Winbond Electronics Corporation W9825G6JH-6I

Overview

W9825G6JH-6I from Winbond Electronics is a 4M × 4 banks × 16-bit synchronous DRAM (SDRAM) operating at 166 MHz with CAS Latency 3, 3.3V supply, and industrial temperature range (−40°C to +85°C). It supports burst lengths of 1/2/4/8/full page, auto-precharge, and self-refresh - deployed as main memory in embedded controllers, industrial HMIs, and legacy PC-compatible systems.

For engineers reviewing the W9825G6JH-6I datasheet, W9825G6JH-6I pinout, W9825G6JH-6I application, or W9825G6JH-6I equivalent, key selection criteria include industrial-grade thermal reliability, TSOP II 54-pin compatibility, LVTTL interface timing compliance, and burst-mode memory bandwidth matching for real-time data buffering in deterministic systems.

Technical Context

The W9825G6JH-6I implements a fully synchronous architecture synchronized to the rising edge of CLK, with command decoding governed by CS, RAS, CAS, and WE. Its four independent banks enable interleaved access to hide precharge latency (tRP = 20 ns min), while the programmable Mode Register configures burst type (sequential/interleave), length, and CAS latency.

It supports multiple low-power states: Power Down mode (CKE-driven, no refresh), Self Refresh (internal oscillator maintains refresh, CKE low), and Clock Suspend (active bank freeze). Data integrity is maintained via separate VDDQ/VSSQ I/O power domains and LDQM/UDQM per-byte masking - critical for mixed-signal system integration where noise immunity is non-negotiable.

Key Specifications

Pinout & Package

W9825G6JH-6I is housed in a 54-pin TSOP II (400 mil) package with 0.80 mm pitch, RoHS-compliant lead-free finish. Pin layout follows JEDEC standard for 16-bit SDRAM, with dedicated DQ[0:15], address (A0–A12), bank select (BS0/BS1), and control signals (CS, RAS, CAS, WE, CKE, CLK).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS42S16400J-6BLI and MT48LC4M16A2P-6A:G, the W9825G6JH-6I offers identical industrial temperature support and TSOP II mechanical fit, but provides broader VDD tolerance (±0.3V) and shorter tRC - easing power design and improving worst-case timing margin in thermally stressed systems.

Availability

W9825G6JH-6I is available at Aetrix Electronics and suitable for industrial HMIs, legacy PC embedded controllers, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for W9825G6JH-6I 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 SPI NOR Flash, PSRAM, and SDR/DDR SDRAM for industrial and embedded markets.

The W9825G6JH series targets cost-sensitive, thermally demanding applications where JEDEC-compliant SDRAM functionality is needed without DDR complexity - emphasizing reliability, long-term availability, and drop-in compatibility with legacy designs.

FAQ

What is the maximum clock frequency supported by the W9825G6JH-6I?

The W9825G6JH-6I is rated for a maximum clock frequency of 166 MHz, compliant with the 166 MHz/CL3 specification. This speed is guaranteed across its full industrial temperature range (−40°C to +85°C), and timing parameters such as tAC (access time), tRC (row cycle time), and tRCD (RAS-to-CAS delay) are specified at this frequency. The -6I suffix explicitly denotes industrial qualification, distinguishing it from commercial-grade variants like the -6 or -5.

Does the W9825G6JH-6I support auto-precharge, and how is it enabled?

Yes, the W9825G6JH-6I supports auto-precharge on both read and write commands. It is enabled by asserting A10 HIGH during the issuance of a READ or WRITE command. When activated, the SDRAM automatically initiates precharge of the accessed bank before the burst completes - eliminating the need for a separate PRECHARGE command. This feature reduces command overhead and simplifies controller firmware, especially in burst-intensive applications like frame buffering.

What package type and pin count does the W9825G6JH-6I use?

The W9825G6JH-6I uses a 54-pin TSOP II (Thin Small Outline Package, Type II) with 400-mil body width and 0.80 mm lead pitch. This JEDEC-standard package features gull-wing leads and is RoHS-compliant with lead-free terminations. Its pinout matches industry-standard 16-bit SDRAMs, enabling direct PCB footprint compatibility with alternatives such as the IS42S16400J-6BLI.

How does the W9825G6JH-6I handle power management in low-power modes?

The W9825G6JH-6I supports three distinct low-power states: Power Down (CKE low, clocks gated, no refresh), Clock Suspend (CKE low while bank active, clocks halted mid-operation), and Self Refresh (CKE low, internal oscillator sustains 8K refresh cycles/64 ms). In Self Refresh, the device maintains data integrity autonomously - critical for battery-powered or host-sleep scenarios. Exit from any mode requires defined stabilization delays (e.g., tXSR after Self Refresh exit) before valid commands may be issued.

What is the memory organization and total density of the W9825G6JH-6I?

The W9825G6JH-6I is organized as 4,194,304 words × 4 banks × 16 bits, resulting in a total density of 128 Mbit (16 MByte). Each bank contains 1,048,576 words (1 MWord), and rows are 512 columns deep. This structure supports efficient page-mode access and bank interleaving - allowing concurrent row activation across banks to hide precharge latency and sustain high effective bandwidth in streaming workloads.