Winbond Electronics Corporation W9425G6KH-5 TR

Overview

W9425G6KH-5 TR from Winbond is a 4 M × 4 banks × 16-bit DDR SDRAM operating at 200 MHz with 2.5 V ±0.2 V supply, CAS latency options of 2/2.5/3, and SSTL_2 interface - designed for main memory in embedded computing and industrial control systems requiring DDR400/CL3 compliance.

For engineers reviewing the W9425G6KH-5 TR datasheet, W9425G6KH-5 TR pinout, W9425G6KH-5 TR application, or W9425G6KH-5 TR equivalent, this page delivers verified timing parameters (tCK = 5–12 ns), power specs (IDD6 ≤ 2 mA self-refresh), bank architecture (4 banks), burst configurations (BL=2/4/8), and TSOP II 66-pin package details to support memory subsystem validation and BOM selection.

Technical Context

This DDR SDRAM implements double-data-rate architecture synchronized to both edges of DQS, with differential CLK/CLK inputs and DLL-based timing alignment. It supports programmable mode registers for burst length, CAS latency, and addressing mode, enabling optimization across read/write throughput and latency trade-offs.

Functional operation includes bank-selective and all-bank precharge, auto-refresh (7.8 µs interval, max 8 cycles), self-refresh (2 mA), and power-down modes (precharged/active). Command decoding uses CS, RAS, CAS, WE with A0–A12 multiplexed row/column addressing and BA0/BA1 bank selection.

Key Specifications

Pinout & Package

W9425G6KH-5 TR is housed in a RoHS-compliant, lead-free TSOP II 66-pin package (13.1 mm × 20.0 mm × 1.2 mm height), with dedicated VDD/VSS and isolated VDDQ/VSSQ rails for logic and I/O noise separation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W9425G6KH-5 TR, MT46V32M16-5B:J offers marginally faster refresh cycle but lacks CL=2 option, while IS42S16160F-5TL provides full pin-and-timing compatibility with dual sourcing benefits - making it the lowest-risk alternative for continuity planning.

Availability

W9425G6KH-5 TR is available at Aetrix Electronics and suitable for industrial HMI panels, network edge routers, medical imaging controllers, and automated test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for W9425G6KH-5 TR 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 memory ICs, flash storage, and security solutions, with global distribution and industrial-grade qualification programs.

The W9425G6KH-5 TR belongs to Winbond's DDR SDRAM product line, engineered for cost-sensitive, high-reliability embedded systems needing DDR400 performance with industrial temperature support and RoHS-compliant packaging.

FAQ

What is the maximum operating frequency and corresponding data rate of the W9425G6KH-5 TR?

The W9425G6KH-5 TR operates at a maximum clock frequency of 200 MHz, achieving a data transfer rate of 400 MT/s (mega-transfers per second) due to its double-data-rate architecture. This matches the DDR400 specification and is validated under CL=3 timing at 2.5 V ±0.2 V supply. The device supports tCK as low as 5 ns only at CL=3; CL=2 requires minimum 7.5 ns tCK.

Does the W9425G6KH-5 TR support multiple CAS latency settings, and how are they configured?

Yes, the W9425G6KH-5 TR supports CAS latency settings of 2, 2.5, and 3, programmed via bits A6–A4 in the Mode Register during initialization. These values are set using the Mode Register Set (MRS) command after power-up and DLL stabilization. CL selection directly affects read access timing and must be consistent with system controller capabilities and board-level timing margins.

What package type and pin count does the W9425G6KH-5 TR use, and is it RoHS compliant?

The W9425G6KH-5 TR uses a TSOP II (Thin Small Outline Package, Type II) with 66 pins, measuring 13.1 mm × 20.0 mm × 1.2 mm. It is manufactured with lead-free materials and fully complies with RoHS Directive 2011/65/EU. Pin assignments include dedicated VDDQ/VSSQ rails for I/O noise isolation and differential CLK/CLK inputs for precise DDR timing.

How does the W9425G6KH-5 TR handle refresh operations, and what is the required refresh interval?

The W9425G6KH-5 TR requires an average refresh interval of 7.8 µs (based on 8K rows over 64 ms), implemented via Auto Refresh commands issued by the memory controller. Up to eight Auto Refresh commands may be queued, with no more than 8 × tREFI between successive commands. Self-refresh mode draws ≤2 mA and maintains data without external clocking, entered via CKE-low command sequence.

Can the W9425G6KH-5 TR be used in systems requiring industrial temperature operation?

The W9425G6KH-5 TR is rated for 0°C to 70°C operation. For industrial temperature range (-40°C to +85°C), Winbond specifies the W9425G6KH-5I variant - identical in functionality and pinout but qualified across the extended range. Using W9425G6KH-5 TR outside its specified temperature range may result in timing violations or data retention failure and is not recommended.