Technical resources
Browse free whitepapers (with PDF download), selection guides, application notes, Q&A, and glossary entries for industrial DRAM, SSD, card, and module design-in. Use them to shortlist SKUs, check temperature and interface fit, and brief your BOM review — product catalog PDFs are on the Downloads page.
Whitepapers
All PDF downloadsWhitepaper · Free PDF
Industrial LPDDR4X Memory Guide
LPDDR4X for power-sensitive industrial SoCs — voltage, bandwidth, and temperature-bin trade-offs.
Whitepaper · Free PDF
Industrial DDR4 Memory Selection Guide
Selection notes for industrial DDR4 DRAM — JEDEC compliance, wide-temp screening, and common OEM fit checks.
Whitepaper · Free PDF
Industrial DDR3 Memory Selection Guide
How to shortlist industrial DDR3 for embedded hosts — speed bins, temperature grades, and package options.
Guides
View all 12Guide · Free PDF
Industrial DDR5 Memory Selection Guide: What Actually Matters in 202…
A field guide to selecting industrial DDR5 DRAM: temperature grade, speed bin, ball map, and the supply question that decides long-lifecycle designs.
Guide
DDR4 DRAM Chip Cross Reference: Complete Pin-to-Pin Replacement Guid…
A comprehensive guide to cross-referencing and replacing DDR4 8Gb DRAM chips (Micron MT40A1G8WE, MT40A512M16JY, Samsung K4A8G165WB, CXMT CXDQ3BFAM) with Lo…
Guide
Samsung K4A8G165WC-BCWE Replacement: Loongtion DDR4 Wide-Temperature…
Samsung K4A8G165WC DDR4 replacement? Compare package, data rate and temperature grade with Loongtion YZ48G08V / YZ48G16V wide-temp parts.
Guide
Winbond W957A6MB / Samsung K4U6E3S4AM Replacement: Loongtion LPDDR4X…
Winbond W957A6MB or Samsung K4U6E3S4AM LPDDR4X replacement? Compare temperature grades, packages and density options with the Loongtion YZDB family.
Guide
ISSI IS43TR16256BL / Winbond W632GU6KB Replacement: Loongtion DDR3 C…
ISSI IS43TR16256BL or Winbond W632GU6KB DDR3 replacement? Compare specs, temperature grades and pin-out with Loongtion YZ38E16SBB-9MFB-M.
Guide
DDR3 DDR3L Replacement Guide: Cross-Referencing Legacy Industrial Me…
Find drop-in DDR3 and DDR3L replacements for EOL Micron MT41K and Samsung DDR3 parts. Complete cross-reference table with 12+ Loongtion PNs spanning -55°C…
Guide
DDR3 Legacy Replacement: A Field Engineer's Guide
Field checklist for keeping long-life industrial DDR3 boards alive — package, organization, voltage, speed bin, and temperature grade — with CN product and…
More guides
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See the full guides list — 5 more available.
Articles
View all 14Article
DDR4 EOL Timeline 2026: Last Time Buy & Replacement Guide for Indust…
DDR4 is exiting: Samsung stopped accepting DDR4 orders in June 2025, SK hynix and Micron are cutting output, and prices are not expected to fall before end…
Article
DDR4 EOL and the Supply Window: Procurement Strategies for Industria…
Samsung, SK Hynix, and Micron are exiting DDR4 while prices climb and industrial lead times stretch to 20-26 weeks. What procurement teams should do before…
Article
Industrial Temperature Grades: An Engineering Guide to -40, -55, and…
A practical engineering guide to industrial temperature grades: what -40°C~+85°C and -55°C~+105°C ratings actually mean, how they are tested, and when the…
Article
Migrating from DDR3 to DDR5: A Design-First Integration Framework fo…
Industrial system architects rarely have the luxury of designing a single product generation in isolation. A typical PLC or edge gateway platform may start…
Article
Multi-Generational DRAM BOM Strategies: Balancing DDR3, DDR4, and DD…
Industrial equipment such as PLCs, HMIs, and embedded controllers often have production lifecycles exceeding ten years. A product designed today may need t…
Article
DDR4 Signal Integrity Debugging on Multi-Layer Industrial PCBs
You've qualified a DDR4 memory subsystem on a 16 layer industrial PCB at room temperature, only to have it produce intermittent data errors during –40°C co…
Article
Designing Power-Optimized Edge Nodes: A Scenario-Based Guide to LPDD…
Consider a remote industrial IoT gateway deployed in a chemical plant. The gateway must continuously acquire sensor data, run lightweight inference algorit…
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See the full articles list — 7 more available.
Q&A
View all 9Q&A
What Is the Difference Between Industrial and Commercial Temperature…
Industrial temperature memory (-40°C to +85°C) is tested and guaranteed to operate in extreme environments where commercial-grade (0°C to +70°C) memory wou…
Q&A
What are the guidelines for trace impedance (e.g., 40Ω or 50Ω) for D…
What are the guidelines for trace impedance (e.g., 40Ω or 50Ω) for DDR3 signals and the required trace width for a given stack-up?The Loongtion DDR3 SDRAM…
Q&A
Is it acceptable to use through vias instead of blind or backdrilled…
Is it acceptable to use through vias instead of blind or backdrilled vias for DDR3 routing to reduce PCB costs?Routing DDR3 memory interfaces is a balance…
Q&A
How do I compensate for an unbalanced number of vias in DDR3 routing…
How do I compensate for an unbalanced number of vias in DDR3 routing, and what are the signal integrity implications?Unbalanced via count on a DDR3 data or…
Q&A
Why Does DDR3 Memory Have a BGA Footprint with Two Columns of Pads a…
What is the reasoning behind the unique BGA footprint of DDR3 memory packages, with two columns of pads and an empty column in between?The distinctive BGA…
Q&A
Can I swap data wires (e.g., connect DQ0 on the CPU to DQ1 on the me…
Can I swap data wires (e.g., connect DQ0 on the CPU to DQ1 on the memory) on the data bus between the CPU and a DDR3 x16 memory for routing optimization?Ye…
Q&A
For DDR3 layout, what is the acceptable skew tolerance (e.g., 25 mil…
For DDR3 layout, what is the acceptable skew tolerance (e.g., 25 mils) within a net class, and does the reset line require length matching?When designing a…
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See the full q&a list — 2 more available.