Winbond Electronics Corporation W632GG8KB12I

Overview

W632GG8KB12I from Winbond is a 2G-bit DDR3 SDRAM organized as 32M × 8 banks × 8 bits, supporting DDR3-1600 (11-11-11) operation at 800 MHz clock frequency with CAS Latency 6–11 and programmable CWL 5–8. It features on-die termination (ODT), ZQ calibration, write leveling, and operates across -40°C to 95°C for industrial embedded systems requiring reliable memory in extended temperature environments.

For engineers reviewing the W632GG8KB12I datasheet, W632GG8KB12I pinout, W632GG8KB12I application, or W632GG8KB12I equivalent, this page delivers verified timing parameters, ball mapping, industrial-grade thermal validation, ODT configuration options, and JEDEC-compliant DDR3-1600 interoperability details critical for system-level signal integrity and power-down sequencing.

Technical Context

The W632GG8KB12I implements an 8-bit prefetch architecture with eight internal banks enabling concurrent access, and uses differential CK/CK# inputs synchronized at their crossing point for command/address latching. Its DLL aligns DQ and DQS transitions to clock edges, supporting both synchronous and dynamic ODT modes with programmable RTT values (60 Ω, 120 Ω, 40 Ω) via MR1 and MR2.

It supports posted CAS with additive latency (AL = 0, CL−1, CL−2), auto-precharge, burst lengths of 8 or chop-4, and multi-purpose register (MPR) readout for system timing calibration. Refresh is managed via standard, self-, auto-self-, and partial-array self-refresh modes, with tREFI down to 3.9 µs at 85°C < TCASE ≤ 95°C when ASR or manual self-refresh is enabled.

Key Specifications

Pinout & Package

Packaged in 78-ball WBGA (8 mm × 10.5 mm, RoHS-compliant, lead-free), with ball pitch of 0.8 mm and standard DDR3 SSTL_15 interface signaling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT41K256M8RH-125:E and IS43TR16256B-125KBL, the W632GG8KB12I uniquely combines industrial -40°C to 95°C qualification, integrated RESET#, write leveling, MPR, and full DDR3-1600 timing compliance - making it the only option among the three qualified for thermally demanding, calibration-critical embedded DDR3 implementations.

Availability

W632GG8KB12I is available at Aetrix Electronics and suitable for industrial PLC controllers, medical imaging systems, automotive ADAS ECUs, telecom baseband units, and edge AI inference accelerators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for W632GG8KB12I 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 W632GG8KB12I belongs to Winbond's industrial-grade DDR3 SDRAM product line, designed specifically for embedded systems requiring guaranteed operation from -40°C to 95°C with full JEDEC timing compliance and advanced calibration features like write leveling and MPR.

FAQ

What is the maximum clock frequency supported by the W632GG8KB12I?

The W632GG8KB12I supports a maximum clock frequency of 800 MHz, enabling DDR3-1600 operation at 1600 MT/s. This is validated across its full industrial temperature range (-40°C to 95°C) with CL=11 and tRCD/tRP/tRC timings of 11-11-11. The device does not support DDR3-1866; that speed grade applies only to the -11 variant.

Does the W632GG8KB12I support write leveling, and how is it implemented?

Yes, the W632GG8KB12I supports write leveling as defined in JEDEC JESD79-3F. It uses the DQS strobe to calibrate per-lane skew relative to CK during initialization. The DRAM asserts a fixed pattern on DQ while the controller adjusts delay taps on DQS until valid capture is achieved - a capability confirmed in Section 8.9 of the W632GG8KB datasheet revision A05.

What is the purpose of the RESET# pin on the W632GG8KB12I, and is it required?

The RESET# pin on the W632GG8KB12I provides asynchronous initialization and recovery from undefined states. It is required before issuing the first command after power stabilization and must be held low for ≥200 ns, then high for ≥500 ns before the power-up initialization sequence begins. Its presence distinguishes W632GG8KB12I from many DDR3L alternatives that omit this pin.

How does the W632GG8KB12I handle refresh at 95°C case temperature?

At TCASE > 85°C, the W632GG8KB12I requires tREFI = 3.9 µs (doubled refresh rate). This is achieved either by enabling Auto Self-Refresh (ASR) via MR2[7:6] = 10b or by entering Manual Self-Refresh with MR2[7:6] = 01b. Both methods are validated for -40°C to 95°C operation and ensure data retention without host intervention during thermal excursions.

Can the W632GG8KB12I be used as a drop-in replacement for standard DDR3-1600 components?

No - the W632GG8KB12I is not a generic drop-in replacement. While pin-compatible with JEDEC-standard 78-ball DDR3 x8 packages, its industrial temperature rating, RESET# functionality, and specific AC timing margins (e.g., tREFI = 3.9 µs at 95°C) require explicit validation in target systems. Substitution without requalification may compromise thermal reliability or initialization robustness.