Winbond Electronics Corporation W9812G6JB-6I TR

Overview

W9812G6JB-6I TR from Winbond is a 2M × 4 banks × 16-bit synchronous DRAM (SDRAM) operating at 166 MHz with CAS Latency 3, supporting burst lengths of 1/2/4/8/full-page and auto-precharge functionality. It delivers up to 166 million words per second bandwidth and is rated for industrial temperature range (–40°C to +85°C), making it suitable for embedded control, industrial HMI, and network edge device main memory.

For engineers reviewing the W9812G6JB-6I TR datasheet, W9812G6JB-6I TR pinout, W9812G6JB-6I TR application, or W9812G6JB-6I TR equivalent, key selection criteria include its TFBGA-54 (8×8 mm) package, LVTTL interface compatibility, self-refresh capability (2 mA max), 4K refresh cycles/64 ms timing, and programmable mode register for burst/latency configuration.

Technical Context

This SDRAM implements four independent 2M-word banks with interleaved access support to hide precharge latency. Its command decoder accepts standard LVTTL-level inputs (CLK, CKE, /CS, /RAS, /CAS, /WE, BS0/BS1, A0–A11, DQ0–DQ15, LDQM/UDQM) and executes bank activate, read/write, auto-precharge, self-refresh, and power-down operations synchronized to the rising edge of CLK.

The device uses multiplexed row/column addressing with A0–A11, where A10 controls all-bank vs. bank-specific precharge, and supports both sequential and interleave burst addressing modes. Internal refresh counter ensures compliance with 64 ms refresh interval via 4,096 auto-refresh cycles, while separate VDDQ/VSSQ rails reduce I/O noise coupling.

Key Specifications

Pinout & Package

W9812G6JB-6I TR is housed in a RoHS-compliant, lead-free TFBGA-54 package (8 mm × 8 mm, 0.8 mm pitch). Ball layout follows JEDEC-standard SDRAM pinout with dedicated address, control, data, and power/ground balls.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W9812G6JB-6I TR, IS42S16160J-6BLI offers identical timing but stricter supply tolerance, while MT48LC16M16A2P-6A:J trades industrial-grade self-refresh for TSOP packaging-making W9812G6JB-6I TR optimal for new designs prioritizing low-power suspend and compact TFBGA integration.

Availability

W9812G6JB-6I TR is available at Aetrix Electronics and suitable for industrial HMI, network edge buffering, medical imaging modules, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for W9812G6JB-6I 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 company specializing in specialty memory and microcontroller solutions, with over 30 years of DRAM design heritage and ISO 9001/14001 certified manufacturing.

W9812G6JB-6I TR belongs to Winbond's W98xxG6xJ SDRAM product line, engineered for cost-sensitive, high-reliability embedded systems needing industrial-temperature operation, low-power self-refresh, and standard LVTTL interface compatibility.

FAQ

What is the exact memory capacity and organization of W9812G6JB-6I TR?

W9812G6JB-6I TR provides 128 Mbit total capacity, organized as 2,097,152 words × 4 banks × 16 bits. This structure enables efficient bank-interleaved access and supports standard SDRAM controllers targeting 16-bit data paths. The 4-bank architecture allows overlapping row activation and column access to improve effective bandwidth beyond single-bank limits.

Does W9812G6JB-6I TR support self-refresh mode, and what is its typical current draw?

Yes, W9812G6JB-6I TR supports self-refresh mode with a maximum current draw of 2 mA at industrial temperature (–40°C to +85°C). This low-current self-refresh capability allows the device to retain data during system suspend states without external refresh control, making it suitable for battery-backed or energy-harvesting applications where power conservation is critical.

What package type and ball count does W9812G6JB-6I TR use?

W9812G6JB-6I TR uses a RoHS-compliant, lead-free TFBGA-54 package measuring 8 mm × 8 mm with 0.8 mm ball pitch. The 54-ball layout includes dedicated address, control, data, and split power/ground balls (VDD/VSS for core, VDDQ/VSSQ for I/O), ensuring signal integrity and thermal performance in space-constrained industrial PCBs.

What are the supported burst lengths and CAS latency settings for W9812G6JB-6I TR?

W9812G6JB-6I TR supports burst lengths of 1, 2, 4, 8, and full-page, all configurable via its programmable mode register. CAS latency is fixed at CL = 3 for the -6I speed grade, guaranteeing consistent 3-cycle read-to-data-valid timing at 166 MHz operation-enabling predictable memory controller timing closure in deterministic real-time systems.

How does the auto-precharge function operate in W9812G6JB-6I TR?

In W9812G6JB-6I TR, auto-precharge is triggered by asserting A10 high during a read or write command. For reads, precharge begins before burst completion; for writes, it starts two clocks after the final burst write cycle (tWR delay). This eliminates manual precharge commands, reducing memory controller overhead and improving bandwidth utilization in burst-heavy workloads.