K4A8G085WB-BITD - 8Gb DDR4 SDRAM 2666Mbps | Samsung
MPN: K4A8G085WB-BITD ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.15 | $5.15 |
| 10 | $4.9 | $49.00 |
| 100 | $4.5 | $450.00 |
| 500 | $4.1 | $2,050.00 |
| 1,000 | $3.8 | $3,800.00 |
K4A8G085WB-BITD Overview
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, doubling the throughput of DDR3. It operates at a lower voltage of 1.2V, reducing power consumption compared to previous generations. DDR4 is the industry standard for modern computing, offering higher density and speed for servers, desktops, and mobile devices.
Key features include a density of 8Gb, a 1G x 8 organization, and a speed grade of 2666 Mbps (PC4-2133). The device supports a supply voltage of 1.2V and operates over a temperature range of -40°C to +95°C, making it suitable for industrial applications. The 78FBGA package provides a compact footprint with excellent thermal and electrical performance.
The K4A8G085WB-BITD utilizes Samsung's advanced B-die process technology, which is renowned for its tight timing margins and high-frequency stability. This makes it a preferred choice for enthusiasts and system integrators seeking maximum memory performance. The device includes on-die termination (ODT) and programmable read/write latency for signal integrity optimization.
Typical applications include high-performance desktop and laptop memory modules, server DIMMs, networking equipment, and embedded systems requiring high bandwidth and reliability. Its industrial temperature range and robust design also make it suitable for automotive and IoT applications.
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 careful routing of the high-speed data lines.
Drop-in alternatives for K4A8G085WB-BITD — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with K4A8G085WB-BITD (same form factor and footprint) — differing in Package, Data Rate, Operating Temperature, Supply Voltage, Density.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
K4A8G085WB-BIWE
✅ Drop-In✓ In Stock
$6.5 / Unit
View Datasheet →K4A8G085WB-BCTD
✅ Drop-In✓ In Stock
$7.5 / Unit
View Datasheet →K4A8G085WB-BICH
✅ Drop-In✓ In Stock
$4.96 / Unit
View Datasheet →K4A8G085WB-BCRC
✅ Drop-In✓ In Stock
$6.8 / Unit
View Datasheet →K4A8G085WB-BIWE
✅ Drop-In✓ In Stock
$6.5 / Unit
View Datasheet →K4A8G085WB-BCTD
✅ Drop-In✓ In Stock
$7.5 / Unit
View Datasheet →K4A8G085WB-BICH
✅ Drop-In✓ In Stock
$4.96 / Unit
View Datasheet →K4A8G085WB-BCRC
✅ Drop-In✓ In Stock
$6.8 / Unit
View Datasheet →K4A8G085WB-BITD Maximum Ratings & Electrical Characteristics
| Memory Type | DDR4 SDRAM |
| Density | 8 Gb |
| Organization | 1G x 8 |
| Data Rate | 2666 Mbps |
| Supply Voltage | 1.2 V |
| Operating Temperature | -40°C to +95°C |
| Package | 78FBGA |
| Mounting Type | Surface Mount |
| Number of Pins | 78 |
| Interface | Parallel |
| RoHS Status | Compliant |
| Lead-Free | Yes |
K4A8G085WB-BITD Pin Configuration
| Pin A1 | VDD — Power supply |
| Pin A2 | VSS — Ground |
| Pin B1 | DQ0 — Data input/output 0 |
| Pin B2 | DQ1 — Data input/output 1 |
| Pin C1 | DQ2 — Data input/output 2 |
| Pin C2 | DQ3 — Data input/output 3 |
| Pin D1 | DQ4 — Data input/output 4 |
| Pin D2 | DQ5 — Data input/output 5 |
| Pin E1 | DQ6 — Data input/output 6 |
| Pin E2 | DQ7 — Data input/output 7 |
| Pin F1 | A0 — Address input 0 |
| Pin F2 | A1 — Address input 1 |
Typical Applications
K4A8G085WB-BITD is suitable for 6 applications: High-Performance Computing, Networking Equipment, Automotive Infotainment, Industrial Automation, Consumer Electronics, Embedded Systems.
High-Performance Computing
The K4A8G085WB-BITD delivers 2666 Mbps data rate and 8Gb density, making it ideal for HPC systems requiring high bandwidth and low latency. Its B-die architecture ensures stable operation at high frequencies, supporting demanding workloads like scientific simulations and data analytics. The 1.2V operation reduces power consumption, crucial for large-scale clusters.
Recommended
Networking Equipment
In routers and switches, the K4A8G085WB-BITD provides high-speed packet buffering and forwarding. Its 2666 Mbps data rate ensures fast data throughput, while the industrial temperature range (-40°C to +95°C) allows operation in outdoor or uncontrolled environments. The 78FBGA package enables compact PCB designs for space-constrained networking hardware.
Recommended
Automotive Infotainment
The K4A8G085WB-BITD supports automotive infotainment systems with its high bandwidth and reliability. It operates over -40°C to +95°C, meeting automotive temperature requirements. The 1.2V supply reduces heat generation, important for in-cabin electronics. Its 8Gb density allows storage of navigation maps and multimedia data.
Recommended
Industrial Automation
For industrial controllers and PLCs, the K4A8G085WB-BITD offers reliable memory with extended temperature range. Its 2666 Mbps speed ensures fast data processing for real-time control. The B-die design provides low latency, critical for deterministic operations. The 78FBGA package is robust for harsh environments.
Recommended
Consumer Electronics
In high-end desktops and gaming PCs, the K4A8G085WB-BITD is used in memory modules for its overclocking potential. The B-die is renowned for tight timings and high frequency stability, appealing to enthusiasts. Its 8Gb density allows large memory capacities, and the 1.2V operation is energy-efficient.
Recommended
Embedded Systems
The K4A8G085WB-BITD is suitable for embedded systems requiring high-density memory with industrial temperature support. Its 8Gb capacity and 2666 Mbps speed enable complex applications like real-time data acquisition. The 78FBGA package is ideal for compact embedded boards, and the low power consumption extends battery life in portable devices.
Recommended
Recommended Products Summary
Engineering reference data for K4A8G085WB-BITD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | K4A8G085WB-BIWE | K4A8G085WB-BCTD | K4A8G085WB-BICH |
|---|---|---|---|---|
| Package | 78FBGA | 78FBGA | 78FBGA | 78FBGA |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics |
| Density | 8 Gb | 8 Gb | 8 Gb | 8 Gb |
| Organization | 1G x 8 | 1G x 8 | 1G x 8 | 1G x 8 |
| Supply Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
Key Differentiators
- B-die architecture for overclocking (vs K4A8G085WB-BCTD)
- Industrial temperature range (vs K4A8G085WB-BIWE)
- Wide availability (vs K4A8G085WB-BICH)
Design Notes
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 high-speed signal routing, including impedance matching and length matching for DQ and DQS lines.
The K4A8G085WB-BITD operates over -40°C to +95°C. For high-density modules, ensure adequate airflow or heatsinking to keep the junction temperature within limits. The 78FBGA package has a thermal resistance that should be considered in the design.
Use on-die termination (ODT) settings as recommended in the datasheet to improve signal integrity on the data bus. Proper termination reduces reflections and crosstalk, especially at 2666 Mbps. Simulate the memory channel to verify timing margins.
Compliance Information
RoHS compliant per Samsung product page. Not AEC-Q100 qualified as it is a memory IC.
