference. Place the reference crystal within 5 mm of the controller's XI/XO balls and guard it with a GND ring tied to the local ground pour. Series-terminate NAND RE/RE# and WE strobes with 33 ohm if the channel length exceeds 25 mm, otherwise leave them un-terminated per the controller's internal driver strength.
규정 준수 정보
RoHS and REACH compliance per JLCPCB part detail. AEC-Q100 is not applicable for client SSD controllers; choose an industrial-rated SSD module for automotive.
