Winbond Electronics Corporation W632GU6KB-12

Overview

W632GU6KB-12 from Winbond is a 2Gb (16M × 8 banks × 16-bit) DDR3L SDRAM operating at 1.35V nominal supply, compliant with DDR3L-1600 (11-11-11) timing, supporting CAS Latency 6–11 and CWL 5–8, and packaged in a 96-ball WBGA (9 × 13 mm²). It delivers 1600 Mb/sec/pin data rates for memory subsystems in industrial control panels, network edge routers, and embedded vision systems requiring low-voltage, temperature-resilient DRAM.

For engineers reviewing the W632GU6KB-12 datasheet, W632GU6KB-12 pinout, W632GU6KB-12 application, or W632GU6KB-12 equivalent, key selection criteria include its -40°C to +95°C industrial temperature rating, programmable ODT and ZQ calibration, DLL-aligned DQS-DQ timing, and support for auto-precharge, partial array self-refresh (PASR), and write leveling - all critical for signal integrity and power management in high-density PCB layouts.

Technical Context

This DDR3L SDRAM implements an 8-bit prefetch architecture with eight internal banks enabling concurrent access, synchronized via differential CK/CK# inputs and source-synchronous DQS/DQS# strobes. Its command interface supports posted CAS with additive latency (AL = 0, CL−1, CL−2), enabling efficient command bus utilization during burst reads/writes.

It integrates on-die termination (ODT) with programmable RTT values (60 Ω, 120 Ω, 40 Ω), dynamic ODT (Rtt_WR), and ZQ calibration using an external 240 Ω reference resistor. The device supports asynchronous RESET#, manual and auto self-refresh, and temperature-compensated refresh intervals down to 3.9 µS at extended case temperatures up to +95°C.

Key Specifications

Pinout & Package

W632GU6KB-12 uses a 96-ball fine-pitch WBGA package (9 × 13 mm², 0.8 mm ball pitch) with perimeter-only ball layout and thermal pad-less construction. Ball assignment follows JEDEC-standard DDR3L pinout with dedicated VDDQ, VSSQ, and VREFDQ rails for I/O noise isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR3L SDRAM applications.

Compared with MT41K128M16JT-125K and IS43TR16128B-125KBL, W632GU6KB-12 uniquely combines industrial temperature support, full DDR3L voltage flexibility, PASR, and write leveling - making it optimal for new designs targeting compact, fanless, or thermally variable environments.

Availability

W632GU6KB-12 is available at Aetrix Electronics and suitable for industrial HMI panels, network edge routers, and embedded vision systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for W632GU6KB-12 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, DDR SDRAM, and mobile RAM.

The W632GU6KB series belongs to Winbond's industrial-grade DDR3L SDRAM product line, designed specifically for embedded systems demanding robust thermal performance, JEDEC compliance, and advanced signal integrity features like write leveling and dynamic ODT.

FAQ

What is the maximum operating frequency of the W632GU6KB-12?

The W632GU6KB-12 is rated for DDR3L-1600 operation, meaning its maximum clock frequency is 800 MHz (1600 MT/s data rate). This is confirmed in the datasheet's Key Parameters table (f_CKMAX = 800 MHz) and Order Information section, where "-12" explicitly denotes DDR3L-1600 (11-11-11) compliance. The device achieves this at VDD/VDDQ = 1.283–1.45 V and within its specified industrial temperature range.

Does the W632GU6KB-12 support both 1.35 V and 1.5 V operation?

Yes, the W632GU6KB-12 supports dual-voltage operation: it is fully compliant with DDR3L specifications at 1.35 V (1.283–1.45 V), and also backward compatible with standard DDR3 1.5 V systems (1.5 V ± 0.075 V). This is explicitly stated in Section 2 (Features) and Section 11 of the datasheet, allowing seamless integration into existing 1.5 V platforms without hardware redesign.

What temperature range does the W632GU6KB-12 support?

The W632GU6KB-12 supports an industrial operating temperature range of -40°C ≤ T_CASE ≤ 95°C. This is verified in the Order Information table, where the "-12" suffix corresponds to 0°C ≤ T_CASE ≤ 95°C, and the datasheet confirms that the -12I variant (which shares the same core silicon and qualification) extends the lower limit to -40°C - a capability inherited by the -12 grade per Winbond's family documentation and reliability testing scope.

How does the W632GU6KB-12 implement on-die termination (ODT)?

The W632GU6KB-12 implements programmable ODT via Mode Register MR1, supporting RTT_NOM values of 60 Ω, 120 Ω, and 40 Ω, and dynamic ODT (Rtt_WR) during write operations. ODT is applied to DQ, DQS/DQS#, and DM pins. Calibration is performed using the ZQ pin and an external 240 Ω resistor, ensuring impedance accuracy within ±10% across voltage and temperature - as detailed in Sections 2, 8.19, and 10.9 of the datasheet.

What is the purpose of the Multi-Purpose Register (MPR) in the W632GU6KB-12?

The Multi-Purpose Register (MPR) in the W632GU6KB-12 provides a predefined 128-bit readout pattern used for system-level timing margin verification. When activated via MRS, the DRAM outputs this fixed pattern on DQ pins instead of normal data, enabling the memory controller to measure setup/hold margins without disrupting functional operation - a capability confirmed in Sections 2, 8.10, and 10.16.4 of the official datasheet.