company blog about SAMSUNG K4A4G165WF-BCWE 4Gb DDR4 Synchronous Dynamic Random Access Memory

Shenzhen Mingjiada Electronics Co., Ltd. supplies and recycles Samsung K4A4G165WF-BCWE 4Gb DDR4 synchronous dynamic random-access memory.

I. K4A4G165WF-BCWE Product Overview

The K4A4G165WF-BCWE is a 4Gb (512MB) x 16-bit synchronous dynamic random-access memory (DRAM) mass-produced by Samsung Semiconductor in accordance with the standard JEDEC DDR4 specification. Manufactured using a mature 1Xnm DRAM process, featuring DDR4-3200 high-speed specifications and a commercial-grade 96-ball FBGA package. It combines three core advantages: high performance, low power consumption and high signal integrity. Designed for mass-production applications such as embedded terminals, network equipment, industrial control motherboards and consumer-grade PC secondary memory, it provides stable, high-speed memory computing power for general-purpose embedded systems.

The K4A4G165WF-BCWE features a synchronous double data rate architecture, utilising differential clocking, bidirectional differential data strobing (DQS) and an 8-way prefetch transfer mechanism. It is fully compatible with DDR4 standard specifications and is a cost-effective, industry-standard x16-bit-width DDR4 chip. It is currently in stable mass production and available through dual distribution channels: bulk procurement of genuine, in-stock products and stock buy-back schemes.

II. Key Electrical and Architectural Parameters of the K4A4G165WF-BCWE

1. Basic Memory Specifications

Total Capacity: 4 Gb (equivalent to 512 MB of physical memory per chip)

Memory Organisation: 256 M × 16-bit (x16-bit width)

Internal Architecture: 8 physical banks, divided into 2 bank groups, arranged in a 32M × 16 × 8 array

Data Rate: 3200 MT/s (DDR4-3200, base clock 1600 MHz)

Standard Timings: CL22-22-22, programmable CAS latency ranging from 10 to 24, adjustable CWL read/write latency of 16/20

Burst Length: Supports BL8 and BL4 dual modes; on-chip switching requires no hardware modification

2. Power Supply and Temperature Range Specifications

Core voltage VDD/VDDQ: 1.2V (operating range 1.14V–1.26V, POD point-to-point voltage standard)

Activation boost voltage VPP: 2.5V (2.375V–2.75V)

Operating temperature: Commercial grade 0°C to +85°C (model suffix BCWE denotes standard commercial temperature specification)

Refresh Mechanism: Standard refresh cycle at ambient temperature is 7.8 μs; built-in TCSE (Temperature-Compensated Self-Refresh) ensures data retention by automatically increasing the refresh frequency at high temperatures

3. Packaging and Environmental Standards

Package Type: 96-ball FBGA (Flip Chip Ball Grid Array), featuring a compact form factor and excellent thermal dissipation

Environmental Attributes: Lead-free and halogen-free, fully compliant with the RoHS Directive

Standard Packaging: Tray packaging, with a standard quantity of 1,120 pieces per tray, suitable for automated SMT assembly

III. Analysis of Key Technical Characteristics of the K4A4G165WF-BCWE

1. High-Speed, Stable Signal Design

ODT on-chip termination resistors: Built-in programmable on-chip termination that matches the PCB transmission impedance, significantly reducing reflection interference in high-speed traces, simplifying hardware routing, and enhancing signal integrity at 3200Mbps high frequencies;

Internal ZQ Pin Self-Calibration: With an external 240Ω precision resistor, IO impedance calibration is automatically completed upon power-up, ensuring minimal impedance drift during long-term operation and reducing system failure rates;

Asynchronous Hardware Reset: A dedicated reset pin enables rapid initialisation of the memory array upon power-up, supporting cold start and reboot scenarios for embedded devices;

Differential CK/CK# clocks: Differential clocking suppresses power supply noise, enabling stable operation at the full 3200 rate even in noisy industrial and network power supply environments.

2. Comprehensive low-power optimisation

Compared to the previous-generation DDR3 1.5V voltage standard, static power consumption of the 1.2V core supply has been reduced by approximately 20 per cent:

Multi-stage power-saving modes: Three-tier energy-saving mechanisms—deep power-down, local array self-refresh and lightweight self-refresh—significantly reduce device standby power consumption;

TCSE intelligent self-refresh: Automatically extends refresh intervals in low-temperature scenarios, reducing switching losses and extending the battery life of battery-powered devices;

Low leakage current process: Mature 1Xnm DRAM process with excellent leakage current control, resulting in lower power consumption during long-term data retention in standby mode.

3. Highly Reliable Data Protection Mechanisms

Built-in CRC (Cyclic Redundancy Check) performs real-time verification of read and write data, effectively identifying bus transmission errors and enhancing the long-term operational stability of industrial and networking equipment;

Multi-Bank Concurrent Scheduling: Parallel activation of dual bank groups reduces wait delays during row-column switching, resulting in a significant improvement in concurrent read/write performance for multi-tasking;

Wide Timing Compatibility: A wide range of programmable CL parameters ensures compatibility with entry-level memory controllers, lowering the barriers to selecting a host controller.

IV. Key Application Scenarios for the K4A4G165WF-BCWE

Leveraging its x16 bit width, 3200 MHz high-speed operation, commercial-grade ambient temperature operation and compact FBGA package, the K4A4G165WF-BCWE chip is suitable for hardware solutions across multiple sectors:

Network and communications equipment: Switches, routers, industrial gateways, and cache memory for 5G edge small cells; the wide bus width supports high-speed packet forwarding;

Industrial embedded control: PLC industrial control motherboards, machine vision cameras, and HMI displays; the stable temperature range is suitable for standard workshop operating conditions;

Consumer electronics: secondary memory for all-in-one PCs, high-performance tablets, TV main controller cache, and portable storage expansion modules;

AI edge devices: lightweight computing boxes and smart surveillance cameras, supporting image caching and real-time inference operations;

Desktop/laptop memory modules: DIY expansion modules and spare memory chips for branded computers, compatible with JEDEC-standard DDR4 controllers across all platforms.

V. Summary of Product Advantages for K4A4G165WF-BCWE

High versatility: Standard JEDEC DDR4-3200 with a x16 wide-lane architecture; plug-and-play compatibility with the vast majority of DDR4 memory controllers on the market, requiring no additional drivers or adapters;

Cost-effective: The 4Gb die offers a moderate capacity and lower material costs compared to 8Gb die, making it suitable for mass production of mid- to low-end embedded applications;

Mature mass production: Samsung’s standardised, mature process ensures high yield rates, stable lead times and ample long-term stock availability, whilst also supporting the recycling of end-of-life materials;

Hardware-friendly design: The compact 96FBGA package saves PCB layout space, whilst built-in features such as ODT and self-calibration simplify peripheral matching circuits, shortening hardware development cycles;

Compliance and versatility: Halogen-free, RoHS-compliant packaging meets export certification requirements for consumer and industrial equipment.