Winbond Electronics Corporation W632GU8MB-09

Overview

W632GU8MB-09 from Winbond is a 2 Gb (256 MB) DDR3L SDRAM organized as 32M words × 8 banks × 8 bits, operating at 1.35 V nominal supply with DDR3L-2133 speed grade (14-14-14 CL-tRCD-tRP), supporting CAS Latency 14 and CWL 10, and designed for high-bandwidth memory subsystems in industrial computing and embedded controllers.

For engineers reviewing the W632GU8MB-09 datasheet, W632GU8MB-09 pinout, W632GU8MB-09 application, or W632GU8MB-09 equivalent, this part delivers JEDEC-compliant DDR3L timing, ZQ calibration, dynamic ODT, write leveling, and MPR-based system-level timing calibration - critical for DDR interface validation, signal integrity tuning, and thermal-stable memory design in extended-temperature platforms.

Technical Context

The W632GU8MB-09 implements an 8-bit prefetch architecture with eight internal banks enabling concurrent access, DLL-aligned DQ/DQS timing, and differential CK/CK# clocking synchronized on rising CK/falling CK#. It supports programmable additive latency (AL = 0, CL−1, CL−2) and posted CAS to decouple command issuance from data availability.

Its power management includes precharged and active power-down modes, auto/self-refresh with ASR and PASR support, and asynchronous RESET# for deterministic initialization. The device uses bi-directional differential DQS/DQS# strobes edge-aligned on reads and center-aligned on writes, with 1K-byte page size and 34 Ω output drivers calibrated via external 240 Ω ZQ resistor.

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 industrial memory modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT41K256M8DA-125:A and IS43TR16256B-125KBL, the W632GU8MB-09 uniquely delivers DDR3L-2133 performance with write leveling, MPR, and ZQ calibration in a compact 78-ball VFBGA - making it optimal for space-constrained, thermally demanding, and high-speed memory interfaces requiring precise timing calibration.

Availability

W632GU8MB-09 is available at Aetrix Electronics and suitable for industrial PLC memory buffers, medical imaging frame stores, network edge router packet buffers, automated test equipment pattern memory, and embedded controller boot memory requiring stable component supply across extended temperature ranges.

Supply support for W632GU8MB-09 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 manufacturer specializing in specialty memory solutions including NOR/NAND Flash, SRAM, and DRAM products for industrial, automotive, and communications markets.

The W632GU8MB series belongs to Winbond's DDR3L SDRAM product line, engineered for energy-efficient, thermally robust memory subsystems in industrial automation, medical devices, and network infrastructure where 1.35 V operation and extended temperature compliance are mandatory.

FAQ

What is the maximum data rate supported by the W632GU8MB-09?

The W632GU8MB-09 supports DDR3L-2133 operation at 1066 MHz clock frequency, delivering 2133 MT/s transfer rate. This is confirmed by its speed grade suffix "-09", JEDEC-compliant CL-tRCD-tRP timing of 14-14-14, and AC specifications in Section 10.15.1 of the datasheet. The device maintains full functionality across its rated temperature range (0°C to 95°C) at this speed.

Does the W632GU8MB-09 support both DDR3L and standard DDR3 voltage levels?

Yes, the W632GU8MB-09 supports dual-voltage operation: 1.35 V nominal (DDR3L) with VDD/VDDQ range 1.283 V to 1.45 V, and backward compatibility to 1.5 V ± 0.075 V (standard DDR3). Voltage switching is managed externally; the device automatically adapts timing parameters based on applied supply, as specified in Section 11 of the datasheet.

How does write leveling function in the W632GU8MB-09?

Write leveling in the W632GU8MB-09 compensates for DQS-to-CK skew by allowing the memory controller to adjust DQS delay iteratively during initialization. The device responds with a known pattern on DQ, enabling precise alignment of write strobes. This feature is mandatory for reliable 2133 MT/s operation and is detailed in Sections 8.9 and 10.16.1 of the datasheet.

What package type and ball count does the W632GU8MB-09 use?

The W632GU8MB-09 uses a VFBGA-78 package: 8 mm × 10.5 mm body size, 1.0 mm height, lead-free and RoHS-compliant. It has 78 solder balls arranged in a window-type layout optimized for signal integrity and thermal performance, as documented in Section 12 of the datasheet and confirmed by Winbond's official packaging drawings.

Can the W632GU8MB-09 operate at 105°C case temperature?

No - the W632GU8MB-09 is rated for 0°C ≤ TCASE ≤ 95°C. For 105°C operation, Winbond specifies the variant W632GU8MB09J (with "-09J" suffix), which adds extended temperature qualification, mandatory ASR or manual self-refresh mode, and doubled refresh rate (tREFI = 3.9 µs). Using W632GU8MB-09 beyond 95°C violates its qualified operating conditions.