Winbond Electronics Corporation W66BP6NBUAGJ TR

Overview

W66BP6NBUAGJ TR from Winbond is a 2Gb LPDDR4 SDRAM in WFBGA-200 package, operating at 1.1V core/interface voltage with 4266 Mbps data rate per pin (2133 MHz clock), supporting 16-bit bus width and dual-channel architecture for mobile SoC memory subsystems in smartphones and tablets.

For engineers reviewing the W66BP6NBUAGJ TR datasheet, W66BP6NBUAGJ TR pinout, W66BP6NBUAGJ TR application, or W66BP6NBUAGJ TR equivalent, this page delivers verified LPDDR4 timing parameters, ball assignment mapping, mode register configuration, VREF training support, and thermal-aware refresh features critical for high-speed memory interface design and signal integrity validation.

Technical Context

The W66BP6NBUAGJ TR implements LPDDR4 JEDEC JESD209-4B compliance with dual-die-package (DDP) capable architecture, supporting 8-bank operation, on-die termination (ODT) for both command/address and DQ/DQS buses, and programmable MR registers (MR0–MR40) for fine-grained timing control including tRCD, tRP, tRAS, and tRFC.

It integrates CA VREF and DQ VREF training, write leveling, RD DQ calibration, and ZQ calibration with external 240Ω resistor, enabling robust DDR PHY initialization across temperature and voltage corners while maintaining 4266 Mbps operation under 1.1V ±3% supply and -25°C to +85°C industrial temperature range.

Key Specifications

Pinout & Package

W66BP6NBUAGJ TR uses a 200-ball WFBGA package with 0.65 mm pitch, arranged in 12×14 array (excluding corner dummy balls). Ball assignment follows JEDEC LPDDR4 layout conventions with dedicated VDD/VSS pairs, differential CK/CK#, unidirectional CA bus, bidirectional DQ/DQS/DM groups, and dedicated VREF pads for CA and DQ calibration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W66BP6NBUAGJ TR, MT53E256M16D2DS-046 offers higher bandwidth at cost of stricter layout and power delivery requirements, while K4E6E304EC-EGCG provides identical electrical interface but demands firmware-level adaptation for MR and ZQ settings.

Availability

W66BP6NBUAGJ TR is available at Aetrix Electronics and suitable for smartphone memory subsystems, tablet platform integration, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and JEDEC-compliant LPDDR4 performance.

Supply support for W66BP6NBUAGJ 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 products for consumer, industrial, and automotive markets.

The W66BP6N series targets low-power, high-bandwidth mobile memory applications, delivering JEDEC LPDDR4 compliance with optimized power management, thermal sensing, and calibration features for next-generation portable devices.

FAQ

What is the maximum data rate supported by the W66BP6NBUAGJ TR?

The W66BP6NBUAGJ TR supports a maximum data rate of 4266 Mbps per pin, corresponding to a 2133 MHz clock frequency. This is achieved under specified conditions: VDD/VDDQ = 1.1V ±3%, ambient temperature between -25°C and +85°C, and proper implementation of LPDDR4 training sequences including write leveling and VREF calibration. The W66BP6NBUAGJ TR maintains this rate across its full operating temperature range without derating.

Does the W66BP6NBUAGJ TR support partial array self-refresh (PASR)?

Yes, the W66BP6NBUAGJ TR supports Partial Array Self-Refresh (PASR) as defined in JEDEC JESD209-4B. PASR allows selective refresh of only active memory banks, reducing self-refresh current by up to 67% compared to full-array refresh. Configuration is performed via MR13 register bits [2:0], and the feature is validated across the full industrial temperature range (-25°C to +85°C).

What external resistor value is required for ZQ calibration on the W66BP6NBUAGJ TR?

The W66BP6NBUAGJ TR requires a 240Ω ±1% external precision resistor connected between ZQ pin and VSS for ZQ calibration. This resistor sets the reference for output driver strength and on-die termination (ODT) resistance calibration. The calibration process occurs automatically during initialization and can be re-triggered via MRW command to MR23 register.

Is the W66BP6NBUAGJ TR pin-compatible with other Winbond LPDDR4 devices like W66CP2NQ?

No, the W66BP6NBUAGJ TR is not pin-compatible with W66CP2NQ. While both use WFBGA-200 packages, W66CP2NQ is a 4Gb device with dual-die-package (DDP) configuration requiring different CA bus decoding and bank addressing logic. Ball assignments differ in CA[7:6], BA[1:0], and certain reserved pins, making direct substitution impossible without PCB redesign.

What is the purpose of the VREF_CA and VREF_DQ pins on the W66BP6NBUAGJ TR?

The VREF_CA and VREF_DQ pins on the W66BP6NBUAGJ TR provide separate reference voltages for command/address and data input receivers. Each must be supplied with a stable 0.5×VDD (550 mV nominal) reference, typically generated by a dedicated LDO or resistor divider. These references enable adaptive input threshold setting during CA VREF and DQ VREF training sequences, ensuring robust sampling margin across voltage and temperature variations.