Winbond Electronics Corporation W632GG6MB12J

Overview

W632GG6MB12J from Winbond is a 2G-bit DDR3 SDRAM organized as 16M × 8 banks × 16 bits, supporting DDR3-1600 (11-11-11) operation at up to 800 MHz clock frequency with CAS Latency 5–11 and programmable CAS Write Latency 5–8. It features on-die termination (ODT), ZQ calibration, asynchronous RESET#, and operates across -40°C to +105°C for industrial-plus applications such as network edge routers and ruggedized embedded controllers.

For engineers reviewing the W632GG6MB12J datasheet, W632GG6MB12J pinout, W632GG6MB12J application, or W632GG6MB12J equivalent, key selection considerations include its VFBGA-96 package, SSTL_15 interface compliance, 105°C extended temperature rating, and support for dynamic ODT, write leveling, and multi-purpose register (MPR)-based timing calibration.

Technical Context

This DDR3 SDRAM implements an 8-bit prefetch architecture with eight internal banks enabling concurrent memory access. Its differential CK/CK# and DQS/DQS# interfaces enforce source-synchronous timing, while DLL alignment ensures precise DQ-DQS-to-clock phase control for reliable high-speed transfers.

Command decoding occurs on every rising edge of CK, with data and DM referenced to both edges of DQS/DQS#. The device supports posted CAS with additive latency (AL = 0, CL−1, CL−2), auto-precharge, burst lengths of 8 or 4, and programmable read burst ordering (interleaved or nibble-sequential).

Key Specifications

Pinout & Package

VFBGA-96 package (7.5 mm × 13 mm, 1.0 mm thickness) with ball pitch of 0.8 mm. Ball layout follows JEDEC-standard DDR3 SDRAM pinout for 16-bit data width and 14-bit address/command bus.

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, W632GG6MB12J uniquely combines 105°C operation, full JEDEC DDR3-1600 compliance, MPR-based calibration, and write leveling-making it optimal for thermally constrained, high-reliability embedded designs requiring minimal host-side timing tuning.

Availability

W632GG6MB12J is available at Aetrix Electronics and suitable for industrial edge gateways, telecom baseband units, ruggedized medical imaging controllers, avionics data acquisition modules, and network infrastructure equipment requiring stable component supply across extended temperature ranges.

Supply support for W632GG6MB12J 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 manufacturer specializing in specialty memory solutions including NOR/NAND Flash, SRAM, and DRAM products for industrial, automotive, and communications markets.

W632GG6MB12J belongs to Winbond's industrial-grade DDR3 SDRAM product line, designed specifically for high-reliability embedded systems demanding extended temperature operation, robust power management, and JEDEC-compliant signal integrity features.

FAQ

What is the maximum operating temperature specification for W632GG6MB12J?

W632GG6MB12J is rated for operation from -40°C to +105°C case temperature. At 105°C, Auto Self-Refresh (ASR) must be enabled via MR2 A6=1b to maintain data retention, as standard self-refresh intervals double to 3.9 µS. This requirement is explicitly defined in the datasheet's KEY PARAMETERS section and applies only to the "J" suffix variants like W632GG6MB12J.

Does W632GG6MB12J support write leveling, and how is it implemented?

Yes, W632GG6MB12J supports write leveling as a mandatory initialization step. It uses the DQS strobe to calibrate skew between the memory controller's DQS output and the DRAM's internal clock domain. The procedure is defined in Section 8.9 of the datasheet and requires the DRAM to respond with a fixed MPR pattern while the controller adjusts delay taps-enabling precise timing closure on high-speed write paths.

What are the supported CAS Latency and CAS Write Latency values for W632GG6MB12J?

W632GG6MB12J 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 confirmed in the KEY PARAMETERS table (page 7) and correspond to its DDR3-1600 (11-11-11) speed bin. CL and CWL are programmed independently via mode registers MR0 and MR2, respectively.

Is W632GG6MB12J pin-compatible with other Winbond DDR3 SDRAMs in the same family?

W632GG6MB12J uses the standard JEDEC DDR3 96-ball VFBGA package with identical ball map to other W632GG6MB variants (e.g., W632GG6MB12I, W632GG6MB-12). Pin compatibility is maintained across speed grades and temperature suffixes within the W632GG6MB family, allowing drop-in replacement for same-density, same-interface designs-provided voltage and timing constraints are met.

What is the purpose of the ZQ pin on W632GG6MB12J, and what external component is required?

The ZQ pin on W632GG6MB12J connects to an external 240 Ω ±1% precision resistor to ground, enabling periodic calibration of output driver strength and on-die termination (ODT) impedances. This calibration compensates for process, voltage, and temperature variations, ensuring consistent signal integrity. The ZQ calibration command (ZQCL or ZQCS) must be issued after power-up and periodically during operation per JEDEC requirements.