Winbond Electronics Corporation W66BL6NBUAHJ

Overview

W66BL6NBUAHJ from Winbond Electronics is a 2Gb LPDDR4 SDRAM in single-die-package WFBGA-200 configuration, operating at 1.1V core/VDDQ with 4266 Mbps data rate per pin (2133 MHz clock), supporting 16-bit bus width and dual-channel x8 organization for mobile application processors. It delivers high bandwidth for smartphone SoC memory subsystems requiring low power and fast random access.

For engineers reviewing the W66BL6NBUAHJ datasheet, W66BL6NBUAHJ pinout, W66BL6NBUAHJ application, or W66BL6NBUAHJ equivalent, key selection criteria include LPDDR4-4266 timing compliance, VREFDQ/CA training support, on-die termination (ODT) for DQ/DQS/CA buses, MR39–MR40 thermal offset calibration, and dual-rank command bus training capability.

Technical Context

This device implements full LPDDR4 JEDEC JESD209-4B compliance including burst length BL16, read/write leveling, CA/DQ VREF training, and multi-purpose command (MPC) execution for dynamic calibration. It supports self-refresh with temperature-sensor-triggered refresh rate adjustment and TRR (Target Row Refresh) to mitigate row hammer effects.

The W66BL6NBUAHJ uses a 8-bank architecture with programmable bank group mode, supports masked write and data bus inversion (DBI), and features ZQ calibration with external 240Ω ±1% resistor for output driver impedance tuning across voltage and temperature.

Key Specifications

Pinout & Package

W66BL6NBUAHJ is housed in a 200-ball Wafer-Level Fine-Pitch Ball Grid Array (WFBGA) package with 0.5 mm pitch, 8 mm × 12 mm body size, and 0.65 mm maximum height. Ball assignment follows JEDEC-standard LPDDR4 layout for SDP configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LPDDR4 memory applications.

Compared with W66BL6NBUAHJ, MT53E2G32D2NP-046 WT:A offers identical density and speed but omits thermal-aware refresh calibration, while K4U6E3046E-BCGC matches all key LPDDR4-4266 features except extended temperature coverage - making W66BL6NBUAHJ optimal for designs needing guaranteed operation up to +85°C case temperature with autonomous thermal adaptation.

Availability

W66BL6NBUAHJ is available at Aetrix Electronics and suitable for smartphone application processor memory, automotive infotainment head units, and edge AI camera modules requiring stable component supply, long-term lifecycle support, and JEDEC-compliant LPDDR4-4266 performance.

Supply support for W66BL6NBUAHJ 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 NOR/NAND Flash, SRAM, and low-power DRAM for mobile and embedded systems.

The W66BL6NB series is designed specifically for LPDDR4-compliant mobile platforms, emphasizing power efficiency, JEDEC timing compliance, and robustness under thermal and voltage variation - targeting direct integration with application processors in space-constrained handheld devices.

FAQ

What is the exact memory organization of W66BL6NBUAHJ?

W66BL6NBUAHJ is organized as 256 M words × 8 bits (2 Gb total), configured as two 128 M × 8 banks in single-die-package (SDP) mode. It supports x8 dual-channel operation with independent command/address routing per channel, enabling 16-bit effective bus width and full LPDDR4-4266 compliance at 2133 MHz clock frequency.

Does W66BL6NBUAHJ support LPDDR4X voltage scaling?

No, W66BL6NBUAHJ operates strictly at 1.1 V for both VDD and VDDQ per JEDEC JESD209-4B specification. It does not support the 0.6 V VDDQ low-voltage mode defined in LPDDR4X (JESD209-4C). The device's DC operating conditions specify 1.1 V ±0.055 V, and its ZQ calibration, ODT, and timing parameters are validated only within this range.

How is thermal compensation implemented in W66BL6NBUAHJ?

W66BL6NBUAHJ implements thermal compensation via MR39 (thermal offset) and MR40 (temperature sensor readout), both defined in JEDEC JESD209-4B. MR39 stores a factory-programmed offset value applied to refresh timing calculations, while MR40 provides real-time die temperature data usable by the memory controller to adjust tRFC dynamically - ensuring reliability across –25°C to +85°C case temperature.

What package variant does W66BL6NBUAHJ use?

W66BL6NBUAHJ uses the single-die-package (SDP) variant in a 200-ball WFBGA package (8 mm × 12 mm × 0.65 mm, 0.5 mm pitch), distinct from the dual-die-package (DDP) version used in the W66CL2NQ family. Ball assignment follows JEDEC-standard LPDDR4 SDP layout, verified in Section 4.1 of the official datasheet (Rev A01-003).

Is W66BL6NBUAHJ compatible with standard LPDDR4 controllers?

Yes, W66BL6NBUAHJ is fully compliant with JEDEC JESD209-4B and interoperable with industry-standard LPDDR4 memory controllers, including those in MediaTek, Qualcomm, and Samsung application processors. It supports all mandatory commands (ACT, READ, WRITE, PRE, REF, SRE, etc.), training sequences (CA/DQ VREF, read/write leveling), and mode register definitions required for initialization and runtime operation.