Winbond Electronics Corporation W66BM6NBUAGJ TR

Overview

W66BM6NBUAGJ TR from Winbond is a 2Gb LPDDR4X mobile SDRAM in 200-ball WFBGA package, operating at 4266 Mbps data rate with 1.1 V I/O and 0.6 V core supply, supporting dual-channel 16-bit x2 configuration for smartphone application processors.

For engineers reviewing the W66BM6NBUAGJ TR datasheet, W66BM6NBUAGJ TR pinout, W66BM6NBUAGJ TR application, or W66BM6NBUAGJ TR equivalent, this page delivers verified LPDDR4X timing parameters, ball assignment mapping, mode register definitions, VREF training support, and thermal-aware refresh features critical for high-speed memory subsystem design.

Technical Context

This device implements LPDDR4X JEDEC JESD209-4B compliance with dual-die-package (DDP) architecture support, 8-bank organization, and programmable burst lengths (BL16/BL32). It integrates on-die termination (ODT) for both command/address and DQ/DQS buses, plus CA and DQ VREF training for signal integrity at 2133 MHz clock frequency.

Power management includes deep power-down, self-refresh with temperature-compensated refresh (TRR), and dynamic voltage scaling between 1.1 V I/O and 0.6 V core. Command bus training, write leveling, and RD DQ calibration are supported via Multi-Purpose Command (MPC) and mode register access.

Key Specifications

Pinout & Package

W66BM6NBUAGJ TR uses a 200-ball WFBGA (Wafer-Level Fine-Pitch Ball Grid Array) package with 0.65 mm pitch, 10 mm × 12 mm body size, and standard LPDDR4X ball assignment per Section 4.1 of the datasheet (Single-Die-Package layout).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LPDDR4X memory applications.

Compared with W66BM6NBUAGJ TR, MT53E256M32D2DS-053 WT:A offers broader automotive qualification but requires layout changes and loses TRR-based power savings, while K4U6E3046M-BCGC matches pinout but omits advanced calibration features needed for high-margin mobile designs.

Availability

W66BM6NBUAGJ TR is available at Aetrix Electronics and suitable for smartphone application processor memory, tablet SoC main memory, and automotive infotainment systems requiring stable component supply and long-lifecycle support.

Supply support for W66BM6NBUAGJ 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 solutions including SPI NOR Flash, RAM, and mobile DRAM for consumer, industrial, and automotive markets.

The W66B series targets high-performance, low-power mobile platforms, delivering JEDEC-compliant LPDDR4X functionality with enhanced thermal management and calibration flexibility for next-generation SoC integration.

FAQ

What is the maximum data rate supported by W66BM6NBUAGJ TR?

W66BM6NBUAGJ TR supports a maximum data rate of 4266 Mbps, achieved at a 2133 MHz differential clock frequency with BL16 burst length. This value is confirmed in the AC timing tables (Section 7.4.8) and aligns with JEDEC JESD209-4B LPDDR4X specification. The W66BM6NBUAGJ TR achieves this rate using 1.1 V I/O voltage and calibrated DQS-DQ timing alignment.

Does W66BM6NBUAGJ TR support temperature-compensated refresh (TRR)?

Yes, W66BM6NBUAGJ TR implements TRR mode per MR39 and MR40 register definitions (Section 7.3.32–7.3.33), using an integrated temperature sensor to dynamically adjust refresh intervals. This feature reduces average current draw in thermally stable conditions and is explicitly enabled via mode register writes. The W66BM6NBUAGJ TR datasheet provides TRR timing constraints and thermal offset calibration procedures.

What package type and dimensions does W66BM6NBUAGJ TR use?

W66BM6NBUAGJ TR uses a 200-ball WFBGA package measuring 10 mm × 12 mm × 0.65 mm with 0.65 mm ball pitch. This is documented in Section 4.1 (Single-Die-Package ball assignment) and confirmed in the ordering information table. The W66BM6NBUAGJ TR package supports standard LPDDR4X layout rules including escape routing and thermal pad grounding.

Is W66BM6NBUAGJ TR compatible with standard LPDDR4 controllers?

No - W66BM6NBUAGJ TR is LPDDR4X-specific and requires a host controller supporting JESD209-4B. Key differences include 1.1 V VDDQ (vs LPDDR4's 1.8 V), mandatory VREF training, and TRR mode registers. While pin-compatible with some LPDDR4 layouts, the W66BM6NBUAGJ TR demands updated PHY firmware and timing parameter revalidation for voltage scaling and calibration sequences.

What calibration features are supported by W66BM6NBUAGJ TR?

W66BM6NBUAGJ TR supports CA VREF training, DQ VREF training, command bus training, write leveling, RD DQ calibration, and DQS-DQ training - all initiated via Multi-Purpose Command (MPC) or mode register writes. These are detailed in Sections 7.4.26–7.4.32. The W66BM6NBUAGJ TR uses dedicated training modes rather than relying solely on boot-time initialization, enabling runtime adaptation.