SAMSUNG

K4A4G085WE-BCPB

A: The K4A4G085WE-BCPB is optimized for high‑speed, energy‑efficient memory systems. Key specifications include a 4Gb density (512 MB) organized as 512M × 8, a data bus width of 8 bits, and a high‑speed POD (Pseudo Open Drain) interface typical of DDR4 technology. The device features 16 internal memory banks (32M words per bank). It supports a maximum clock rate of 2133 MHz (or higher depending on configuration), with a maximum access time of 0.18 ns (180 ps). The device operates within a supply range of 1.14V to 1.26V and typically draws 84 mA of operating current. The package is an RoHS‑compliant, surface‑mount 78‑pin FBGA with a 0.8 mm ball pitch .

A: The part number follows Samsung's standard memory device naming convention, which provides detailed configuration information: Part Number Field Meaning K Samsung Semiconductor memory product prefix 4 Product type: DRAM A DRAM sub‑type: DDR4 SDRAM 4G Density: 4 Gigabits (4 Gb = 512 MB) 08 Data bus width: 8 bits (x8 organization) 5 Refresh architecture / internal configuration code W Operating voltage: 1.2V (standard DDR4 voltage) E Die revision: E‑die (fifth generation DDR4 die) ‑‑‑‑ Separator B Speed bin group: DDR4‑2133 / DDR4‑2400 speed group CPB Specific speed grade suffix: BCPB indicates DDR4‑2133 (15‑15‑15) or compatible speed grade The "4G" in the part number indicates 4 gigabits of memory—not 4 gigabytes. A single chip provides exactly 512 MB of storage, which is one‑eighth of 4 GB. This distinction is crucial for calculating the correct number of chips required on a PCB to achieve a target system memory capacity.

A: The K4A4G085WE-BCPB is a DDR4 SDRAM component that operates at multiple speed grades depending on the system configuration and memory controller settings. The most consistent specification across reliable data sources indicates a maximum data rate of 2133 Mbps (PC4‑17000) per pin. This is supported by several authoritative distributor references confirming the 2133 Mbps rate and a 0.18 ns access time . However, some third‑party sources list higher speed grades such as 3200 Mbps, 4267 Mbps, or mention operation in DDR4‑2400 memory modules . Engineering caution is required: the exact maximum data rate should always be verified against the current official Samsung datasheet. The inconsistencies reflect that this component may be used in different memory module configurations with varying speed bins, or the BCPB suffix may cover a family of speed grades within the DDR4‑2133 to DDR4‑2400 range. For the most accurate specification for a specific design, consult the Samsung datasheet revision 1.6 (73 pages total) or contact Samsung directly .

A: The K4A4G085WE-BCPB is a commercial DDR4 SDRAM component that has been in mass production for several years. The part status varies across distributor databases: LCSC (Shenzhen) lists the part status as Mass Production AVA Q (UK) lists the part status as NRND (Not Recommended for New Designs) and LTB (Last Time Buy) JLCSMT lists the stock status as 0 pieces Based on the manufacturer's official part number structure, this is an older 4Gb E‑die DDR4 component that is likely approaching its End‑of‑Life (EOL). New designs should consider more current DDR4 or DDR5 alternatives for long‑term supply assurance. The device is intended for a wide range of high‑performance computing applications, including personal computers and laptops, servers and data centers, networking and telecommunications equipment, industrial automation systems, and consumer electronics such as gaming consoles and smart TVs .