K4AAG085WM-BCRC - 32Gb DDR4 SDRAM x8 1.2V | Samsung
MPN： K4AAG085WM-BCRC ✓ 啟用中K4AAG085WM-BCRC 概覽
DDR4 SDRAM (Double Data Rate 4 Synchronous Dynamic Random Access Memory) is the fourth generation of the DDR DRAM hierarchy: DRAM -> synchronous DRAM -> DDR SDRAM -> DDR4 SDRAM -> memory subsystem of a computing platform. Compared with DDR3, DDR4 lowers the core supply to 1.2V (about 25% lower power per Samsung), uses a bank-group architecture, and raises pre-fetch and data-rate limits, making it the dominant main-memory technology in servers, desktops, and embedded controllers.
Key family features include the 1.2V VDD supply with separate 1.2V VDDQ, on-die termination (ODT), bank-group architecture with up to 16 banks, programmable CAS latency, and a CRC/CA parity option on the command/address bus. The x8 organization simplifies layout versus x16 variants at equal density and matches ECC-native memory controllers. The -BCRC speed suffix denotes one of Samsung's DDR4 speed grades; the 'B' die/grade codes identify the fab process generation used by Samsung for its DDR4 lineup.
Technically, DDR4 SDRAM synchronizes all operations to a differential clock (CK/CK#) and transfers two data words per clock cycle on the DQ bus. Samsung's DDR4 devices integrate DLL-based output timing, a 1.2V SSTL12 I/O interface, and thermal features that support reliable operation in dense memory subsystems.
Typical applications include server DIMMs and memory-down designs on x86 and ARM platforms, industrial gateways, networking line cards, and FPGA-based processing boards that use DDR4 memory controllers.
Design consideration: always follow Samsung's layout guidance for length-matched, impedance-controlled DQ/CA routing (typically 40-ohm on-die-terminated nets) and verify the exact speed grade and CAS latency mapping of the -BCRC suffix in the official datasheet before finalizing the memory controller configuration.
This page synthesizes distributor stock data, same-family drop-in alternatives, and design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 K4AAG085WM-BCRC — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： K4AAG085WM-BCRC （相同外形與佔位） — 差異在於 Package, Interface, Operating Temperature, Density, Data Rate.
K4AAG085WM-BCTD
✅ 直接替換✓ 有庫存
$9.95 / 單位
查看資料表 →K4AAG085WA-BCRC
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →K4AAG085WA-BCWE
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →K4AAG085WA-BCTD
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →K4AAG085WA-BCPB
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →K4AAG085WM-BCRC 最大額定值與電氣特性
| 記憶體類型 | DDR4 SDRAM |
| 組織 | x8 |
| Supply Voltage (VDD) | 1.2 V |
| I/O Voltage (VDDQ) | 1.2 V |
| Max Data Rate | Up to 3200 Mbps/pin (family max per Samsung DDR4 page) |
| 介面 | SSTL12 |
| 封裝 | 78-ball FBGA |
| 安裝類型 | Surface Mount |
| Architecture | Bank-group DDR4 |
| Termination | On-Die Termination (ODT) |
| Clock | Differential clock CK/CK# |
K4AAG085WM-BCRC 78-ball fbga 腳位配置指南
K4AAG085WM-BCRC（78-ball fbga 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： K4AAG085WM-BCRC.
請參閱 資料表 以查看完整腳位配置。
典型應用
K4AAG085WM-BCRC 適用於 6 應用s: Server Main Memory (Memory-Down), Embedded Industrial Controllers, Networking Line Cards, FPGA Processing Boards, Desktop and Client Computing, Test and Measurement Instruments.
Server Main Memory (Memory-Down)
Server platforms require large, reliable main-memory arrays with ECC support. The K4AAG085WM-BCRC's x8 organization is the standard width for ECC computation, and its 1.2V supply with DDR4 bank-group architecture matches modern server memory controllers from Intel and AMD. Placed directly on the board (memory-down) in a 78-ball FBGA footprint, it eliminates SO-DIMM/U DIMM connectors, saving height and improving signal integrity for high data rates up to the family's 3200 Mbps/pin. Designers must implement fly-by command/address routing, on-die termination, and controller read/write training to meet DDR4 timing margins at these speeds.
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Embedded Industrial Controllers
Industrial gateways, PLCs, and edge controllers need dense, low-power DRAM for buffering and local processing. The 1.2V operation of the K4AAG085WM-BCRC reduces memory-subsystem power roughly 25% versus equivalent DDR3 solutions per Samsung's DDR4 page, easing thermal design in sealed fanless enclosures. The 78-ball FBGA surface-mount footprint suits automated assembly on standard industrial PCB processes. Because industrial environments see wide temperature swings, verify the operating temperature range and refresh requirements (including 1x/2x/4x refresh modes supported by DDR4) against the Samsung datasheet for the -BCRC grade before finalizing.
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Networking Line Cards
Switch, router, and network-appliance line cards use DDR4 SDRAM for packet buffers, flow tables, and control-plane memory. The K4AAG085WM-BCRC's high per-device density minimizes device count on space-constrained line cards, and the x8 bus width allows parallel devices sharing a common fly-by CA bus with individual chip-selects. The family's 3200 Mbps/pin capability supports the bandwidth demanded by multi-gigabit networking data paths. Careful DQS strobe length matching within plus-or-minus 25 mils and ODT configuration are required to close timing at full data rate; Samsung's DDR4 design guide provides the reference topology for these memory-down networks.
推薦
FPGA Processing Boards
Xilinx/AMD and Intel FPGA boards use hardened DDR4 memory controllers (MIG/EMIF) to attach external DRAM for signal processing, video frame buffers, and acceleration workloads. The K4AAG085WM-BCRC attaches to these hardened PHY blocks through the standard DDR4 interface: differential CK/CK#, CA bus, DQS strobes, and ODT. The 78-ball FBGA x8 part matches the controller's default x8 configuration, simplifying IP setup. Designers must enter the correct speed grade for -BCRC into the memory IP configuration and perform calibration (write leveling, read training) at bring-up; the high density also reduces the number of devices needed per bank group.
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Desktop and Client Computing
Client desktops and workstations use DDR4 SDRAM in both U DIMM modules and memory-down designs. The K4AAG085WM-BCRC can populate module PCBs or be soldered directly on compact client boards where connector height is restricted. Samsung's DDR4 family delivers up to 3200 Mbps/pin at 1.2V, matching mainstream client memory-controller capability. The x8 organization supports standard ECC-off and ECC-on client configurations alike. For module builders, SPD EEPROM data must be programmed with the -BCRC grade's exact timings so BIOS memory training selects valid CAS latency and tRCD/tRP values per the Samsung datasheet.
推薦
Test and Measurement Instruments
Oscilloscopes, logic analyzers, and protocol analyzers require fast, deep acquisition memory to capture long signal records at high sample rates. The K4AAG085WM-BCRC provides high per-device density and the DDR4 family's high burst bandwidth, letting instruments stream acquisition data into main memory at multi-GB/s rates. Its 78-ball FBGA footprint allows dense stacking of multiple devices around the acquisition ASIC. Instrument designers must account for refresh-induced latency jitter (tRFC windows) in real-time capture paths, typically using FIFO pre-buffering, and should qualify the -BCRC speed grade's timing table against the instrument's memory controller IP.
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推薦產品摘要
工程參考資料，適用於 K4AAG085WM-BCRC — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | K4AAG085WM-BCTD | K4AAG085WA-BCRC | K4AAG085WA-BCWE | K4AAG085WA-BCTD |
|---|---|---|---|---|---|
| Package | 78-ball FBGA | 78-ball FBGA - same | 78-ball FBGA - same | 78-ball FBGA - same | 78-ball FBGA - same |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics |
| Memory Type | DDR4 SDRAM | DDR4 SDRAM | DDR4 SDRAM | DDR4 SDRAM | DDR4 SDRAM |
| Organization | x8 | x8 | x8 | x8 | x8 |
| Supply Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Speed Grade | -BCRC | -BCTD | -BCRC (same) | -BCWE | -BCTD |
| Termination | On-Die Termination (ODT) | ODT | ODT | ODT | ODT |
主要差異化特點
- Higher per-device density than 8Gb B/C-die parts (對比K4A8G085WC-BCRC)
- x8 organization native to ECC server memory (對比K4AAG165WA-BCRC (x16 variant))
- Multiple same-family speed grades on one footprint (對比K4AAG085WA-BCWE)
設計說明
DDR4 memory-down layout with the K4AAG085WM-BCRC requires controlled-impedance routing: approximately 40-ohm single-ended DQ/DQS/DM nets and CA nets, with fly-by command/address topology terminated through on-die termination. Keep DQS/DQ length matching within tight skews per Samsung's DDR4 design guide, and place VTT termination with bulk and 0.1uF decoupling capacitors distributed along the CA/DQ nets. The 78-ball FBGA requires via-in-pad or dog-bone escape routing on fine ball pitch; follow IPC and Samsung land-pattern recommendations.
The device operates from 1.2V VDD and 1.2V VDDQ rails; provide separate, well-decoupled supplies or carefully shared planes with sufficient current headroom for simultaneous bank activation bursts. Estimate: peak current depends on density and data rate, so size the VRM using the Samsung datasheet IDD specifications for the -BCRC grade rather than generic family values. Add a VTT terminating rail at 0.6V with fast transient response, since ODT termination current changes abruptly with read/write turnaround.
Do not assume K4AAG (WM die) and K4A8G (B/C die) parts are interchangeable in controller configuration: density, address mapping, and tRFC refresh timing differ between families, and wrong initialization causes silent data corruption. Always program SPD or controller device trees with the exact -BCRC timing table from the current Samsung datasheet revision, and re-run memory training (write leveling, VREF DQ training) at every hardware revision. Samsung reserves the right to change specifications without notice, so re-verify on each new date code.
At data rates approaching the family's 3200 Mbps/pin capability, eye margins shrink rapidly with stub length. Keep DQS/DQ traces short and symmetric, avoid stubs on CA nets, and enable ODT settings (typically RTT_NOM and RTT_WR per the controller's training results) matched to the board topology. Simulate the fly-by CA network with IBIS models from Samsung to confirm monotonic crossing of VIH/VIL at the last device on the bus before committing to PCB fabrication.
合規資訊
Compliance status for the exact K4AAG085WM-BCRC MPN was not stated in the retrieved web data. Request Samsung environmental compliance certificates via your distributor.
