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Winbond Electronics Corporation W632GU8KB-15
- Part No.:
- W632GU8KB-15
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 78-TFBGA
- Datasheet:
-
W632GU8KB-15.pdf
- Description:
- IC DRAM 2GBIT PAR 78WBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,336
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Product details
Overview
W632GU8KB-15 from Winbond is a 2 Gb (256 MB) DDR3L SDRAM organized as 32M × 8 banks × 8 bits, operating at 1.35 V nominal supply with DDR3L-1333 speed grade (9-9-9 CL/tRCD/tRP), 667 MHz clock frequency, and industrial-grade temperature range (0°C to 95°C). It delivers 1333 MT/s data rate per pin in systems requiring low-voltage memory with JEDEC-compliant timing, ZQ calibration, and dynamic ODT for signal integrity in embedded controllers and networking platforms.
For engineers reviewing the W632GU8KB-15 datasheet, W632GU8KB-15 pinout, W632GU8KB-15 application, or W632GU8KB-15 equivalent, this page provides verified DDR3L timing parameters, ball mapping, CAS Write Latency (CWL = 5–7), supported additive latency (AL = 0, CL−1, CL−2), and real-world use cases in industrial SoC memory subsystems where power efficiency and thermal robustness are critical.
Technical Context
The W632GU8KB-15 implements an 8-bit prefetch architecture with eight internal banks enabling concurrent access, and uses differential CK/CK# and DQS/DQS# signaling synchronized to source-synchronous strobes. Its DLL aligns DQ transitions to DQS edges for precise read/write timing, while programmable mode registers (MR0–MR3) configure CAS latency (CL = 6, 8, 9, 10), CWL (5–7), PASR, ASR, and dynamic ODT (Rtt_WR).
It supports full DDR3L features including posted CAS, auto-precharge, burst chop (BC4), interleaved/nibble-sequential burst ordering, write leveling for system-level timing calibration, and asynchronous RESET# for power-up initialization. ZQ calibration uses an external 240 Ω resistor to calibrate output driver impedance and ODT values to ±10% accuracy across voltage and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Gb (256 MB), organized as 32M words × 8 banks × 8 bits |
| Data Rate | 1333 MT/s (DDR3L-1333), 667 MHz clock frequency |
| Supply Voltage | VDD/VDDQ = 1.283 V to 1.45 V (1.35 V typical); backward compatible to 1.5 V ±0.075 V |
| CAS Latency | CL = 6, 8, 9, 10; tAA min = 13.5 ns at 667 MHz |
| CAS Write Latency | CWL = 5, 6, 7; WL = AL + CWL determines write-to-data-valid timing |
| Refresh Interval | tREFI = 7.8 µs (0°C–85°C), 3.9 µs (85°C–95°C with ASR or Manual Self-Refresh) |
| Power Consumption | IDD0 ≤ 90 mA (active precharge), IDD6 ≤ 19 mA (self-refresh at 0–85°C) |
| Package | WBGA-78 (8 mm × 10.5 mm, RoHS-compliant, lead-free) |
Pinout & Package
W632GU8KB-15 is packaged in a 78-ball WBGA (8 mm × 10.5 mm) with 0.8 mm ball pitch. Ball assignment follows JEDEC-standard DDR3L layout, supporting single-ended command/address and differential clock/strobe interfaces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CK / CK# | Differential clock input | Samples all address/control inputs at crossing point; defines timing reference for all operations |
| DQS / DQS# | Differential data strobe | Source-synchronous edge-aligned with read data, center-aligned with write data |
| RESET# | Asynchronous reset input | Initiates power-up sequence and resets internal state without clock dependency |
| ODT | On-die termination control | Enables/disables programmable termination on DQ, DM, and DQS pins during reads/writes |
| ZQ | Calibration reference terminal | Connects to external 240 Ω resistor for factory-trimmed output driver and ODT impedance calibration |
| VREFCA / VREFDQ | Reference voltage inputs | VREFCA sets command/address threshold; VREFDQ sets data I/O threshold (0.5 × VDDQ) |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic ODT (Rtt_WR) | Configurable termination impedance during writes improves signal integrity on shared DQ bus without external resistors |
| Write Leveling | Enables per-DQS delay calibration to compensate for board trace skew, ensuring setup/hold compliance at high speeds |
| Multi-Purpose Register (MPR) | Outputs predefined bit pattern for system-level timing margin testing and eye-diagram validation |
| Partial Array Self Refresh (PASR) | Reduces self-refresh current by refreshing only active banks, extending battery life in portable applications |
| Auto Self Refresh (ASR) | Automatically adjusts refresh rate based on die temperature, eliminating host software intervention above 85°C |
| Programmable Additive Latency (AL) | AL = 0, CL−1, or CL−2 optimizes command bus efficiency by decoupling command acceptance from CAS latency |
Applications
| Industrial PLC Memory Subsystem | Network Router Packet Buffer |
|---|---|
Use Scenario: Real-time deterministic control logic executing on ARM Cortex-A9 SoC with dual-channel DDR3L interface. IC Role / Device Role / Timing Role: Primary working memory delivering 1333 MT/s bandwidth with tRCD = 9 ns and tRP = 9 ns to sustain instruction/data fetch under cyclic interrupt load. Use Value: 1.35 V operation reduces system power by ~15% vs. 1.5 V DDR3, while PASR cuts self-refresh current to 19 mA during idle cycles. | Use Scenario: High-throughput packet buffering in Layer 3 enterprise router ASIC with burst-intensive traffic patterns. IC Role / Device Role / Timing Role: Dual-rank DDR3L buffer supporting concurrent read-modify-write operations across 8 internal banks with bank-interleaved access. Use Value: Dynamic ODT (Rtt_WR) maintains signal integrity during 64-byte burst writes, preventing overshoot/undershoot violations per JEDEC AC spec. |
| Medical Imaging Front-End Controller | Smart Energy Gateway |
Use Scenario: Ultrasound beamforming engine requiring low-latency, jitter-free memory access for time-critical DMA transfers. IC Role / Device Role / Timing Role: Low-jitter memory interface synchronized via DLL-aligned DQS edges, supporting write leveling for sub-nanosecond DQ-DQS alignment. Use Value: tAA = 13.5 ns and CL = 9 guarantee predictable read latency; MPR pattern validates timing margins before clinical deployment. | Use Scenario: DIN-rail mounted smart meter gateway operating continuously at 95°C ambient in utility substations. IC Role / Device Role / Timing Role: Temperature-hardened DDR3L memory using ASR mode to double refresh rate (tREFI = 3.9 µs) without firmware changes. Use Value: Industrial-grade (-40°C to 95°C) qualification and 19 mA IDD6 ensure reliable operation over 15-year field lifetime with no thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DDR3L SDRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MT41K256M8DA-125:A | Same density (2 Gb), 78-ball FBGA, but DDR3L-1600 (11-11-11) speed grade; higher tRC (48.75 ns) and IDD0 (95 mA) | Requires tighter PCB layout for 800 MHz clock; not rated for 95°C case temperature | Select when higher bandwidth is needed and thermal margin allows |
| IS43TR16256B-15HBL | 16-bit wide (x16), 2 Gb density, same DDR3L-1333 speed grade; different ballout (96-ball FBGA) and VREFDQ placement | Not pin-compatible; requires PCB redesign; supports extended voltage range (1.283–1.45 V same) | Choose only if x16 interface matches SoC bus width and layout revision is feasible |
Compared with MT41K256M8DA-125:A and IS43TR16256B-15HBL, W632GU8KB-15 offers optimal balance of industrial temperature support, 8-bit bus compatibility, and proven 95°C reliability-making it preferred for thermally constrained embedded designs where pinout stability and JEDEC compliance are mandatory.
Availability
W632GU8KB-15 is available at Aetrix Electronics and suitable for industrial automation, network infrastructure, and medical electronics requiring stable component supply, long-term lifecycle assurance, and guaranteed 0°C to 95°C operation without derating.
Supply support for W632GU8KB-15 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Winbond Electronics is a Taiwan-based semiconductor company specializing in specialty memory solutions, including NOR/NAND Flash, SRAM, and DRAM products for industrial, automotive, and communications markets.
The W632GU8KB-15 belongs to Winbond's DDR3L SDRAM product line, designed specifically for cost-sensitive, thermally demanding embedded applications where low-voltage operation, JEDEC compliance, and industrial temperature range are essential.
FAQ
What is the maximum operating frequency and corresponding CAS latency for W632GU8KB-15?
W632GU8KB-15 is rated for DDR3L-1333 operation at 667 MHz clock frequency with tCK(AVG) = 1.5–1.875 ns. Its supported CAS latencies are CL = 6, 8, 9, and 10, with tAA minimum of 13.5 ns at CL = 9. The device does not support CL = 7 or CL = 11 at this speed grade, and CWL settings are limited to 5, 6, and 7 per JEDEC specification and Winbond's datasheet Table 4.
Does W632GU8KB-15 support both 1.35 V and 1.5 V supply voltages?
Yes, W632GU8KB-15 operates at 1.35 V nominal (VDD/VDDQ = 1.283 V to 1.45 V) and is backward compatible with standard DDR3 1.5 V ±0.075 V supplies. This dual-voltage capability allows seamless migration from legacy DDR3 designs without hardware modification, though VDDQ must be externally switched between 1.35 V and 1.5 V modes per Section 11.4 of the datasheet.
How is ZQ calibration implemented on W632GU8KB-15, and what external component is required?
W632GU8KB-15 performs ZQ calibration using an external 240 Ω ±1% resistor connected between the ZQ pin and VSS. This resistor serves as the reference for trimming output driver strength and on-die termination (ODT) impedances to match system trace impedance. Calibration occurs automatically during power-up and can be re-triggered via ZQCL command, ensuring ±10% impedance accuracy across voltage and temperature variations.
What is the purpose of the Multi-Purpose Register (MPR) in W632GU8KB-15, and how is it used?
The MPR in W632GU8KB-15 outputs a fixed 128-bit pattern (0x0000000000000000FFFFFFFFFFFFFFFF) on DQ pins during read operations, enabling system-level timing margin validation and eye-diagram analysis. It is accessed by setting MR3[A1] = 1 and issuing a READ command, and is commonly used during production test and board bring-up to verify DQS-to-DQ alignment and signal integrity without requiring functional memory content.
Can W632GU8KB-15 operate reliably at 95°C case temperature, and what configuration is required?
Yes, W632GU8KB-15 is qualified for 0°C ≤ TCASE ≤ 95°C operation. At temperatures above 85°C, the device requires either Auto Self-Refresh (ASR) enabled via MR2[A6] = 1 or Manual Self-Refresh with Extended Temperature Range (MR2[A6] = 0, MR2[A7] = 1) to double the refresh rate (tREFI = 3.9 µs). This ensures data retention without host intervention and is validated per JEDEC JESD209-2 specification.
W632GU8KB-15 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- -
- Package/Case:
- 78-TFBGA
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- DRAM
- Technology:
- SDRAM - DDR3L
- Memory Size:
- 2Gbit
- Memory Organization:
- 256M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- 667 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 20 ns
- Voltage - Supply:
- 1.283V ~ 1.45V
- Operating Temperature:
- 0°C ~ 95°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 78-WBGA (10.5x8)
W632GU8KB-15 FAQ
1.How can I place an order for W632GU8KB-15 through Aetrix?
Please submit a Request for Quotation (RFQ) for W632GU8KB-15 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for W632GU8KB-15 reliable?
The price and inventory of W632GU8KB-15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W632GU8KB-15 is usually 5 days.
3.What payment methods are accepted for W632GU8KB-15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W632GU8KB-15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W632GU8KB-15?
W632GU8KB-15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W632GU8KB-15 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for W632GU8KB-15?
For technical support, including W632GU8KB-15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W632GU8KB-15 requirements.
6.How does Aetrix verify that W632GU8KB-15 is sourced from the original manufacturer or authorized distributors?
All W632GU8KB-15 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that W632GU8KB-15 meets industry standards.
7.What is the process for return or replacement of W632GU8KB-15?
All W632GU8KB-15 units undergo pre-shipment inspection (PSI). If there is an issue with W632GU8KB-15, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The W632GU8KB-15 part is unused and in its original packaging.
Return procedure for W632GU8KB-15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W632GU8KB-15 Tags
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