W634GU6RB12J - 4Gb DDR3L SDRAM 933MHz | Winbond
MPN: W634GU6RB12J ✓ Active| 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 |
W634GU6RB12J Overview
DDR3L SDRAM is a type of dynamic random-access memory that operates at a lower voltage (1.35V) compared to standard DDR3 (1.5V), reducing power consumption while maintaining high data rates. It is part of the DDR3L memory family, which is widely used in computing, networking, and industrial applications where power efficiency is critical.
Key features include a 4Gbit density, x16 organization, 933 MHz clock speed, and support for the DDR3L-1866 specification. The device offers a burst length of 8 and supports on-die termination (ODT) for improved signal integrity. It operates over a temperature range of -40°C to +105°C (TCASE) for the 12J industrial plus grade, making it suitable for harsh environments.
The W634GU6RB12J utilizes advanced DRAM process technology to achieve high speed and low power. It includes features such as programmable CAS latency, write leveling, and self-refresh modes to optimize performance and power consumption. The 96-ball VFBGA package provides excellent thermal and electrical performance.
Typical applications include embedded systems, networking equipment, industrial automation, and automotive infotainment. The low voltage and high speed make it ideal for power-sensitive designs that require high memory bandwidth.
When designing with this device, ensure proper decoupling and signal integrity practices are followed. The DDR3L interface requires careful PCB layout to minimize crosstalk and maintain signal quality at high speeds.
Drop-in alternatives for W634GU6RB12J — 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 W634GU6RB12J (same form factor and footprint) — differing in Operating Temperature, Package, Supply Voltage, Memory Size, CAS Latency.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
W634GU6RB-11
✅ Drop-In✓ In Stock
$13.5227 / Unit
View Datasheet →W634GU6NB12J
✅ Drop-In📋 Reference alternative (not in catalog)
W634GU6NB12I
✅ Drop-In📋 Reference alternative (not in catalog)
MT41K256M16TW-107
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$14.1 / Unit
View Datasheet →IS43TR16512B-15HB
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
W634GU6RB12J Maximum Ratings & Electrical Characteristics
| Memory Type | SDRAM - DDR3L |
| Memory Size | 4Gbit |
| Organization | 256M x 16 |
| Interface | Parallel |
| Clock Frequency | 933 MHz |
| Access Time | 20 ns |
| Supply Voltage | 1.35V |
| Package | 96-VFBGA (7.5x13) |
| Operating Temperature | -40°C to +105°C (TCASE) |
| Speed Grade | 12J (DDR3L-1866) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Halogen Free | Yes |
| Burst Length | 8 |
| On-Die Termination | Yes |
W634GU6RB12J Pin Configuration
| Pin A1 | VDD — Power supply |
| Pin A2 | DQ0 — Data input/output 0 |
| Pin A3 | DQ1 — Data input/output 1 |
| Pin A4 | VSS — Ground |
| Pin A5 | DQ2 — Data input/output 2 |
| Pin A6 | DQ3 — Data input/output 3 |
| Pin A7 | VDD — Power supply |
| Pin A8 | DQ4 — Data input/output 4 |
| Pin A9 | DQ5 — Data input/output 5 |
| Pin A10 | VSS — Ground |
| Pin A11 | DQ6 — Data input/output 6 |
| Pin A12 | DQ7 — Data input/output 7 |
Typical Applications
W634GU6RB12J is suitable for 6 applications: Embedded Computing, Networking Equipment, Industrial Automation, Automotive Infotainment, Consumer Electronics, Test and Measurement.
Embedded Computing
The W634GU6RB12J provides high-density, low-power memory for embedded processors and SoCs. Its 4Gbit capacity and 933 MHz speed support demanding applications like real-time data processing and multitasking. The 1.35V operation reduces power consumption, extending battery life in portable systems. The 96-VFBGA package fits compact PCB designs, enabling space-efficient embedded modules.
Recommended
Networking Equipment
In routers, switches, and network appliances, the W634GU6RB12J offers the bandwidth and capacity needed for packet buffering and routing tables. Its 933 MHz clock and 20 ns access time ensure low-latency data transfer. The industrial temperature range (-40°C to +105°C) makes it suitable for outdoor and industrial networking gear. The low 1.35V supply reduces heat generation in dense line cards.
Recommended
Industrial Automation
The W634GU6RB12J is ideal for industrial controllers and PLCs that require reliable memory in harsh environments. Its extended temperature range and RoHS compliance ensure long-term reliability. The 4Gbit capacity supports complex control algorithms and data logging. The parallel interface simplifies integration with industrial SoCs and FPGAs.
Recommended
Automotive Infotainment
The W634GU6RB12J meets the temperature and reliability requirements for automotive infotainment systems. Its 933 MHz speed supports high-resolution displays and audio processing. The 1.35V operation reduces power draw, important for vehicle electrical systems. The 96-VFBGA package withstands vibration and thermal cycling.
Recommended
Consumer Electronics
In smart TVs, set-top boxes, and gaming consoles, the W634GU6RB12J provides the memory bandwidth for smooth multimedia playback. Its low power consumption is ideal for energy-efficient designs. The 4Gbit capacity supports multiple applications simultaneously. The compact package enables slim device designs.
Recommended
Test and Measurement
The W634GU6RB12J is used in oscilloscopes, logic analyzers, and data acquisition systems where high-speed data capture is essential. Its 933 MHz clock and 20 ns access time enable fast data buffering. The industrial temperature range ensures accuracy in varying lab conditions. The low voltage reduces noise in sensitive measurement circuits.
Recommended
Recommended Products Summary
Engineering reference data for W634GU6RB12J — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | W634GU6RB-11 | W634GU6NB12J | W634GU6NB12I |
|---|---|---|---|---|
| Package | 96-VFBGA (7.5x13) | 96-VFBGA (7.5x13) | 96-VFBGA (7.5x13) | 96-VFBGA (7.5x13) |
| Brand | Winbond Electronics | Winbond Electronics | Winbond Electronics | Winbond Electronics |
| Memory Size | 4Gbit | 4Gbit | 4Gbit | 4Gbit |
| Clock Frequency | 933 MHz | 933 MHz | 933 MHz | 800 MHz |
| Access Time | 20 ns | 20 ns | 20 ns | 20 ns |
| Supply Voltage | 1.35V | 1.35V | 1.35V | 1.35V |
| Operating Temperature | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +95°C |
| Speed Grade | 12J (DDR3L-1866) | -11 (DDR3L-1600) | 12J (DDR3L-1866) | 12I (DDR3L-1600) |
Key Differentiators
- Higher speed grade (DDR3L-1866) compared to -11 variant (vs W634GU6RB-11)
- Extended temperature range up to 105°C (vs W634GU6NB12I)
- Same package and pinout as other Winbond DDR3L variants (vs W634GU6NB12J)
Design Notes
For DDR3L signals, maintain controlled impedance of 40-50 ohms for data lines and 50-60 ohms for address/control lines. Keep trace lengths matched within 100 mils to minimize skew. Use ground planes beneath the memory to reduce noise.
Decouple the VDD pins with 0.1uF and 1uF capacitors placed as close as possible to the device. Use a 10uF bulk capacitor on the power plane. Ensure the 1.35V supply has low ripple (<50mV) to maintain signal integrity.
The W634GU6RB12J can dissipate up to 1.5W under heavy load. Ensure adequate airflow or a thermal pad to keep the case temperature below 105°C. The 96-VFBGA package has a thermal resistance of approximately 20°C/W.
Compliance Information
Winbond states all Flash products are Halogen-Free and RoHS compliant. AEC-Q100 not applicable for DRAM.
