K4A8G165WC-BCWE000

Introduction

The K4A8G165WC-BCWE000 is a high-performance 8 Gb DDR4 SDRAM (Double Data Rate 4 Synchronous Dynamic Random Access Memory) chip manufactured by Samsung Electronics. As a member of the K4A series, it utilizes advanced 1x nm process technology to deliver high bandwidth, low power consumption, and excellent reliability. With a single-chip capacity of 8 Gb (1 GB) and a 16-bit data width (x16), it is designed for high-speed computing applications. The suffix "000" typically denotes specific packaging details (Tape & Reel or Tray) and version coding.

This chip is widely used in notebooks, industrial controllers, network communication equipment, and high-performance embedded systems.

Key Features

Core Performance

• High Density: 8 Gb (1024 MB) capacity, organized as 512M x 16.
• High Speed: Supports data rates up to 3200 Mbps (PC4-25600), with a clock frequency of up to 1600 MHz.
• Low Power: Operates at 1.2V (VDD/VDDQ), reducing power consumption by approximately 25-30% compared to DDR3, ideal for battery-powered devices.
• Low Latency: CAS Latency (CL) options typically include 16, 18, or 20 (depending on speed bin).

Integrated Functions

• On-Die Termination (ODT): Integrated ODT improves signal integrity by matching impedance on the PCB, reducing reflections.
• Write CRC & Parity: Features Write Cyclic Redundancy Check (CRC) and parity checking for command/address buses to enhance system reliability and data integrity.
• Temperature Compensated Self-Refresh (TCSR): Optimizes refresh rates based on temperature to save power.
• Bank Architecture: Utilizes 8 Banks or 16 Banks (grouped into 4 Bank Groups) to improve concurrent access efficiency.

Package & Reliability

• Package: 96-ball FBGA (Fine-pitch Ball Grid Array) with a ball pitch of 0.8mm. This compact footprint (approx. 13mm x 10.67mm) is suitable for space-constrained designs.
• RoHS Compliant: Lead-free and halogen-free compliant.
• Working Temperature: Commercial Grade: 0°C to +95°C (Case Temperature). (Note: Industrial grade -40°C~85°C versions exist with different suffixes like "BIWE").

Typical Specification Table

Typical Applications

• Computing & Consumer Electronics:
  • Notebooks & Ultrabooks: Used as main system memory (often 2x 8Gb chips for 16GB total).
  • All-in-One PCs & Mini-PCs: High-density in a small footprint.
  • Smart TVs & Set-top Boxes: Supports 4K/8K video decoding and complex OS running.
• Network & Communication:
  • 5G Routers & Gateways: Handles high-speed data packet processing and multi-device concurrent connections.
  • Network Switches: Provides fast buffer memory for data forwarding.
• Industrial & Embedded:
  • Industrial Controllers & HMI: Stable operation in 0-95°C environments for factory automation.
  • Edge Computing Devices: High-speed data caching for AI inference at the edge.
  • Medical Imaging: Supports high-throughput data processing in diagnostic equipment.

Development & Design Notes

1. PCB Layout:
   • Impedance Control: Strict control of 50Ω single-ended and 100Ω differential impedance for DQ, DQS, CK, and CA signals is mandatory.
   • Length Matching: Data group (DQ) must be matched with Strobe (DQS) within ±5mil. Address/Command (CA) must be length-matched to the Clock (CK).
   • Layer Stack-up: Recommended 6-layer or 8-layer board with solid ground planes to minimize crosstalk and EMI.
2. Power Integrity:
   • DDR4 is sensitive to power noise. Place decoupling capacitors (0.1µF, 0.01µF, 10µF) as close as possible to the VDD/VDDQ pins.
   • Use a low-noise LDO or high-efficiency DC-DC converter; keep ripple voltage below 50mV.
3. Thermal Management:
   • Although power consumption is low, ensure adequate airflow or thermal vias under the FBGA package if operating near the upper temperature limit (95°C).
4. Initialization:
   • The memory controller must execute a strict power-up sequence, including ZQ calibration (impedance matching) and write leveling training, to ensure stable operation.
5. Configuration:
   • The "WC" in the part number typically indicates specific speed/voltage characteristics. Verify the exact speed bin (2400/2666/3200) via the full part number decoding on the Samsung datasheet.