Winbond Electronics Corporation W9751G8KB25I

Overview

W9751G8KB25I from Winbond Electronics is a 512M-bit DDR2 SDRAM organized as 16M words × 4 banks × 8 bits, operating at DDR2-800 speed (5-5-5 or 6-6-6 timing), with 1.8 V ±0.1 V supply, industrial temperature range (−40°C to +95°C), and WBGA-60 package. It serves as main memory in embedded controllers, network processors, and industrial HMIs requiring reliable high-bandwidth data buffering.

For engineers reviewing the W9751G8KB25I datasheet, W9751G8KB25I pinout, W9751G8KB25I application, or W9751G8KB25I equivalent, key selection criteria include CAS latency support (CL=3–7), on-die termination (ODT) programmability, OCD impedance calibration, differential clock interface (CLK/CLK), and industrial-grade thermal stability.

Technical Context

This DDR2 SDRAM implements a double-data-rate architecture synchronized to differential CLK/CLK inputs, with bi-directional DQS/DQS strobes edge-aligned for reads and center-aligned for writes. Its DLL aligns DQ and DQS transitions to clock edges, enabling stable 400 MHz operation (200 MHz clock, 800 MT/s).

It supports programmable additive latency (AL=0–2), auto-precharge, burst lengths of 4 or 8, and on-die termination controlled via ODT pin and EMR(1). Power management includes precharged power down, self-refresh (IDD6 ≤ 6 mA), and burst refresh (IDD5B ≤ 80 mA).

Key Specifications

Pinout & Package

W9751G8KB25I uses a 60-ball WBGA package (8 mm × 12.5 mm) with lead-free, RoHS-compliant construction. Ball pitch is 0.8 mm, and balls are arranged in an 8×8 grid with corner omissions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR2 SDRAM applications.

Compared with MT47H64M4HQ-25E and IS42S16400F-25BLI, W9751G8KB25I offers higher 512 Mbit density in an 8-bit configuration, making it optimal for space-constrained designs needing maximum storage per byte-lane while retaining industrial thermal robustness.

Availability

W9751G8KB25I is available at Aetrix Electronics and suitable for industrial HMIs, network edge routers, medical imaging subsystems, and automated test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for W9751G8KB25I 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 DRAM products for industrial, automotive, and communications markets.

The W9751G8KB series belongs to Winbond's industrial-grade DDR2 SDRAM product line, designed specifically for embedded systems demanding extended temperature operation, low-power self-refresh, and robust signal integrity in electrically noisy environments.

FAQ

What is the maximum data rate supported by W9751G8KB25I?

W9751G8KB25I supports DDR2-800 operation at 800 MT/s (400 MHz clock frequency), compliant with both 5-5-5 and 6-6-6 timing specifications. This delivers a peak bandwidth of 6.4 GB/s across its 8-bit data bus. The device achieves this using differential CLK/CLK inputs and DLL-aligned DQS strobes to maintain timing margins under industrial temperature variation.

Does W9751G8KB25I support on-die termination (ODT)?

Yes, W9751G8KB25I supports programmable on-die termination (ODT) controlled via the ODT pin and extended mode register EMR(1). When ODT is asserted HIGH, internal termination resistors are enabled on DQ and DQS lines to suppress signal reflections. This eliminates the need for external termination resistors and simplifies PCB layout for high-speed DDR2 interfaces.

What is the operating temperature range for W9751G8KB25I?

W9751G8KB25I is rated for industrial operation from −40°C to +95°C case temperature (TCASE). This specification is explicitly confirmed in the order information table for the "25I" speed grade suffix and validated across all AC/DC electrical characteristics in the datasheet, making it suitable for deployment in unheated enclosures, outdoor kiosks, and factory-floor equipment.

How many banks and what organization does W9751G8KB25I use?

W9751G8KB25I is organized as 16,777,216 words × 4 banks × 8 bits, totaling 512 Mbits. It contains four independent memory banks (Bank 0–3), each selectable via BA0/BA1, enabling interleaved access to improve effective bandwidth and hide row activation latency during sequential operations.

Can W9751G8KB25I be used with a single-ended clock instead of differential CLK/CLK?

No, W9751G8KB25I requires differential clock inputs (CLK and CLK) as specified in the general description and functional sections. All address and control signals are latched at the crossing of CLK rising and CLK falling edges. Using a single-ended clock violates the device's timing architecture and will result in undefined behavior or initialization failure.