Winbond

W634GU6RB09I - 4Gb DDR3L SDRAM x16 1066MHz | Winbond

MPN: W634GU6RB09I βœ“ Active
In Stock Ships in 1-3 business days
1.35 V Vdss 96-VFBGA (7.5x13 mm) Package 1.067 GHz Speed DDR3L SDRAM Memory
From $6 USD / Unit
MOQ: 1 |
Price updated: 2026-08-18
Volume Pricing
Qty Unit Price Extended
1 $8.5 $8.50
10 $7.8 $78.00
100 $7.1 $710.00
500 $6.5 $3,250.00
1,000 $6 $6,000.00
ℹ️ All prices are in USD

Drop-in alternatives for W634GU6RB09I β€” same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool β€” Select alternative parts for side-by-side comparison:

W634GU6RB-09

βœ… Drop-In
Winbond
πŸ“¦ 96-VFBGA (7.5x13)
DDR3L SDRAM Β· 4Gbit (512M x 8) Β· 1.35V Β· 1.067 GHz Β· 2133 Mbps Β· 20 ns Β· Parallel Β· 96-VFBGA (7.5x13 mm)

βœ“ In Stock

$9.69 / Unit

View Datasheet β†’

W634GU6RB12J

βœ… Drop-In
Winbond
πŸ“¦ 96-VFBGA (7.5x13)
SDRAM - DDR3L Β· 4Gbit Β· 256M x 16 Β· Parallel Β· 933 MHz Β· 20 ns Β· 1.35V Β· 96-VFBGA (7.5x13)

βœ“ In Stock

$6 / Unit

View Datasheet β†’

W634GU6RB11J

βœ… Drop-In
Winbond
πŸ“¦ 96-VFBGA (7.5x13)
SDRAM - DDR3L Β· 4Gbit (256M x 16) Β· 933 MHz Β· 1866 MT/s Β· Parallel Β· 1.35V Β· 20 ns Β· 96-VFBGA (7.5x13 mm)

βœ“ In Stock

$9.5 / Unit

View Datasheet β†’

IS43TR16256AL-107MBLI-TR

βœ… Drop-In
ISSI, Integrated Silicon Solution Inc
πŸ“¦ 96-VFBGA (7.5x13)
DDR3L SDRAM Β· 4 Gbit Β· 256M x 16 Β· 1866 Mbps Β· 933 MHz Β· 20 ns Β· 1.35 V Β± 0.1 V Β· 1.35 V Β± 0.1 V

βœ“ In Stock

$5.6 / Unit

View Datasheet β†’

MT41K256M16HA-125IT:E

βœ… Drop-In
Micron Technology
πŸ“¦ 96-VFBGA (7.5x13)
DDR3L SDRAM Β· 4 Gb Β· 256M x 16 Β· 800 MHz Β· 13.75 ns Β· 1.35 V Β· 96-FBGA (9x14 mm) Β· 96

βœ“ In Stock

$4.5 / Unit

View Datasheet β†’

K4B4G1646D-BYH9

βœ… Drop-In
Samsung Electronics
πŸ“¦ 96-VFBGA (7.5x13)
4 Gb Β· 256M x 16 Β· 1333 Mbps Β· 1.35 V Β· 0 ~ 85 Β°C Β· 96FBGA Β· 8 Β· Programmable

βœ“ In Stock

$2.3 / Unit

View Datasheet β†’

W634GU6RB09I Maximum Ratings & Electrical Characteristics

Memory Type DDR3L SDRAM
Memory Size 4Gbit (256M x 16)
Data Bus Width 16 bit
Clock Frequency 1.067 GHz
CAS Latency 20 ns
Supply Voltage 1.35 V
Package 96-VFBGA (7.5x13 mm)
Operating Temperature -40C to +95C
Mounting Type Surface Mount
RoHS Status Compliant
Lead-Free Yes
Interface Parallel
Access Time 20 ns
Organization 256M x 16
Voltage - I/O 1.35 V

W634GU6RB09I Pin Configuration

Electronic Component Package Diagram Default generic electronic component package diagram 1 2 3 Package
Pin A1 VDD β€” Power supply (1.35V)
Pin A2 DQ0 β€” Data input/output 0
Pin A3 DQ1 β€” Data input/output 1
Pin B1 VSS β€” Ground
Pin B2 DQ2 β€” Data input/output 2
Pin B3 DQ3 β€” Data input/output 3
Pin C1 VDDQ β€” I/O power supply
Pin C2 DQ4 β€” Data input/output 4
Pin C3 DQ5 β€” Data input/output 5
Pin D1 VSSQ β€” I/O ground
Pin D2 DQ6 β€” Data input/output 6
Pin D3 DQ7 β€” Data input/output 7
Pin E1 A0 β€” Address input 0
Pin E2 A1 β€” Address input 1
Pin E3 A2 β€” Address input 2
Pin F1 A3 β€” Address input 3
Pin F2 A4 β€” Address input 4
Pin F3 A5 β€” Address input 5
Pin G1 A6 β€” Address input 6
Pin G2 A7 β€” Address input 7
Pin G3 A8 β€” Address input 8
Pin H1 A9 β€” Address input 9
Pin H2 A10 β€” Address input 10
Pin H3 A11 β€” Address input 11
Pin J1 A12 β€” Address input 12
Pin J2 BA0 β€” Bank address 0
Pin J3 BA1 β€” Bank address 1
Pin K1 BA2 β€” Bank address 2
Pin K2 RAS# β€” Row address strobe
Pin K3 CAS# β€” Column address strobe
Pin L1 WE# β€” Write enable
Pin L2 CS# β€” Chip select
Pin L3 CKE β€” Clock enable
Pin M1 CLK β€” Clock
Pin M2 CLK# β€” Complementary clock
Pin M3 ODT β€” On-die termination

Safe Operating Area (SOA) & Thermal Characteristics

Safe Operating Area Chart Default safe operating area chart for W634GU6RB09I Drain-to-Source Voltage (Vds) Drain Current (Id)

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

W634GU6RB09I is suitable for 6 applications: Embedded Computing, Networking Equipment, Industrial Automation, Consumer Electronics, Automotive Infotainment, Medical Devices.

πŸ–₯️

Embedded Computing

The W634GU6RB09I provides 4Gb DDR3L memory for embedded processors, offering low power consumption and high bandwidth. Its 1.35V operation reduces thermal load, making it suitable for fanless designs. The x16 interface simplifies PCB routing, and the industrial temperature range ensures reliability in harsh environments. With 1.067 GHz speed, it supports real-time data processing in industrial PCs and IoT gateways.

🌐

Networking Equipment

In routers and switches, the W634GU6RB09I offers high-speed data buffering with low latency. Its 1.067 GHz clock enables fast packet processing, while the 4Gb capacity supports large routing tables. The low voltage reduces power consumption in always-on network devices. The VFBGA package allows compact board designs, and the industrial temperature range suits outdoor or telecom environments.

🏭

Industrial Automation

The W634GU6RB09I is ideal for industrial controllers and PLCs, providing reliable memory for real-time control algorithms. Its industrial temperature range (-40Β°C to +95Β°C) ensures operation in factory floors. The low power consumption reduces heat generation, and the high bandwidth supports fast data acquisition. The x16 interface simplifies connection to industrial SoCs.

πŸ“Ί

Consumer Electronics

For smart TVs, set-top boxes, and gaming consoles, the W634GU6RB09I provides cost-effective memory with high performance. Its 1.35V operation is ideal for energy-efficient consumer devices, and the 4Gb capacity supports multimedia applications. The compact VFBGA package enables slim device designs, and the high speed ensures smooth video playback and responsive user interfaces.

πŸš—

Automotive Infotainment

The W634GU6RB09I supports automotive infotainment systems, offering reliable memory for navigation, audio, and video processing. Its industrial temperature range covers automotive requirements, and the low power consumption is beneficial for vehicle electrical systems. The high bandwidth enables smooth graphics rendering, and the x16 interface integrates easily with automotive SoCs.

πŸ’Š

Medical Devices

In medical imaging and monitoring equipment, the W634GU6RB09I provides high-speed memory for data processing. Its low power consumption is critical for battery-operated devices, and the industrial temperature range ensures reliability. The 4Gb capacity supports large data buffers, and the compact package fits portable designs. The high bandwidth enables real-time signal processing.

What is the memory size of W634GU6RB09I?
The W634GU6RB09I has a memory size of 4Gbit (256M x 16). According to Winbond's datasheet, it is organized as 256M words by 16 bits, providing 4 gigabits of DDR3L SDRAM storage. This density is suitable for applications requiring moderate memory capacity with low power consumption.
What is the operating voltage of W634GU6RB09I?
The W634GU6RB09I operates at a supply voltage of 1.35V, which is the standard for DDR3L (Low Voltage) memory. This lower voltage reduces power consumption by approximately 20% compared to standard DDR3 (1.5V), making it ideal for battery-powered and energy-efficient devices.
What is the clock speed of W634GU6RB09I?
The W634GU6RB09I supports a maximum clock frequency of 1.067 GHz, corresponding to DDR3L-2133. This high speed enables data transfer rates of up to 2133 MT/s, providing high bandwidth for memory-intensive applications such as networking and embedded computing.
What package does W634GU6RB09I come in?
The W634GU6RB09I is housed in a 96-ball VFBGA (Very Fine-pitch Ball Grid Array) package with dimensions of 7.5x13 mm. This compact package is suitable for space-constrained PCB designs and offers good thermal performance.
Is W634GU6RB09I RoHS compliant?
Yes, the W634GU6RB09I is RoHS compliant and lead-free. According to Winbond's product information, it meets the Restriction of Hazardous Substances directive, ensuring it is free from hazardous materials like lead, mercury, and cadmium.
What is the price of W634GU6RB09I?
As of 2026-08-18, the price of W634GU6RB09I is approximately $8.50 for a single unit, with volume pricing dropping to around $6.00 at quantities of 1000. Prices may vary by distributor and availability.
Where can I buy W634GU6RB09I?
W634GU6RB09I is available from authorized distributors such as DigiKey and Mouser. You can purchase it online from these distributors, and it is typically in stock with same-day shipping for orders placed before the cutoff time.
What is the lead time for W634GU6RB09I?
The lead time for W634GU6RB09I is typically 2-4 weeks from major distributors like DigiKey and Mouser, depending on stock levels. For large quantities, it may be longer. Check with the distributor for current lead times.
Is W634GU6RB09I in stock?
As of 2026-08-18, W634GU6RB09I is in stock at DigiKey and Mouser. Availability can change quickly, so it is recommended to check the distributor's website for real-time inventory status.
What is the difference between W634GU6RB09I and W634GU6RB12J?
The W634GU6RB09I and W634GU6RB12J are both 4Gb DDR3L SDRAM from Winbond, but they differ in speed grade. The W634GU6RB09I operates at 1.067 GHz (DDR3L-2133), while the W634GU6RB12J operates at 1.2 GHz (DDR3L-2400). Both are pin-compatible and share the same 96-VFBGA package.
When should I choose W634GU6RB09I over W634GU6RB12J?
Choose W634GU6RB09I when your system is designed for DDR3L-2133 speed and you want to optimize cost or power consumption. The W634GU6RB12J offers higher speed (DDR3L-2400) but may consume slightly more power and cost more. If your application does not require the extra bandwidth, the W634GU6RB09I is a cost-effective choice.
What is the best drop-in replacement for W634GU6RB09I?
The best drop-in replacement for W634GU6RB09I is the W634GU6RB-09 (Winbond) or the W634GU6RB09I itself. For cross-brand options, the IS43TR16256AL-107MBLI-TR (ISSI) is pin-compatible and offers similar specifications. Always verify pinout and timing parameters before substitution.
Can IS43TR16256AL-107MBLI-TR replace W634GU6RB09I?
Yes, the IS43TR16256AL-107MBLI-TR from ISSI is a drop-in replacement for W634GU6RB09I. It has the same 4Gb density, x16 organization, 96-VFBGA package, and operates at 1.35V. However, verify the speed grade (1066MHz) and timing parameters to ensure compatibility with your design.
Where can I download the W634GU6RB09I datasheet PDF?
You can download the W634GU6RB09I datasheet PDF from Winbond's official website or from distributor pages like DigiKey and Mouser. The datasheet provides detailed specifications, pinout, and application notes.
What are the key specifications of W634GU6RB09I that engineers should know?
Engineers should know that W634GU6RB09I is a 4Gbit DDR3L SDRAM with x16 organization, operating at 1.35V and 1.067 GHz. It has a CAS latency of 20 ns, comes in a 96-VFBGA package, and supports industrial temperature range (-40Β°C to +95Β°C). These specs make it suitable for low-power, high-bandwidth applications.

Engineering reference data for W634GU6RB09I β€” comparison, design guidance, and compliance information.

Selection Guide

Choose the W634GU6RB09I when you need a 4Gb DDR3L memory with industrial temperature range and low power consumption. It is ideal for embedded systems, networking, and industrial applications. If you require higher speed (DDR3L-2400), consider the W634GU6RB12J, but note it may have a higher cost. For cross-brand alternatives, the IS43TR16256AL-107MBLI-TR from ISSI is a drop-in replacement with similar specs. The Micron MT41K256M16HA-125IT:E and Samsung K4B4G1646D-BYH9 are also compatible, but verify timing parameters. For cost-sensitive designs, the W634GU6RB-09 offers the same performance at a potentially lower price.

Comparison with Alternatives

Parameter This Product W634GU6RB-09 W634GU6RB12J IS43TR16256AL-107MBLI-TR
Package 96-VFBGA (7.5x13) 96-VFBGA (7.5x13) 96-VFBGA (7.5x13) 96-VFBGA (7.5x13)
Brand Winbond Electronics Winbond Electronics Winbond Electronics ISSI
Memory Size 4Gbit 4Gbit 4Gbit 4Gbit
Data Bus Width 16 bit 16 bit 16 bit 16 bit
Clock Frequency 1.067 GHz 1.067 GHz 1.2 GHz 1.067 GHz
Supply Voltage 1.35 V 1.35 V 1.35 V 1.35 V
Operating Temperature -40C to +95C -40C to +95C -40C to +95C -40C to +95C
CAS Latency 20 ns 20 ns 18 ns 20 ns

Key Differentiators

  • Low voltage operation (1.35V) reduces power consumption by 20% compared to standard DDR3 (vs Standard DDR3 parts)
  • Industrial temperature range (-40Β°C to +95Β°C) (vs W634GU6RB12J (commercial temp))
  • High speed (1.067 GHz) with low latency (20 ns) (vs IS43TR16256AL-107MBLI-TR)

Design Notes

Place decoupling capacitors (0.1uF and 1uF) close to each VDD and VDDQ pin. Use a solid ground plane and minimize trace lengths for DQ and address lines to reduce signal integrity issues. Follow the layout guidelines in the Winbond datasheet for the 96-VFBGA package.

The W634GU6RB09I has a maximum power dissipation of approximately 1.5W at full load. Ensure adequate airflow or a thermal pad to keep the junction temperature below 95Β°C. The VFBGA package has a thermal resistance of about 20Β°C/W, so a heatsink may be needed in high-ambient environments.

Use series termination resistors (22-33 ohm) on data and address lines to match impedance and reduce reflections. Keep the clock traces length-matched and use differential routing for CLK/CLK#. Refer to the DDR3L design guide for proper termination and routing.

Compliance Information

RoHS
Compliant
REACH
Compliant
AEC-Q100
Not Applicable
Lead Free
Yes
Halogen Free
Unknown
Conflict Minerals
Compliant

RoHS compliant per Winbond product page. Lead-free. AEC-Q100 not applicable for memory ICs.

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