Winbond Electronics Corporation W632GU6MB12J

Overview

W632GU6MB12J from Winbond is a 2Gb (16M × 8 banks × 16-bit) DDR3L SDRAM operating at 1.35V nominal supply, compliant with DDR3L-1600 (11-11-11) timing, rated for -40°C to +105°C industrial-plus temperature range, and packaged in a 96-ball VFBGA (7.5 × 13 mm). It delivers high-bandwidth memory for embedded controllers, networking processors, and industrial SoC platforms requiring extended thermal reliability.

For engineers reviewing the W632GU6MB12J datasheet, W632GU6MB12J pinout, W632GU6MB12J application, or W632GU6MB12J equivalent, key selection criteria include its 1.35V operation with 1.5V backward compatibility, programmable CAS Write Latency (CWL = 5–8), on-die termination (ODT) with dynamic Rtt_WR support, and ZQ calibration for output driver and ODT impedance tuning.

Technical Context

This DDR3L SDRAM implements an 8-bit prefetch architecture with eight internal banks, enabling concurrent access and efficient bank interleaving. It supports posted CAS with additive latency (AL = 0, CL−1, CL−2), enabling higher command bus utilization and reduced command collision under burst-heavy workloads.

The device integrates asynchronous RESET# for power-up initialization and reset recovery, DLL-aligned DQ/DQS timing for precise data capture, and dual-mode ODT (synchronous and dynamic) with programmable RTT values (Rtt_Nom, Rtt_WR) for optimized signal integrity during reads and writes across varying trace lengths and topologies.

Key Specifications

Pinout & Package

VFBGA-96 package with 7.5 mm × 13 mm footprint, 0.8 mm ball pitch, and 1.0 mm maximum thickness. Ball assignment follows JEDEC-standard DDR3L layout with dedicated VDD/VSS pairs per I/O group, differential CK/CK# and DQS/DQS# pairs, and dedicated RESET# and ZQ pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT41K128M16JT-125K, W632GU6MB12J offers native 1.35 V operation and guaranteed ASR support up to 105°C - critical for thermally constrained embedded systems. Against IS43TR16128B-125KBL, it shares pinout and core features but differs in MR register defaults and ZQ calibration behavior, requiring firmware validation during qualification.

Availability

W632GU6MB12J is available at Aetrix Electronics and suitable for industrial HMI controllers, network packet processors, medical imaging subsystems, and automotive ADAS domain controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for W632GU6MB12J 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 LPDRAM for industrial, automotive, and communications markets.

The W632GU6MB series belongs to Winbond's industrial-grade DDR3L SDRAM product line, designed specifically for embedded systems demanding extended temperature operation, low-voltage efficiency, and JEDEC-compliant reliability in harsh environments.

FAQ

What is the maximum operating frequency and corresponding timing specification for W632GU6MB12J?

W632GU6MB12J is rated for DDR3L-1600 operation at 800 MHz clock frequency, with JEDEC-compliant timing of CL-nRCD-nRP = 11-11-11. Its tAA (access time from clock) is guaranteed at ≤13.75 ns, and tRCD/tRP minimums are 13.75 ns each. These parameters are validated across the full -40°C to +105°C operating range when used with appropriate VDD/VDDQ (1.283–1.45 V) and enabled ASR mode above 95°C.

Does W632GU6MB12J support both 1.35 V and 1.5 V supply voltages?

Yes, W632GU6MB12J supports native 1.35 V DDR3L operation (VDD/VDDQ = 1.283–1.45 V) and is fully backward compatible with 1.5 V DDR3 systems (VDD/VDDQ = 1.425–1.575 V). This dual-voltage capability allows seamless integration into legacy 1.5 V designs or new energy-efficient platforms without hardware modification - provided the host controller supports both voltage modes and proper mode register configuration.

How does W632GU6MB12J handle refresh requirements at 105°C case temperature?

At T_CASE > 95°C, W632GU6MB12J requires either Auto Self-Refresh (ASR) mode (MR2[7:6] = 10b or 11b) or Manual Self-Refresh mode (MR2[7:6] = 01b) to maintain tREFI = 3.9 µS - doubling the standard 7.8 µS refresh rate. This ensures reliable data retention without external refresh command intervention, a mandatory requirement for continuous operation in sealed, high-temperature enclosures.

What is the function of the ZQ pin on W632GU6MB12J, and what external component is required?

The ZQ pin on W632GU6MB12J connects to a single external 240 Ω ±1% precision resistor to ground, enabling factory-trimmed calibration of output driver strength and on-die termination (ODT) resistance. This calibration compensates for process, voltage, and temperature variations, ensuring consistent 34 Ω (nominal) drive impedance and matched Rtt values (e.g., 120 Ω, 60 Ω) across operating conditions - critical for signal integrity in high-speed DDR interfaces.

Is W632GU6MB12J pin-compatible with other DDR3L SDRAMs in the same VFBGA-96 package?

W632GU6MB12J follows JEDEC-standard DDR3L ballout for VFBGA-96 packages, making it mechanically compatible with industry-standard footprints. However, pin mapping differs from Micron and Samsung equivalents in control signal placement (e.g., CKE location, ODT routing), so direct PCB-level substitution requires verification against the specific ball assignment table in Section 5 ("Ball Configuration") of the Winbond datasheet - not generic JEDEC diagrams.