K4A8G045WB-BCRC - 8Gb DDR4 2Gx4 2400Mbps B-die | Samsung
N.º de pieza: K4A8G045WB-BCRC ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.9 | $39,00 |
| 100 | $3.55 | $355,00 |
| 500 | $3.25 | $1.625,00 |
| 1.000 | $2.95 | $2.950,00 |
K4A8G045WB-BCRC Descripción general
DDR4 SDRAM (Double Data Rate 4 Synchronous Dynamic Random-Access Memory) is a member of the DRAM family of volatile memory ICs that stores each bit in a transistor-capacitor cell and requires periodic refresh. DDR4 transfers data on both edges of a differential clock, and relative to DDR3 it lowers operating voltage from 1.5V to 1.2V, increases bank count, and improves bandwidth per watt, making it the dominant memory technology in servers, workstations, and desktop platforms.
Key features of this device include 8Gb density in a x4 organization, a 2400 Mbps speed grade, and support for core DDR4 features such as posted CAS, programmable CAS write latency (CWL), internal (self) calibration, on-die termination (ODT) via a dedicated ODT pin, and asynchronous reset, as described in the Samsung K4A8G045WB datasheet.
The B-die process technology provides high speed and high density with strong reliability characteristics. All control and address inputs are synchronized to a pair of externally supplied differential clocks, with inputs latched at the crosspoint of CK rising and CK falling edges. The stated timing specifications apply to DLL-enabled mode of operation.
Typical applications include DDR4 UDIMM, RDIMM, and SODIMM memory modules for servers, desktop PCs, and laptops, as well as networking equipment, data center platforms, and high-performance computing systems where 8Gb x4 density and 2400 Mbps bandwidth are required.
When designing with this component, place decoupling capacitors close to VDD and VDDQ balls, follow DDR4 fly-by routing with controlled impedance traces, and implement proper on-die and board-level termination per JEDEC DDR4 layout practice.
This page synthesizes distributor availability data, drop-in family alternatives, and practical DDR4 design notes not found in the manufacturer datasheet alone.
Alternativas directas para K4A8G045WB-BCRC — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con K4A8G045WB-BCRC (mismo factor de forma y huella) — difiere en Data Rate, Operating Temperature, Supply Voltage, Memory Type, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
K4A8G045WB-BCPB
✅ Sustitución directa✓ En stock
$9.0234 / unidad
Ver hoja de datos →K4A8G085WB-BCRC
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$6.8 / unidad
Ver hoja de datos →K4A8G165WB-BCRC
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$12.57 / unidad
Ver hoja de datos →K4A8G085WB-BICR
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$4.25 / unidad
Ver hoja de datos →K4A8G085WB-BCPB
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$13.7813 / unidad
Ver hoja de datos →K4A8G045WB-BCRC Valores máximos y características eléctricas
| Tipo de memoria | DDR4 SDRAM |
| Density | 8 Gb |
| Organización de memoria | 2G x 4 |
| Speed | 2400 Mbps |
| Supply Voltage (VDD/VDDQ) | 1.2 V |
| Process Technology | Samsung B-die |
| Interfaz | CMOS, differential clock (CK/CK#) |
| Refresh Cycles | 8192 |
| Maximum Supply Current | 211.7 mA |
| Temperatura de funcionamiento | 0 C to 85 C |
| Encapsulado | 78-ball FBGA (PBGA78) |
| Terminals | 78 |
| Tipo de montaje | Surface Mount |
| Key DDR4 Features | Posted CAS, Programmable CWL, Internal (Self) Calibration, ODT, Asynchronous Reset |
| DLL Mode | Timing specified for DLL-enabled operation |
| Estado RoHS | Compliant |
Guía de configuración de pines de K4A8G045WB-BCRC 78-ball fbga (pbga78)
Configuración de pines para K4A8G045WB-BCRC (encapsulado 78-ball fbga (pbga78)). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para K4A8G045WB-BCRC.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
K4A8G045WB-BCRC es adecuado para 6 aplicacións: Server Memory Modules (RDIMM/LRDIMM), Desktop PC UDIMM Memory, Networking and Communication Equipment, Data Center and Cloud Computing Platforms, Industrial PCs and Embedded Controllers, High-Performance Computing (HPC) Accelerator Boards.
Server Memory Modules (RDIMM/LRDIMM)
The K4A8G045WB-BCRC's x4 organization is the standard building block for ECC-protected server DIMMs, where 18 x4 devices form a 72-bit bus (64 data + 8 ECC) and enable single-device data correction on server platforms. Its 8Gb B-die density and 2400 Mbps speed deliver high capacity per module at DDR4-2400 operating points, while on-die termination and internal self-calibration maintain signal integrity across the heavily loaded fly-by topology of registered modules. The 1.2V VDD/VDDQ rails reduce module power versus DDR3 by roughly 20%, improving data center energy efficiency. Designers should follow the RDIMM register and PMIC sequencing requirements alongside the Samsung DDR4 timing tables, which are specified for DLL-enabled operation.
Recomendado
Desktop PC UDIMM Memory
For desktop UDIMMs, the K4A8G045WB-BCRC provides 8Gb per device, allowing 8GB modules with eight x4 dies or 16GB dual-rank designs. The 2400 Mbps speed grade matches mainstream DDR4-2400 JEDEC operating points used by Intel and AMD desktop platforms, and the asynchronous reset and programmable CWL features simplify controller initialization. Its B-die process is known for strong overclocking headroom and tight timing tolerance, which benefits performance-oriented memory designs. Layout teams should decouple VDD and VDDQ with multiple 0402/0603 ceramics per device and length-match DQ/DQS within each nibble lane as required by x4 organization. The 0 C to 85 C commercial range fits typical desktop ambient conditions.
Recomendado
Networking and Communication Equipment
Switch, router, and firewall control planes use x4 DDR4 for ECC-protected buffering and lookup tables. The K4A8G045WB-BCRC supplies 8Gb per device with 2400 Mbps bandwidth, sufficient for packet buffer and flow-table workloads on merchant silicon and network processors. On-die termination reduces external termination component count on point-to-point point-to-multipoint buses typical of networking boards, and posted CAS addressing improves command bus efficiency. The 78-ball FBGA footprint fits the dense memory arrays used on 6-8 layer PCBs. Verify the commercial 0 C to 85 C temperature rating against the equipment environmental spec, and follow controlled-impedance (approximately 40 ohm) trace routing per DDR4 layout guidelines.
Recomendado
Data Center and Cloud Computing Platforms
Cloud server platforms demand maximum memory capacity per socket; the K4A8G045WB-BCRC's 8Gb x4 organization enables the highest device counts and total capacity per module, and x4 devices leverage SDDC error correction to improve RAS characteristics. At 2400 Mbps and 1.2V, the device balances bandwidth against the thermal budget of dense 1U/2U chassis, with maximum supply current of 211.7 mA per die simplifying power provisioning. Samsung's internal self-calibration supports reliable operation across process, voltage, and temperature variation common in always-on data center environments. Designers must provision VPP (2.5V) and VDD/VDDQ rails and implement the JEDEC DDR4 training sequence for link initialization.
Recomendado
Industrial PCs and Embedded Controllers
Industrial PCs, test instruments, and automation controllers use DDR4 SODIMM or solder-down memory; the K4A8G045WB-BCRC suits solder-down and module designs requiring 8Gb density with ECC-grade x4 organization. The asynchronous reset input allows the host to reset the DRAM independently during brown-out recovery, a valuable feature in industrially noisy power environments, and ODT plus self-calibration maintain margins across wide ambient swings. Note that this BCRC grade is rated 0 C to 85 C; for extended temperature requirements select industrial-grade Samsung variants such as the K4A8G085WB-BICR. Follow DDR4 length-matching rules (DQ/DQS matched within the nibble, fly-by for address/command) on the carrier PCB.
Recomendado
High-Performance Computing (HPC) Accelerator Boards
HPC and accelerator cards require dense, high-bandwidth local memory beside the compute engine. The K4A8G045WB-BCRC's 8Gb B-die at 2400 Mbps allows multi-rank arrays delivering tens of GB/s per channel, and the x4 organization provides fine-grained ECC suitable for scientific workloads where silent data corruption is unacceptable. B-die process parts are known for stable timing margins at DDR4-2400, supporting multi-rank signal integrity on high-layer-count accelerator PCBs. Power designers should provision separate VDD/VDDQ plane filtering with bulk plus high-frequency ceramic decoupling near each device, since aggregate current scales with device count. Confirm thermal design keeps junction temperatures within the 85 C commercial limit under sustained compute loads.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para K4A8G045WB-BCRC — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | K4A8G045WB-BCPB | K4A8G085WB-BCRC | K4A8G165WB-BCRC | K4A8G085WB-BICR |
|---|---|---|---|---|---|
| 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 |
| Density | 8 Gb | 8 Gb | 8 Gb | 8 Gb | 8 Gb |
| Organization | 2G x 4 | 2G x 4 | 1G x 8 | 512M x 16 | 1G x 8 |
| Speed | 2400 Mbps | 2400 Mbps | 2400 Mbps | 2400 Mbps | 2666 Mbps class (BI grade) |
| Supply Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Temperature Range | 0 C to 85 C | 0 C to 85 C | 0 C to 85 C | 0 C to 85 C | Industrial grade (extended) |
| Process Technology | B-die | B-die | B-die | B-die | B-die (industrial) |
Diferenciadores clave
- x4 organization enables full ECC and SDDC (frente a K4A8G085WB-BCRC)
- Highest capacity per device on 78-FBGA footprint (frente a K4A8G165WB-BCRC)
- B-die process timing headroom (frente a K4A8G085WB-BICR)
Notas de diseño
Provide separate VDD (core) and VDDQ (I/O) 1.2V rails plus VPP (2.5V) per the DDR4 standard. The K4A8G045WB-BCRC draws up to 211.7 mA maximum supply current per die, so provision the rail for total device count with margin (estimate: 8 devices x 211.7 mA x 1.2V is roughly 2 W worst-case - this is an estimated budget, verify against your controller's utilization pattern). Decouple each device with at least four 100 nF ceramics plus local bulk capacitance; keep the VDDQ plane low-impedance to prevent simultaneous-switching noise from corrupting DQ eyes at 2400 Mbps.
Route DQ/DQS/DM as tightly matched nibble groups (x4 organization means 4 DQ per DQS pair) with length matching inside each group; route address/command in fly-by topology with on-die termination enabled through the ODT pin. Use approximately 40 ohm controlled-impedance traces for point-to-point segments and reference signals to continuous ground planes. At DDR4-2400, run the memory controller's write-leveling and read-training sequence after every reset, since the Samsung datasheet specifies all AC timing in DLL-enabled mode only.
Do not assume cross-organization interchange: the x4 ballout of K4A8G045WB-BCRC differs from x8 (K4A8G085WB) and x16 (K4A8G165WB) parts despite the identical 78-ball footprint, so a physical footprint match is not a functional match. Also confirm the refresh requirement (8192 cycles per refresh window) is met by the controller under elevated temperature - at 85 C ambient, temp-compensated self-refresh or accelerated refresh (2x) may be required. Finally, source only through authorized channels; B-die DDR4 is a common target for remarked and counterfeit devices.
Información de cumplimiento
RoHS certification stated by distributor listing (Lisleapex: FBGA-78 DRAM with RoHS certification). Samsung DDR4 FBGA packages are Pb-free; REACH and conflict-minerals status not stated in provided data.
