Samsung Electronics

K4A8G085WB-BITD - 8Gb DDR4 SDRAM 2666Mbps | Samsung

Name: K4A8G085WB-BITD
Brand: Samsung Electronics
Price: 5.15 USD
Availability: InStock

MPN: K4A8G085WB-BITD ✓ Active

In Stock (99,999) Ships in 1-3 business days

1.2 V Vdss 78FBGA Package DDR4 SDRAM Memory

$5.15 USD / Unit

MOQ: 1 |

Volume Pricing

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

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for K4A8G085WB-BITD — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

K4A8G085WB-BIWE

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📦 78FBGA

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K4A8G085WB-BCTD

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📦 78FBGA

Same 8Gb B-die, higher speed grade (3200 Mbps)

📋 Reference alternative (not in catalog)

K4A8G085WB-BICH

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📦 78FBGA

DDR4 SDRAM · 8Gb · 1G x 8 · 1.2V · 2400 Mbps (DDR4-2400) · 78-ball FBGA · 0°C to 85°C · 170mA

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K4A8G085WB-BCRC

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📦 78FBGA

DDR4 SDRAM · 8 Gb · 1G x 8 · 2400 Mbps · 1.2 V · 0°C to 85°C · 78-ball FBGA · 78

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$6.8 / Unit

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K4A8G085WB-BIWE

✅ Drop-In

Samsung Electronics

📦 78FBGA

DDR4 SDRAM · 8 Gb · 1G x 8 · 3200 Mbps · 1.2 V · 0°C to +85°C · 78-FBGA · Surface Mount

✓ 99,999 In Stock

$6.5 / Unit

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K4A8G085WB-BCTD

✅ Drop-In

📦 78FBGA

Same 8Gb B-die, higher speed grade (3200 Mbps)

📋 Reference alternative (not in catalog)

K4A8G085WB-BICH

✅ Drop-In

Samsung Electronics

📦 78FBGA

DDR4 SDRAM · 8Gb · 1G x 8 · 1.2V · 2400 Mbps (DDR4-2400) · 78-ball FBGA · 0°C to 85°C · 170mA

✓ 99,999 In Stock

$4.96 / Unit

View Datasheet →

K4A8G085WB-BCRC

✅ Drop-In

Samsung Electronics

📦 78FBGA

DDR4 SDRAM · 8 Gb · 1G x 8 · 2400 Mbps · 1.2 V · 0°C to 85°C · 78-ball FBGA · 78

✓ 99,999 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
CAS Latency	[DATA_NEEDED: CAS Latency]
Row Cycle Time (tRC)	[DATA_NEEDED: tRC]
Refresh Cycle Time (tRFC)	[DATA_NEEDED: tRFC]
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

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

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.

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🌐

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.

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🚗

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.

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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.

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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.

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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.

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Recommended Products Summary

What is the memory density of K4A8G085WB-BITD?

The K4A8G085WB-BITD has a memory density of 8 gigabits (Gb), which is equivalent to 1 gigabyte (GB) per chip. According to the Samsung datasheet, it is organized as 1G x 8, meaning 1 billion words of 8 bits each. This density is typical for DDR4 modules used in laptops and desktops.

What is the operating voltage of K4A8G085WB-BITD?

The K4A8G085WB-BITD operates at a supply voltage of 1.2V, which is the standard voltage for DDR4 SDRAM. This lower voltage compared to DDR3 (1.5V) reduces power consumption by about 20%, making it suitable for energy-efficient systems. The device also supports a temperature range of -40°C to +95°C.

What is the data rate of K4A8G085WB-BITD?

The K4A8G085WB-BITD supports a data rate of 2666 Mbps (megabits per second), which corresponds to DDR4-2666 or PC4-2133. This speed grade is common for mainstream memory modules. The device is part of Samsung's B-die family, known for excellent overclocking potential and low latency.

What is the package type of K4A8G085WB-BITD?

The K4A8G085WB-BITD is housed in a 78-ball FBGA (Fine-Pitch Ball Grid Array) package. This surface-mount package is standard for DDR4 memory chips, offering a compact footprint and good thermal performance. The 78FBGA package is designed for high-density PCB layouts in memory modules and embedded systems.

Is K4A8G085WB-BITD suitable for industrial applications?

Yes, the K4A8G085WB-BITD is suitable for industrial applications because it operates over an extended temperature range of -40°C to +95°C. This makes it reliable in harsh environments such as factory automation, automotive, and outdoor networking equipment. The 1.2V operation also helps reduce heat generation.

What is the price of K4A8G085WB-BITD?

As of 2026-08-19, the K4A8G085WB-BITD is priced at approximately $5.15 for a single unit, with volume discounts available. For example, at 1000 units, the price drops to around $3.80 per unit. Prices may vary by distributor and availability, so check current stock at LCSC or Octopart.

Where can I buy K4A8G085WB-BITD?

The K4A8G085WB-BITD is available from several distributors including LCSC, Octopart, and Wolfchip. As of 2026-08-19, LCSC lists it in stock at $5.152, and Octopart shows 43,820 units in stock. You can also check Mouser and DigiKey for availability and pricing.

What is the lead time for K4A8G085WB-BITD?

The lead time for K4A8G085WB-BITD is typically 2-4 weeks from major distributors, depending on stock levels. As of 2026-08-19, LCSC and Octopart show it in stock, so immediate shipment is possible. For large orders, lead time may extend to 6-8 weeks. Contact your preferred distributor for current lead times.

Is K4A8G085WB-BITD in stock?

Yes, the K4A8G085WB-BITD is currently in stock at multiple distributors. As of 2026-08-19, Octopart reports 43,820 units in stock, and LCSC lists it as available. Wolfchip also shows 1,130 units in stock. Availability can change quickly, so check the distributor's website for real-time inventory.

What is the difference between K4A8G085WB-BITD and K4A8G085WB-BCTD?

The K4A8G085WB-BITD and K4A8G085WB-BCTD are both 8Gb DDR4 SDRAM from Samsung, but they differ in speed grade. The BITD variant operates at 2666 Mbps, while the BCTD variant operates at 3200 Mbps. Both are pin-to-pin compatible and share the same 78FBGA package, but the BCTD offers higher bandwidth for performance-critical applications.

Can K4A8G085WB-BITD be replaced by K4A8G085WB-BIWE?

Yes, the K4A8G085WB-BIWE is a drop-in replacement for K4A8G085WB-BITD. Both are 8Gb DDR4 SDRAM with the same 1G x 8 organization and 78FBGA package. The BIWE variant may have a different speed grade or temperature rating, so verify the specific parameters before substitution. According to Samsung's product family, they are pin-compatible.

What is the best cross-brand equivalent for K4A8G085WB-BITD?

A cross-brand equivalent for K4A8G085WB-BITD is the Micron MT40A512M16JY-07EAIT:B, which is a 8Gb DDR4 SDRAM with similar specifications. However, it has a different organization (512M x 16) and package (96-ball FBGA), so it is not pin-compatible. For a true drop-in replacement, stick with Samsung's K4A8G085WB family or check with your distributor for cross-reference tools.

What are the key specifications of K4A8G085WB-BITD that engineers should know?

The K4A8G085WB-BITD is an 8Gb DDR4 SDRAM organized as 1G x 8, operating at 2666 Mbps with a 1.2V supply. It comes in a 78FBGA package and supports an industrial temperature range of -40°C to +95°C. These specs make it suitable for high-performance computing and industrial applications. According to the Samsung datasheet, it is part of the B-die family, known for low latency and overclocking headroom.

Where can I download the K4A8G085WB-BITD datasheet PDF?

The K4A8G085WB-BITD datasheet PDF is available from multiple sources. You can download it from AllDatasheet at https://www.alldatasheet.com/datasheet-pdf/pdf/1179093/SAMSUNG/K4A8G085WB-BITD.html or from DigChip. The datasheet contains 73 pages of detailed specifications, pinout, and timing diagrams.

What is the pinout of K4A8G085WB-BITD?

The K4A8G085WB-BITD uses a 78-ball FBGA package with a specific pinout defined in the datasheet. Key pins include VDD and VSS for power, DQ0-DQ7 for data, and address pins A0-A16. The full pinout is available in the Samsung datasheet, which provides a detailed ball map and functional descriptions.

Engineering reference data for K4A8G085WB-BITD — comparison, design guidance, and compliance information.

Selection Guide

Choose the K4A8G085WB-BITD when you need a reliable 8Gb DDR4 SDRAM with industrial temperature support and a balance of speed and power efficiency. It is ideal for networking, automotive, and industrial applications. If you require higher speed (3200 Mbps), consider the K4A8G085WB-BCTD, but verify temperature range. For overclocking in consumer systems, the B-die BITD is preferred. If you need a drop-in replacement with similar specs, the K4A8G085WB-BIWE or BICH are suitable, but check their speed grades and temperature ratings. For cross-brand options, Micron's MT40A512M16JY is not pin-compatible, so stick with Samsung's family for drop-in compatibility.

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
Data Rate	2666 Mbps	[DATA_NEEDED]	3200 Mbps	[DATA_NEEDED]
Supply Voltage	1.2 V	1.2 V	1.2 V	1.2 V
Operating Temperature	-40°C to +95°C	[DATA_NEEDED]	[DATA_NEEDED]	[DATA_NEEDED]
Speed Grade	DDR4-2666	[DATA_NEEDED]	DDR4-3200	[DATA_NEEDED]

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.