Winbond Electronics Corporation W632GU8MB-12

Overview

W632GU8MB-12 from Winbond is a 2G-bit DDR3L SDRAM organized as 32M words × 8 banks × 8 bits, operating at 1.35V nominal supply with DDR3L-1600 (11-11-11) timing, supporting CAS Latency 5–11 and CWL 5–8, and designed for memory subsystems in industrial embedded controllers requiring low-voltage, high-density, JEDEC-compliant DRAM.

For engineers reviewing the W632GU8MB-12 datasheet, W632GU8MB-12 pinout, W632GU8MB-12 application, or W632GU8MB-12 equivalent, this page delivers verified DDR3L timing parameters, ball configuration, ODT and ZQ calibration behavior, power-down modes, and industrial temperature support (0°C to 95°C) - all confirmed from Winbond's official A02 revision datasheet.

Technical Context

This device implements an 8-bit prefetch architecture with eight internal banks, DLL-aligned DQ/DQS timing, and source-synchronous differential strobe I/O. It supports programmable additive latency (AL = 0, CL−1, CL−2), posted CAS, auto-precharge, and dynamic on-die termination (Rtt_WR) for write integrity.

Key operational features include ZQ calibration using an external 240Ω resistor, asynchronous RESET# for power-up initialization, multi-purpose register (MPR) for system-level timing calibration, and write leveling for per-DQ skew compensation - all required for stable DDR3L interface compliance at 800 MHz clock frequency (1600 MT/s).

Key Specifications

Pinout & Package

VFBGA-78 package with 8×10.5 mm² footprint, 1.0 mm profile, and ball pitch of 0.8 mm. Ball assignment follows JEDEC-standard DDR3L layout with dedicated VDD, VDDQ, VSS, VSSQ, CK/CK#, DQS/DQS#, DM, and command/address groups.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT41K128M8RH-125:E and IS43TR16128B-125KBL, the W632GU8MB-12 offers unique integration of PASR, MPR-based calibration, and flexible ODT configurations in a compact 78-ball package - making it optimal for space-constrained industrial controllers where thermal management and signal integrity are prioritized over raw bandwidth scaling.

Availability

W632GU8MB-12 is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging buffers, network edge routers, and automated test equipment requiring stable component supply with guaranteed 0°C to 95°C operation and long-term lifecycle support.

Supply support for W632GU8MB-12 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 DDR SDRAM products for industrial, automotive, and communications markets.

The W632GU8MB series belongs to Winbond's DDR3L SDRAM product line, engineered specifically for cost-sensitive, thermally demanding embedded applications requiring JEDEC-compliant low-voltage memory with extended temperature reliability and advanced calibration features.

FAQ

What is the maximum operating frequency supported by W632GU8MB-12?

The W632GU8MB-12 is rated for DDR3L-1600 operation, meaning it supports a maximum data transfer rate of 1600 MT/s with an 800 MHz differential clock input (tCK = 1.25 ns). Its fCKMAX is specified at 800 MHz under standard operating conditions, and it achieves this with CL=11 and tRCD/tRP = 13.75 ns minimum. This speed grade is validated across the full 0°C to 95°C case temperature range per JEDEC standards.

Does W632GU8MB-12 support both 1.35 V and 1.5 V supply voltages?

Yes, W632GU8MB-12 supports dual-voltage operation: it is fully compliant with DDR3L specifications at 1.35 V (VDD/VDDQ = 1.283 V to 1.45 V) and maintains backward compatibility with standard DDR3 at 1.5 V ±75 mV. The device automatically adapts its internal biasing and timing parameters based on applied VDD/VDDQ, allowing seamless migration from legacy 1.5 V systems without hardware changes.

How does the RESET# pin function in W632GU8MB-12?

The RESET# pin in W632GU8MB-12 is an asynchronous, active-low input that initiates the power-up initialization sequence and resets mode registers to default values. During power ramp, RESET# must be held low until VDD/VDDQ stabilize and CK/CK# are stable, then pulsed high for ≥500 ns to complete initialization. It also enables runtime reset of internal state without power cycling, critical for field firmware recovery in industrial control systems.

What is the purpose of the Multi-Purpose Register (MPR) in W632GU8MB-12?

The MPR in W632GU8MB-12 provides a predefined 128-bit read-only pattern used for system-level timing calibration - especially write leveling. When enabled via MR3, the DRAM outputs this fixed bit sequence on DQ pins synchronized to DQS, allowing the memory controller to measure and compensate for per-bit DQ-to-DQS skew. This feature is essential for achieving timing margin at 1600 MT/s on production PCBs with varied trace lengths.

Can W632GU8MB-12 operate reliably above 85°C?

Yes, W632GU8MB-12 is qualified for operation up to 95°C case temperature. At temperatures above 85°C, the device requires either Auto Self-Refresh (ASR) enabled via MR2[7:6] = 10b or Manual Self-Refresh mode to maintain refresh interval compliance (tREFI = 3.9 µs instead of 7.8 µs). This ensures data retention integrity without external refresh controller intervention in high-ambient environments like factory-floor automation systems.