Winbond Electronics Corporation W9412G6JB-5I TR

Overview

W9412G6JB-5I TR from Winbond is a 2M × 4 banks × 16-bit DDR SDRAM operating at 200 MHz (tCK = 5 ns, CL = 3), compliant with DDR400/CL3 specification and rated for -40°C to +85°C industrial temperature range. It features SSTL_2 interface, differential clock inputs (CLK/CLK̅), bi-directional DQS strobes with edge-aligned read and center-aligned write timing, and supports burst lengths of 2/4/8. Used as main memory in embedded controllers and industrial SoC platforms requiring reliable high-bandwidth data buffering.

For engineers reviewing the W9412G6JB-5I TR datasheet, W9412G6JB-5I TR pinout, W9412G6JB-5I TR application, or W9412G6JB-5I TR equivalent, key selection criteria include its industrial-grade thermal rating, 60-ball TFBGA (8×13 mm) package, 2 mA self-refresh current, programmable CAS latency (2–4), and compatibility with standard DDR400 system timing budgets.

Technical Context

This DDR SDRAM implements a 4-bank architecture with multiplexed row/column addressing (A0–A11), bank-select inputs (BA0/BA1), and command decoding via RAS̅/CAS̅/WE̅ with chip select (CS̅). It uses a DLL for input clock synchronization and supports both auto-refresh (tREFI = 64 ms) and self-refresh modes with tRFC = 50 ns minimum.

Read and write operations are synchronized to both edges of DQS; read data is edge-aligned while write data is center-aligned. Write masking is implemented via separate LDM/UDM signals controlling DQ[7:0] and DQ[15:8], respectively, with write latency fixed at 1 cycle.

Key Specifications

Pinout & Package

60-ball Thin Fine-Pitch Ball Grid Array (TFBGA) package, 8 mm × 13 mm body size, 0.8 mm ball pitch, RoHS-compliant lead-free construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT46V32M16-5B:J, W9412G6JB-5I TR delivers guaranteed operation down to -40°C and matches tRC timing, making it superior for industrial use; versus IS42S16160F-5BLI, it offers equivalent specs but distinct manufacturer qualification-both are viable for drop-in substitution where sourcing diversity is needed.

Availability

W9412G6JB-5I TR is available at Aetrix Electronics and suitable for industrial HMI controllers, 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 W9412G6JB-5I 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 microcontrollers, with over 30 years of DRAM design heritage and ISO/TS 16949-certified manufacturing.

The W9412G6JB series belongs to Winbond's industrial-grade DDR SDRAM product line, engineered specifically for embedded systems demanding extended temperature operation, low-power self-refresh, and JEDEC-compliant timing stability in resource-constrained environments.

FAQ

What is the maximum clock frequency supported by the W9412G6JB-5I TR?

The W9412G6JB-5I TR supports a maximum clock frequency of 200 MHz, corresponding to a clock cycle time (tCK) of 5 ns under DDR400/CL3 conditions. This is verified in the datasheet's KEY PARAMETERS table for the -5I speed grade at CL = 3, where tCK min = 5 ns. The device is not rated for DDR500 operation; that requires the -4 variant.

Does the W9412G6JB-5I TR support self-refresh mode, and what is its typical current draw?

Yes, the W9412G6JB-5I TR supports self-refresh mode with a maximum current draw of 2 mA, as specified in the Electrical Characteristics section (IDD6 parameter). This low current enables extended data retention during system sleep or power-loss events without external clocking, and the rating applies across the full -40°C to +85°C operating range.

What package type and ball count does the W9412G6JB-5I TR use?

The W9412G6JB-5I TR uses a 60-ball Thin Fine-Pitch Ball Grid Array (TFBGA) package measuring 8 mm × 13 mm with 0.8 mm ball pitch. This is confirmed in Section 2 (Features) and Section 13 (Package Specification) of the datasheet, and the ball configuration diagram (Section 5) explicitly labels all 60 positions including depopulated locations.

How is write masking implemented on the W9412G6JB-5I TR?

Write masking on the W9412G6JB-5I TR is implemented via two dedicated signals: LDM (Lower Data Mask) controls DQ[7:0], and UDM (Upper Data Mask) controls DQ[15:8]. As stated in Section 6 (Ball Description) and Section 8.2.16, asserting either signal high during a burst write masks the corresponding 8-bit byte, enabling precise partial-word updates without read-modify-write overhead.

Is the W9412G6JB-5I TR compatible with standard DDR memory controllers?

Yes, the W9412G6JB-5I TR is fully JEDEC-compliant DDR SDRAM and interoperable with standard DDR controllers supporting DDR400/CL3 timing. Its command set (activate, precharge, read, write, MRS, EMRS, auto-refresh), SSTL_2 interface, and timing parameters (tRCD = 15 ns, tRP = 15 ns, tRAS = 40 ns) align with JESD79 specifications, and no controller-specific initialization sequences beyond standard DDR power-up flow are required.