Winbond Electronics Corporation W66CM2NQUAGI TR

Overview

W66CM2NQUAGI TR from Winbond is a 4Gb LPDDR4X 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-die-package (DDP) architecture for mobile SoC memory subsystems in smartphones and tablets.

For engineers reviewing the W66CM2NQUAGI TR datasheet, W66CM2NQUAGI TR pinout, W66CM2NQUAGI TR application, or W66CM2NQUAGI TR equivalent, key selection criteria include LPDDR4X JEDEC compliance, DDP configuration support, CA/DQ VREF training capability, and thermal offset compensation for high-density mobile memory designs.

Technical Context

This device implements JEDEC-standard LPDDR4X protocol with dual-rank DDP topology, supporting 16 banks per die and configurable burst lengths (BL16/BL32). It integrates on-die termination (ODT) for both command/address and DQ/DQS buses, plus programmable MR registers (MR0–MR40) for timing, voltage, and thermal calibration.

The W66CM2NQUAGI TR supports full LPDDR4X features including write leveling, read DQ calibration, DQS-DQ training, ZQ calibration, and Target Row Refresh (TRR). Its command bus training and CA/DQ VREF training enable robust signal integrity at 4266 Mbps across temperature and voltage corners.

Key Specifications

Pinout & Package

W66CM2NQUAGI TR uses a 200-ball WFBGA package with 0.65 mm ball pitch. Pin assignments follow JEDEC LPDDR4X layout conventions and are defined for Dual-Die-Package (DDP) operation per Section 4.2 of the datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT53E256M32D2DS-053 WT:A and K4U6E3046E-BCGC, the W66CM2NQUAGI TR offers integrated TRR hardware and unified CA/DQ VREF training - reducing firmware complexity and improving row hammer resilience in thermally constrained 5G handset layouts.

Availability

W66CM2NQUAGI TR is available at Aetrix Electronics and suitable for smartphone main memory, tablet platform memory, and mobile SoC reference design applications requiring stable component supply, long-term lifecycle support, and JEDEC-compliant LPDDR4X performance.

Supply support for W66CM2NQUAGI 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 serial NOR/NAND Flash, RAM, and DRAM products for consumer, communications, and industrial markets.

The W66CM2NQ series targets mobile and edge computing applications demanding high-density, low-voltage, JEDEC-compliant LPDDR4X memory with advanced calibration and reliability features.

FAQ

What is the memory organization of the W66CM2NQUAGI TR?

The W66CM2NQUAGI TR is a 4Gb Dual-Die-Package (DDP) LPDDR4X SDRAM organized as two 2Gb dies, each configured as 512 M words × 8 bits. It supports 16 banks per die and uses a 16-bit prefetch architecture. This structure enables high bandwidth within the compact 200-ball WFBGA footprint while maintaining JEDEC LPDDR4X compatibility.

Does the W66CM2NQUAGI TR support write leveling and read DQ calibration?

Yes, the W66CM2NQUAGI TR fully supports JEDEC-defined write leveling and read DQ calibration procedures. These are implemented via dedicated MR registers (e.g., MR30 for write leveling mode) and MPC commands, enabling precise timing alignment between CK and DQS/DQ signals at 4266 Mbps - critical for signal integrity in high-speed mobile memory channels.

What is the purpose of the thermal offset feature in the W66CM2NQUAGI TR?

The thermal offset feature in the W66CM2NQUAGI TR uses an on-die temperature sensor to dynamically adjust internal timing parameters (e.g., tRCD, tRP) across the -25°C to +85°C operating range. This ensures timing margins remain compliant without requiring conservative worst-case derating, directly improving system-level reliability in thermally variable mobile environments.

How does the Target Row Refresh (TRR) function operate in the W66CM2NQUAGI TR?

The W66CM2NQUAGI TR implements hardware-based Target Row Refresh (TRR) per JEDEC JESD209-4B Annex C. It detects aggressive row activation patterns and automatically schedules supplemental refreshes to vulnerable rows, mitigating row hammer without host software intervention. This preserves data integrity in 5G modems and AI accelerators with bursty memory access profiles.

Is the W66CM2NQUAGI TR pin-compatible with other Winbond LPDDR4X parts like W66BM6NB?

No, the W66CM2NQUAGI TR is not pin-compatible with W66BM6NB. While both use 200-ball WFBGA packages, W66BM6NB is a 2Gb Single-Die-Package (SDP) part with different ball assignment (Section 4.1), whereas W66CM2NQUAGI TR follows the Dual-Die-Package (DDP) ball map (Section 4.2) - requiring distinct PCB layout and signal routing.