Winbond Electronics Corporation W631GG6KB12I

Overview

W631GG6KB12I from Winbond is a 1G-bit DDR3 SDRAM organized as 8M × 8 banks × 16 bits, supporting DDR3-1600 (11-11-11) operation at up to 800 MHz clock frequency with CAS Latency options of 6, 7, 8, 9, 10, or 11. It features on-die termination (ODT), ZQ calibration, programmable CAS Write Latency (CWL = 5–8), and industrial temperature range (−40°C to +95°C). This device serves as main memory in embedded computing, network infrastructure, and industrial control systems requiring reliable high-bandwidth data access.

For engineers reviewing the W631GG6KB12I datasheet, W631GG6KB12I pinout, W631GG6KB12I application, or W631GG6KB12I equivalent, key selection considerations include its 96-ball WBGA package, SSTL_15 interface compliance, support for dynamic ODT and write leveling, and guaranteed operation across extended industrial temperature conditions without derating.

Technical Context

This DDR3 SDRAM implements an 8-bit prefetch architecture with eight internal banks enabling concurrent row activation. Its DLL-synchronized DQS/DQ timing ensures precise source-synchronous read/write alignment, while posted CAS with additive latency (AL = 0, CL−1, CL−2) improves command bus efficiency.

It supports full JEDEC-compliant power management modes including Precharge Power Down, Active Power Down, Self-Refresh, Auto Self-Refresh (ASR), and Partial Array Self Refresh (PASR). The asynchronous RESET# pin enables deterministic initialization, and ZQ calibration maintains output driver and ODT impedance accuracy over voltage/temperature variation.

Key Specifications

Pinout & Package

W631GG6KB12I is packaged in a 96-ball Wafer-Level Ball Grid Array (WBGA) with 0.8 mm ball pitch, footprint size 9 mm × 13 mm, and thermal pad-less construction optimized for compact PCB layouts and thermal dissipation in industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT41K128M16HA-125:E and IS43TR16128B-125KBL, W631GG6KB12I uniquely combines industrial temperature rating, PASR, ASR, and full DDR3-1600 timing flexibility - making it optimal for thermally constrained, always-on embedded systems requiring both performance and power efficiency.

Availability

W631GG6KB12I is available at Aetrix Electronics and suitable for industrial automation, network infrastructure, and medical electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for W631GG6KB12I 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 serial NOR/NAND Flash, RAM, and DRAM products for industrial, automotive, and communications markets.

The W631GG6KB series belongs to Winbond's industrial-grade DDR3 SDRAM product line, designed specifically for applications demanding extended temperature operation, robust power management, and JEDEC-compliant signal integrity in space-constrained embedded systems.

FAQ

What is the maximum supported data rate for W631GG6KB12I?

W631GG6KB12I supports DDR3-1600 operation at 1600 MT/s (800 MHz clock frequency), with tAA, tRCD, and tRP timings of 11-11-11 ns. It achieves this performance while maintaining full JEDEC compliance across its industrial temperature range of −40°C to +95°C, and supports optional down-binning to DDR3-1333 or DDR3-1066 if system timing margins require relaxation.

Does W631GG6KB12I support on-die termination (ODT), and how is it configured?

Yes, W631GG6KB12I supports programmable on-die termination (ODT) on DQ, DM, and DQS/DQS# pins via MR1 and MR2 registers. It offers synchronous ODT with selectable RTT values (60 Ω, 120 Ω, 40 Ω), dynamic ODT (Rtt_WR) during writes, and asynchronous ODT mode transitions. Configuration is performed through mode register writes during initialization, with ZQ calibration ensuring impedance accuracy over voltage and temperature.

What power management features does W631GG6KB12I provide for low-power embedded systems?

W631GG6KB12I provides multiple power-saving mechanisms: Precharge and Active Power Down modes, Self-Refresh (IDD6 ≤ 14 mA), Auto Self-Refresh (ASR) with temperature-triggered refresh rate adjustment, and Partial Array Self Refresh (PASR) to refresh only active banks. These features collectively reduce active and standby power in fanless industrial controllers and portable medical devices without compromising data retention.

How is write leveling implemented on W631GG6KB12I, and why is it important?

W631GG6KB12I implements write leveling using its Multi-Purpose Register (MPR) to output a fixed training pattern, allowing the memory controller to detect DQS-to-CK skew per byte lane and adjust delay elements accordingly. This calibration is essential for reliable DDR3-1600 operation, especially in high-speed, multi-drop layouts where trace length mismatches would otherwise cause write setup/hold violations and data corruption.

Is W631GG6KB12I pin-compatible with other Winbond DDR3 SDRAMs in the same package?

W631GG6KB12I uses a standardized 96-ball WBGA footprint consistent across Winbond's W631GG6KB family (e.g., -11, -12, -15 variants), with identical ball assignment per JEDEC standard. However, speed grade differences affect AC timing parameters and supported CL/CWL combinations - so while PCB layout is reusable, firmware initialization sequences must be validated per speed bin and temperature grade.