Winbond Electronics Corporation W632GU8NB09I

Overview

W632GU8NB09I from Winbond is a 2G-bit DDR3L SDRAM organized as 32M × 8 banks × 8 bits, operating at 1.35 V nominal supply with industrial temperature support (−40°C to +95°C), compliant with DDR3L-2133 (14-14-14) timing, and packaged in a 78-ball VFBGA (8 mm × 10.5 mm). It delivers high-speed memory buffering for embedded controllers and networking SoCs requiring low-voltage, high-density DRAM with ZQ calibration and dynamic ODT.

For engineers reviewing the W632GU8NB09I datasheet, W632GU8NB09I pinout, W632GU8NB09I application, or W632GU8NB09I equivalent, key selection criteria include DDR3L-2133 speed bin compliance, industrial temperature range, VFBGA-78 package compatibility, on-die termination configuration, and CAS Write Latency (CWL) programmability per frequency.

Technical Context

This device implements an 8-bank, 8-bit prefetch DDR3L architecture synchronized to differential CK/CK# clocks and bidirectional DQS/DQS# strobes. It supports posted CAS with additive latency (AL = 0, CL−1, CL−2), programmable CWL (5–10), and multi-purpose register (MPR) readout for system-level timing calibration.

Functional features include asynchronous RESET#, ZQ calibration using external 240 Ω resistor, dynamic ODT (Rtt_WR), partial array self-refresh (PASR), and write leveling for DDR interface margin optimization. All control/address inputs latch on CK rising/CK# falling crossing points; I/Os are source-synchronous to DQS/DQS#.

Key Specifications

Pinout & Package

VFBGA-78 package with 8×10.5 mm² footprint, 1.0 mm thickness, and window-type ball layout optimized for signal integrity and thermal dissipation in space-constrained embedded designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR3L SDRAM applications.

Compared with MT41K256M8RH-125:E and IS43TR16256B-125KBL, W632GU8NB09I provides higher DDR3L-2133 bandwidth, industrial temperature support, and system-level calibration features (write leveling, MPR, PASR), making it optimal for demanding embedded applications requiring both performance and reliability.

Availability

W632GU8NB09I is available at Aetrix Electronics and suitable for networking equipment, industrial HMI controllers, medical imaging subsystems, and automotive ADAS ECUs requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for W632GU8NB09I 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 SPI NOR Flash, DDR SDRAM, and mobile RAM products.

The W632GU8NB09I belongs to Winbond's DDR3L SDRAM product line, designed specifically for industrial and networking applications demanding low-voltage operation, extended temperature reliability, and JEDEC-compliant high-speed interface features.

FAQ

What is the maximum supported clock frequency for W632GU8NB09I?

W632GU8NB09I supports DDR3L-2133 operation with a maximum clock frequency (f_CK) of 1066 MHz. This corresponds to a data transfer rate of 2133 MT/s. The device achieves this speed with CL-tRCD-tRP timing of 14-14-14 and requires stable 1.35 V supply and proper board-level signal integrity implementation.

Does W632GU8NB09I support backward compatibility with standard 1.5 V DDR3 systems?

Yes, W632GU8NB09I is backward compatible with 1.5 V DDR3 systems. It operates within VDD/VDDQ = 1.5 V ± 0.075 V (1.425 V to 1.575 V) while maintaining full DDR3L functionality. This allows seamless integration into legacy 1.5 V platforms without redesigning power delivery networks.

What package type and dimensions does W632GU8NB09I use?

W632GU8NB09I uses a 78-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package measuring 8 mm × 10.5 mm with 1.0 mm height. It follows JEDEC MO-276AA standard, features lead-free RoHS-compliant construction, and employs window-type ball layout for improved thermal and electrical performance.

How does the write leveling feature work in W632GU8NB09I?

W632GU8NB09I implements write leveling by allowing the memory controller to issue a special command that causes the DRAM to delay DQS feedback relative to CK. This enables the controller to measure and compensate for DQS-to-CK skew per byte lane - a critical calibration step for reliable operation at DDR3L-2133 speeds on complex PCBs.

What is the purpose of the Multi-Purpose Register (MPR) in W632GU8NB09I?

The Multi-Purpose Register (MPR) in W632GU8NB09I stores a predefined 128-bit calibration pattern used during system initialization. When activated, the DRAM outputs this fixed pattern on DQ pins instead of memory data, enabling the controller to perform timing margin analysis and optimize read capture without disrupting actual memory contents or access timing.