Winbond Electronics Corporation W632GU6MB12I

Overview

W632GU6MB12I from Winbond is a 2 Gb (16M × 8 banks × 16-bit) DDR3L SDRAM operating at 1.35 V nominal supply, compliant with DDR3L-1600 (11-11-11) timing, rated for -40°C to +95°C industrial temperature range, and packaged in a 96-ball VFBGA (7.5 × 13 mm). It delivers 1600 MT/s data rates with programmable CAS latency (CL = 5–11), supports ZQ calibration, on-die termination (ODT), and asynchronous RESET# for robust memory subsystems in embedded controllers and networking equipment.

For engineers reviewing the W632GU6MB12I datasheet, W632GU6MB12I pinout, W632GU6MB12I application, or W632GU6MB12I equivalent, key selection considerations include its DDR3L-1600 speed bin, industrial-grade thermal rating, VFBGA-96 package compatibility, ODT configuration flexibility, and support for write leveling and MPR-based system calibration-critical for high-reliability DDR3L interface design.

Technical Context

This device implements an 8-bank, 8-bit prefetch DDR3L architecture synchronized to differential CK/CK# clocks, with inputs latched at the crosspoint and I/Os source-synchronized to DQS/DQS#. It supports posted CAS with additive latency (AL = 0, CL−1, CL−2), enabling efficient command bus utilization and predictable read latency (RL = AL + CL).

It integrates dynamic ODT (Rtt_WR), programmable CWL (5–8), partial array self-refresh (PASR), auto self-refresh (ASR), and ZQ calibration using an external 240 Ω reference resistor. The asynchronous RESET# pin enables deterministic power-up initialization and runtime reset independent of clock stability.

Key Specifications

Pinout & Package

W632GU6MB12I uses a 96-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package with 0.8 mm ball pitch, designed for high-density PCB layouts and thermal reliability in industrial applications. Pin functions follow JEDEC-standard DDR3L SDRAM ball assignment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS43TR16256B-125KBL and MT41K256M16HA-125:E, W632GU6MB12I uniquely combines +95°C operation, PASR, ASR, and asynchronous RESET#-enabling simpler power management and broader environmental deployment without host firmware extensions.

Availability

W632GU6MB12I is available at Aetrix Electronics and suitable for industrial PLC controllers, network edge routers, medical imaging systems, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature extremes.

Supply support for W632GU6MB12I 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 global supplier of specialty memory and microcontrollers, serving industrial, automotive, and communications markets since 1987 with focus on reliability and JEDEC compliance.

W632GU6MB12I belongs to Winbond's W63xGU6MB DDR3L SDRAM product line, engineered for industrial and networking applications demanding extended temperature operation, low-voltage efficiency, and advanced signal integrity features like write leveling and dynamic ODT.

FAQ

What is the maximum supported CAS latency for W632GU6MB12I?

W632GU6MB12I supports programmable CAS latency values of CL = 5, 6, 7, 8, 9, 10, and 11. These settings are configured via Mode Register MR0 and must align with the selected speed bin (DDR3L-1600) and operating frequency. CL = 11 corresponds to tAA = 13.75 ns minimum, ensuring timing compliance at 800 MHz clock frequency. The device does not support CL = 13 or 14 in this speed grade.

Does W632GU6MB12I require external termination resistors?

No, W632GU6MB12I integrates programmable on-die termination (ODT) for DQ, DQS, and DM signals, eliminating the need for external parallel termination resistors. Supported ODT values include Rtt_Nom = 120 Ω, 60 Ω, and 40 Ω, and Rtt_WR = 120 Ω or 60 Ω, configurable via MR1 and MR2. ZQ calibration against a 240 Ω external reference resistor ensures ±1% impedance accuracy across voltage and temperature.

Can W632GU6MB12I operate at 1.5 V?

Yes, W632GU6MB12I is backward compatible with standard DDR3 1.5 V operation (VDD/VDDQ = 1.5 V ± 0.075 V), per JEDEC specification. However, it is optimized for DDR3L 1.35 V operation (1.283–1.45 V), delivering lower IDD currents and reduced power dissipation. When operating at 1.5 V, all AC and DC parameters remain within JEDEC-compliant limits, but ODT and driver strengths scale accordingly-no configuration changes are required.

What is the purpose of the MPR (Multi-Purpose Register) in W632GU6MB12I?

The MPR in W632GU6MB12I provides a predefined 128-bit calibration pattern readable via standard READ commands, enabling system-level timing margin analysis without disrupting normal memory operation. It supports readout of DQ/DQS timing relationships and is used during write leveling and board-level signal integrity validation. The MPR is accessed by setting MR3[A1] = 1 and issuing a READ command to address 0h.

How does W632GU6MB12I handle refresh at elevated temperatures?

At case temperatures above 85°C, W632GU6MB12I requires doubled refresh rate (tREFI = 3.9 µS instead of 7.8 µS) to maintain data retention. This is achieved either by enabling Auto Self-Refresh (ASR) via MR2[A6] = 1, or by entering Manual Self-Refresh mode with Extended Temperature Range capability (MR2[A6] = 0, MR2[A7] = 1). Both methods are fully supported and validated for operation up to +95°C.