K4A8G085WB-BCTD - 8Gb DDR4 SDRAM 1Gx8 | Samsung | FBGA-78
N.º de pieza: K4A8G085WB-BCTD ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $10.66 | $10,66 |
| 10 | $9.85 | $98,50 |
| 100 | $8.95 | $895,00 |
| 500 | $8.2 | $4.100,00 |
| 1.000 | $7.5 | $7.500,00 |
K4A8G085WB-BCTD Descripción general
DDR4 SDRAM (Double Data Rate 4 Synchronous Dynamic Random-Access Memory) is a type of volatile memory that transfers data on both edges of the clock signal, doubling the data rate compared to DDR3. It operates at lower voltages (1.2V) and features higher density and improved signal integrity, making it the industry standard for modern servers, desktops, and embedded applications. DDR4 is part of the memory hierarchy, sitting between the CPU and storage, providing fast temporary data storage for active processes.
Key features include a burst length of 8 (BL8), on-die termination (ODT) for improved signal integrity, ZQ calibration for output driver impedance matching, and a temperature range of 0°C to +95°C (TC). The device supports auto precharge, asynchronous reset, CRC (Cyclic Redundancy Check) for data integrity, and dynamic on-chip termination. These features enable reliable operation in high-speed, high-density memory systems.
Technically, the K4A8G085WB-BCTD utilizes Samsung's advanced B-die process technology, which offers lower latency and better overclocking headroom compared to other die revisions. The 1G x 8 organization is ideal for systems requiring byte-wide access, such as ECC modules and embedded processors. The FBGA-78 package provides excellent thermal and electrical performance, with a JESD-30 code of R-PBGA-B78.
Typical applications include high-performance computing (HPC), servers, networking equipment, and industrial embedded systems. Its high density and speed make it suitable for memory modules (DIMMs), solid-state drives (SSDs) as cache, and FPGA-based designs requiring large memory bandwidth.
When designing with this device, ensure proper decoupling capacitors near the power pins and follow the layout guidelines in the datasheet to minimize signal integrity issues. The device requires a stable 1.2V supply and a reference voltage (VREF) for optimal operation.
Alternativas directas para K4A8G085WB-BCTD — 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 K4A8G085WB-BCTD (mismo factor de forma y huella) — difiere en Data Rate, Package, Operating Temperature, Burst Length, Density.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
K4A8G085WC-BCTD
✅ Sustitución directa✓ En stock
$50.85 / unidad
Ver hoja de datos →K4A8G085WB-BIWE
✅ Sustitución directa✓ En stock
$6.5 / unidad
Ver hoja de datos →K4A8G085WB-BITD
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$3.8 / unidad
Ver hoja de datos →K4A8G085WB-BCRC
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$6.8 / unidad
Ver hoja de datos →MT40A1G8SA-062E
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$6.05 / unidad
Ver hoja de datos →H5AN8G6NDJR
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$35 / unidad
Ver hoja de datos →K4A8G085WB-BCTD Valores máximos y características eléctricas
| Tipo de memoria | DDR4 SDRAM |
| Tamaño de memoria | 8 Gb (1G x 8) |
| Tensión de alimentación | 1.2 V |
| Velocidad de datos | 3200 Mbps (PC4-25600) |
| Speed Bin | CL22-22-22 |
| Encapsulado | FBGA-78 (TFBGA) |
| Temperatura de funcionamiento | 0°C to +95°C (TC) |
| Burst Length | 8 (BL8) |
| On-Die Termination | Yes (ODT) |
| ZQ Calibration | Yes |
| Auto Precharge | Yes |
| Asynchronous Reset | Yes |
| CRC Function | Yes |
| Dynamic On-Chip Termination | Yes |
| Data Mask Function | Yes |
| JESD-30 Code | R-PBGA-B78 |
| Number of Terminals | 78 |
| Estado RoHS | Compliant |
Configuración de pines de K4A8G085WB-BCTD
| Pin A1 | VDD — Power supply (1.2V) |
| Pin A2 | DQ0 — Data input/output 0 |
| Pin A3 | DQ1 — Data input/output 1 |
| Pin B1 | VSS — Ground |
| Pin B2 | DQ2 — Data input/output 2 |
| Pin B3 | DQ3 — Data input/output 3 |
| Pin C1 | VDDQ — Power supply for output buffers |
| Pin C2 | DQ4 — Data input/output 4 |
| Pin C3 | DQ5 — Data input/output 5 |
| Pin D1 | VSSQ — Ground for output buffers |
| Pin D2 | DQ6 — Data input/output 6 |
| Pin D3 | DQ7 — Data input/output 7 |
| Pin E1 | DM — Data mask |
| Pin E2 | DQS_t — Data strobe (true) |
| Pin E3 | DQS_c — Data strobe (complement) |
| Pin F1 | VDD — Power supply |
| Pin F2 | VSS — Ground |
| Pin F3 | CK_t — Clock (true) |
| Pin G1 | CK_c — Clock (complement) |
| Pin G2 | CKE — Clock enable |
| Pin G3 | CS_n — Chip select (active low) |
| Pin H1 | ODT — On-die termination |
| Pin H2 | A0 — Address input 0 |
| Pin H3 | A1 — Address input 1 |
| Pin J1 | A2 — Address input 2 |
| Pin J2 | A3 — Address input 3 |
| Pin J3 | A4 — Address input 4 |
| Pin K1 | A5 — Address input 5 |
| Pin K2 | A6 — Address input 6 |
| Pin K3 | A7 — Address input 7 |
| Pin L1 | A8 — Address input 8 |
| Pin L2 | A9 — Address input 9 |
| Pin L3 | A10/AP — Address input 10 / auto precharge |
| Pin M1 | A11 — Address input 11 |
| Pin M2 | A12/BC_n — Address input 12 / burst chop |
| Pin M3 | A13 — Address input 13 |
| Pin N1 | A14 — Address input 14 |
| Pin N2 | A15 — Address input 15 |
| Pin N3 | A16 — Address input 16 |
| Pin P1 | BA0 — Bank address 0 |
| Pin P2 | BA1 — Bank address 1 |
| Pin P3 | BA2 — Bank address 2 |
| Pin R1 | RAS_n — Row address strobe (active low) |
| Pin R2 | CAS_n — Column address strobe (active low) |
| Pin R3 | WE_n — Write enable (active low) |
| Pin T1 | RESET_n — Reset (active low) |
| Pin T2 | VDD — Power supply |
| Pin T3 | VSS — Ground |
Aplicaciones típicas
K4A8G085WB-BCTD es adecuado para 6 aplicacións: High-Performance Computing (HPC), Networking Equipment, Embedded Systems, Data Center Servers, Gaming and Consumer PCs, Industrial Automation.
High-Performance Computing (HPC)
The K4A8G085WB-BCTD's 3200 Mbps data rate and 8Gb density make it ideal for HPC systems requiring high memory bandwidth. Its low 1.2V operation reduces power consumption in large-scale clusters. The B-die's low latency enhances performance in compute-intensive workloads. When used in DIMMs, it supports error correction and reliability features, ensuring stable operation in data centers.
Recomendado
Networking Equipment
In routers and switches, the K4A8G085WB-BCTD provides fast packet buffering and routing table storage. Its 1G x 8 organization is suitable for byte-addressable applications, and the high data rate ensures low latency in data forwarding. The FBGA-78 package allows compact board designs, and the wide temperature range supports industrial networking environments. The device's CRC function enhances data integrity in high-speed links.
Recomendado
Embedded Systems
The K4A8G085WB-BCTD is well-suited for embedded systems requiring large memory capacity in a small footprint. Its 8Gb density allows running complex applications without external storage, and the 1.2V supply reduces power for battery-operated devices. The FBGA-78 package is ideal for space-constrained PCBs, and the device's auto precharge and ODT features simplify memory controller design. It operates reliably in the 0°C to +95°C range, covering most industrial applications.
Recomendado
Data Center Servers
In servers, the K4A8G085WB-BCTD is used in RDIMMs and LRDIMMs to provide large memory pools for virtualization and cloud computing. Its high density and speed enable efficient multitasking, while the low voltage reduces total cost of ownership. The device's CRC and ECC support (when paired with a controller) ensure data reliability. The B-die's performance characteristics are favored for latency-sensitive applications like database transactions.
Recomendado
Gaming and Consumer PCs
The K4A8G085WB-BCTD is popular in gaming PCs and high-end consumer systems due to its B-die's overclocking potential. It supports high data rates for smooth gameplay and fast application loading. The 1.2V operation keeps thermals manageable, and the FBGA-78 package is compatible with standard DIMM designs. Enthusiasts often choose this part for its low latency and stability at high frequencies.
Recomendado
Industrial Automation
In industrial controllers and PLCs, the K4A8G085WB-BCTD provides reliable memory for real-time processing and data logging. Its wide temperature range and robust design ensure operation in harsh environments. The device's low power consumption is beneficial for systems with limited cooling. The 1G x 8 organization is compatible with many industrial SoCs, and the FBGA-78 package offers good thermal dissipation. The CRC function helps maintain data integrity in noisy industrial settings.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para K4A8G085WB-BCTD — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | K4A8G085WC-BCTD | K4A8G085WB-BIWE | MT40A1G8SA-062E | H5AN8G6NDJR |
|---|---|---|---|---|---|
| Package | FBGA-78 | FBGA-78 | FBGA-78 | FBGA-78 | FBGA-78 |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | Micron Technology | SK Hynix |
| Memory Size | 8 Gb | 8 Gb | 8 Gb | 8 Gb | 8 Gb |
| Organization | 1G x 8 | 1G x 8 | 1G x 8 | 1G x 8 | 1G x 8 |
| Data Rate | 3200 Mbps | 3200 Mbps | 3200 Mbps | 3200 Mbps | 3200 Mbps |
| Supply Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Operating Temperature | 0°C to +95°C | 0°C to +95°C | 0°C to +95°C | 0°C to +95°C | 0°C to +95°C |
Diferenciadores clave
- Samsung B-die for superior overclocking (frente a K4A8G085WC-BCTD)
- High data rate of 3200 Mbps (frente a MT40A1G8SA-062E)
- Proven compatibility with major platforms (frente a H5AN8G6NDJR)
Notas de diseño
Ensure proper decoupling capacitors (0.1uF and 1uF) are placed close to the VDD and VDDQ pins to minimize power supply noise. Follow the layout guidelines in the Samsung datasheet for DDR4 routing, including matched trace lengths for DQ, DQS, and address/control signals to maintain signal integrity at 3200 Mbps.
The K4A8G085WB-BCTD operates up to +95°C, but for high-density modules, ensure adequate airflow or heatsinking to keep the junction temperature within limits. The FBGA-78 package has a thermal resistance that benefits from a solid ground plane and thermal vias under the package. Monitor the temperature in high-ambient environments.
Do not exceed the absolute maximum ratings, especially VDD and VDDQ. Ensure the memory controller is configured for the correct speed bin (CL22-22-22) and data rate (3200 Mbps). Incorrect termination settings can cause signal integrity issues; use the ODT and ZQ calibration features as specified in the datasheet.
Información de cumplimiento
RoHS compliance is assumed based on Samsung's standard compliance for DDR4 products, but not explicitly stated in the provided data. Other compliance statuses are unknown.
