Winbond Electronics Corporation W632GU6MB11J

Overview

W632GU6MB11J from Winbond is a 2G-bit DDR3L SDRAM organized as 16M × 8 banks × 16 bits, operating at 1.35 V nominal supply with industrial-plus temperature range (–40°C to +105°C), compliant with DDR3L-1866 (13-13-13) timing, and delivering up to 1866 MT/s data rates for memory subsystems in networking edge devices, industrial HMIs, and automotive infotainment head units.

For engineers reviewing the W632GU6MB11J datasheet, W632GU6MB11J pinout, W632GU6MB11J application, or W632GU6MB11J equivalent, key selection considerations include its VFBGA-96 package, programmable CAS latency (CL = 5–13), dynamic on-die termination (Rtt_WR), ZQ calibration support, and industrial-plus thermal rating enabling reliable operation in extended-temperature embedded systems.

Technical Context

This DDR3L SDRAM implements an 8-bit prefetch architecture with eight internal banks for concurrent access, differential CK/CK# clocking synchronized at the crosspoint, and bi-directional DQS/DQS# strobes edge-aligned on reads and center-aligned on writes. It supports posted CAS with additive latency (AL = 0, CL−1, CL−2) and programmable CAS write latency (CWL = 5–9) to optimize command bus efficiency and write timing.

The device integrates asynchronous RESET# for power-up initialization, multi-purpose register (MPR) for system-level timing calibration, write leveling for DQ-DQS skew compensation, and dual-mode ODT (synchronous and dynamic) with configurable Rtt_NOM and Rtt_WR impedances. Its ZQ calibration uses an external 240 Ω resistor to calibrate output drivers and ODT networks across voltage and temperature.

Key Specifications

Pinout & Package

VFBGA-96 package with 7.5 mm × 13 mm footprint, 0.8 mm ball pitch, and standard DDR3L ball assignment per JEDEC JESD79-3F. Ball layout optimized for signal integrity in high-speed memory interfaces with dedicated VDD/VSS pairs, split VDDQ/VSSQ for I/O domain isolation, and differential clock/strobe routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT41K256M16HA-125:A and IS43TR16256B-125KBL, W632GU6MB11J uniquely combines industrial-plus temperature support with ASR, MPR, and write leveling-enabling robust, self-calibrating memory subsystems in thermally demanding embedded platforms without host firmware overhead.

Availability

W632GU6MB11J is available at Aetrix Electronics and suitable for industrial HMI panels, automotive infotainment systems, and networking edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for W632GU6MB11J 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 W632GU6MB series belongs to Winbond's industrial-grade DDR3L SDRAM product line, designed specifically for embedded systems requiring extended temperature operation, low-voltage efficiency, and JEDEC-compliant reliability in space-constrained, thermally aggressive environments.

FAQ

What is the maximum operating frequency supported by W632GU6MB11J?

W632GU6MB11J supports DDR3L-1866 operation at 933 MHz clock frequency (1866 MT/s data rate), with tRCD/tRP/tRC minimums of 13.91 ns each. It achieves this performance within its specified industrial-plus temperature range (–40°C to +105°C) and 1.283–1.45 V supply window. The device maintains full JEDEC AC/DC compliance across this range when configured with CL=13 and CWL=9.

Does W632GU6MB11J support backward compatibility with standard 1.5 V DDR3 systems?

Yes, W632GU6MB11J is fully backward compatible with 1.5 V DDR3 systems. It operates with VDD/VDDQ = 1.5 V ± 75 mV and retains all DDR3L functional features-including DLL, ODT, and ZQ calibration-at 1.5 V. This allows seamless drop-in replacement in legacy 1.5 V designs while retaining the option to migrate to 1.35 V for lower power consumption.

How does the ASR (Auto Self-Refresh) feature function in W632GU6MB11J at 105°C?

At TCASE > 95°C, W632GU6MB11J requires tREFI = 3.9 µS (doubled refresh rate). When ASR is enabled (MR2[A6]=1), the device automatically switches to this accelerated refresh interval without host intervention. This eliminates the need for external thermal monitoring and refresh rate reprogramming, simplifying firmware design for automotive and industrial applications operating continuously at 105°C.

What is the purpose of the Multi-Purpose Register (MPR) in W632GU6MB11J?

The MPR in W632GU6MB11J outputs a fixed 128-bit pattern (0x0000000000000000FFFFFFFFFFFFFFFF) on DQ pins during MPR read mode. This known pattern enables system-level timing margin testing-such as eye diagram analysis and setup/hold validation-without corrupting user data or requiring memory initialization, making it essential for high-reliability DDR3L validation.

Can W632GU6MB11J be used in designs requiring write leveling calibration?

Yes, W632GU6MB11J fully supports write leveling as defined in JEDEC DDR3L standards. The DRAM internally adjusts DQS timing relative to CK during write leveling mode, allowing the memory controller to determine optimal DQS launch delay. This capability is critical for achieving timing closure on high-speed PCBs with significant DQ-DQS skew, especially in dense industrial and automotive layouts.