Winbond Electronics Corporation W632GG6NB12J

Overview

W632GG6NB12J from Winbond Electronics is a 2Gb (16M × 8 banks × 16-bit) DDR3 SDRAM operating at DDR3-1600 speed (800 MHz clock, 11-11-11 timing), with industrial-plus temperature range (–40°C to +105°C), VDD/VDDQ = 1.5V ±0.075V, and SSTL_15 interface. It serves as main memory in embedded computing, networking infrastructure, and industrial control systems requiring high-density, thermally robust DRAM.

For engineers reviewing the W632GG6NB12J datasheet, W632GG6NB12J pinout, W632GG6NB12J application, or W632GG6NB12J equivalent, this device supports programmable CAS latency (CL=5–11), dynamic on-die termination (Rtt_WR), ZQ calibration, write leveling, and multi-purpose register (MPR)-based timing calibration - critical for signal integrity and JEDEC-compliant DDR3 system integration.

Technical Context

This DDR3 SDRAM implements an 8-bit prefetch architecture with eight internal banks, enabling concurrent bank activation and interleaved access. Its differential CK/CK# inputs synchronize all commands, while bi-directional DQS/DQS# strobes center-align write data and edge-align read data relative to DQ signals.

The device supports asynchronous RESET#, posted CAS with additive latency (AL = 0, CL−1, CL−2), auto-precharge, and multiple power-down modes including active and precharged power-down. It also features programmable CAS write latency (CWL = 5–8), partial array self-refresh (PASR), and auto self-refresh (ASR) for extended temperature operation up to +105°C.

Key Specifications

Pinout & Package

VFBGA-96 package (7.5 mm × 13 mm, 1.0 mm height) with 0.8 mm ball pitch, RoHS-compliant and lead-free. Ball layout follows JEDEC-standard DDR3 SDRAM pin assignment for 16-bit x8-bank organization.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR3 SDRAM applications.

Compared with MT41K256M16HA-125:E and IS43TR16256B-125KBL, the W632GG6NB12J uniquely combines +105°C operation, write leveling, ZQ calibration, and MPR in a single DDR3-1600 SDRAM - delivering higher signal integrity margin and reduced system-level timing validation effort in thermally demanding applications.

Availability

W632GG6NB12J is available at Aetrix Electronics and suitable for industrial automation, network infrastructure, and medical imaging systems requiring stable component supply, long-lifecycle support, and guaranteed extended-temperature performance.

Supply support for W632GG6NB12J 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 for industrial, automotive, and communications markets.

The W632GG6NB series belongs to Winbond's industrial-grade DDR3 SDRAM product line, designed specifically for applications demanding extended temperature operation, JEDEC compliance, and robust signal integrity features like ZQ calibration and write leveling.

FAQ

What is the maximum operating temperature supported by the W632GG6NB12J?

The W632GG6NB12J is rated for a case temperature range of –40°C to +105°C. At temperatures above +95°C, JEDEC-compliant operation requires enabling Auto Self-Refresh (ASR) via MR2 bit A6 or using Manual Self-Refresh mode with Extended Temperature Range capability (MR2 A6 = 0, A7 = 1). This ensures tREFI remains ≤ 3.9 µS, preventing data retention loss. The W632GG6NB12J achieves this through process and design hardening beyond standard industrial-grade DDR3.

Does the W632GG6NB12J support write leveling, and how is it implemented?

Yes, the W632GG6NB12J supports hardware-assisted write leveling per JEDEC JESD79-3F. It is enabled by setting MR1[A8] = 1, entering write leveling mode via MRS command. In this mode, the DRAM outputs a predefined pattern on DQ while sampling DQS edges relative to CK to determine optimal delay for the memory controller's DQS-to-CK skew compensation. The W632GG6NB12J's implementation includes dedicated internal logic to generate and validate the leveling pattern without host-side firmware intervention.

What are the supported CAS latency (CL) and CAS write latency (CWL) values for W632GG6NB12J?

The W632GG6NB12J supports CAS Latency (CL) values of 5, 6, 7, 8, 9, 10, and 11, and CAS Write Latency (CWL) values of 5, 6, 7, and 8. These are programmed via Mode Registers MR0 and MR2 respectively. CL and CWL must be selected in conjunction with operating frequency: at DDR3-1600 (800 MHz), CL = 11 and CWL = 8 are typical, yielding RL = AL + CL and WL = AL + CWL, where AL is configurable as 0, CL−1, or CL−2. All combinations are validated per JEDEC AC timing tables in the datasheet.

How does ZQ calibration function on the W632GG6NB12J, and what external component is required?

ZQ calibration on the W632GG6NB12J uses an external 240 Ω ±1% precision resistor connected between the ZQ pin and VSS to calibrate both output driver strength and on-die termination (ODT) impedances. A ZQCL command initiates one-time calibration after power-up; ZQCS supports periodic recalibration during operation. The W632GG6NB12J's internal circuitry measures the ZQ reference and adjusts pull-up/pull-down transistor sizing to maintain SSTL_15-compatible drive strength and termination accuracy across voltage and temperature variations.

Is the W632GG6NB12J pin-compatible with other Winbond DDR3 SDRAMs in the same VFBGA-96 package?

Yes, the W632GG6NB12J shares identical ball mapping, power sequencing, and command protocol with other members of the W632GG6NB family (e.g., W632GG6NB12I, W632GG6NB-12) in the VFBGA-96 package. Pin functions, timing constraints, and electrical characteristics are consistent across speed grades and temperature variants, enabling drop-in replacement within the same DDR3-1600 bin and allowing shared PCB layout and firmware configuration across industrial and industrial-plus versions.