Industrial DDR4 DRAM

Series overview

Industrial DDR4 is the workhorse for substation controllers, industrial PCs, edge gateways, and vision hosts that need solder-down DRAM with wide-temperature coverage. Loongtion DDR4 series focuses on 8Gb monolithic FBGA78 (×8) and FBGA96 (×16) paths with −40°C to +85°C industrial grades and China-localized supply options for dual-source programs. Teams use this series both as a second source beside big-brand PNs and as a primary design-in when long supply and BOM control matter more than chasing the newest consumer density. The cards below are the active industrial DDR4 SKUs — open each product for organization, ball map, speed bin, and temperature grade before RFQ.

Technical points to align

Pin-to-pin and functional alternatives hinge on ball map (×8 FBGA78 vs ×16 FBGA96 — never mix), data-rate bin (DDR4-2666 vs DDR4-3200 with host downclock), 1.2V SSTL, and temperature envelope. Documented cross-references include Micron MT40A* and Samsung K4A8G165* class PNs. Validate training and SPD/timing on the target SoC before production. CXMT domestic incumbents are listed as cross-reference with temperature advantages called out on each page. Rank, fly-by topology, and PCB length matching still belong to the board designer — a Loongtion functional alternative assumes the host can train to the same JEDEC class, not that every layout quirk is waived.

How to select in this series

Search the incumbent PN on the cross-reference catalog, then open the matching product page for density, package, and grade. Use the DDR4 selection guide when comparing commercial vs industrial temperature risk on outdoor cabinets. Application stories under Applications show how teams shortlist wide-temp DDR4 in the field. If the platform is still on DDR3, stay on DDR3 series unless the controller change is already funded. For next-gen bandwidth, compare DDR5 only after confirming SoC support and training budget.