Winbond Electronics Corporation W948D6FBHX5I

Overview

W948D6FBHX5I from Winbond is a 256Mb mobile LPDDR SDRAM with x16 data bus, 1.7–1.95V VDD/VDDQ supply, CAS latency 2 or 3, and 200MHz clock rate (−5 speed grade), designed for low-power mobile applications requiring burst-oriented memory access with partial array self-refresh and temperature-compensated refresh.

For engineers reviewing the W948D6FBHX5I datasheet, W948D6FBHX5I pinout, W948D6FBHX5I application, or W948D6FBHX5I equivalent, this device supports LPDDR interface timing compliance, programmable output drive strength, deep power-down mode, differential clock inputs (CK/CK), and bidirectional DQS strobes - critical for battery-constrained handheld and embedded systems.

Technical Context

This LPDDR SDRAM implements four independent internal banks enabling bank interleaving to hide precharge latency. It uses differential CK/CK inputs for command/address sampling and edge-aligned DQS for read capture, with center-aligned DQS for write data capture. Burst operation supports sequential or interleave types at lengths of 2, 4, 8, or 16.

Initialization requires two auto-refresh commands, mode register programming (MRS/EMRS), and strict tMRD delays. Power management includes power-down, deep power-down (DPD), and automatic temperature-compensated self-refresh (ATCSR) with 64 ms refresh period - all configurable via extended mode registers.

Key Specifications

Pinout & Package

W948D6FBHX5I is packaged in a 60-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) optimized for x16 LPDDR interface layout, with separate VDDQ/VSSQ planes for I/O noise isolation and differential CK/CK inputs for timing robustness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT46H32M16LFCK-6 IT and IS42S16160F-6BLI, W948D6FBHX5I delivers unique low-power advantages via ATCSR and PASR, operates at true LPDDR signaling levels (1.8V, CK/CK, DQS), and supports faster 200MHz operation - making it the only viable option for modern mobile SoC memory subsystems requiring LPDDR compliance.

Availability

W948D6FBHX5I is available at Aetrix Electronics and suitable for smartphone main memory, tablet GPU frame buffers, wearable runtime memory, and IoT edge device cache applications requiring stable component supply, industrial temperature support, and LPDDR protocol compliance.

Supply support for W948D6FBHX5I 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 memory ICs, flash storage, and security solutions, with over 30 years of DRAM design expertise and global manufacturing partnerships.

W948D6FBHX5I belongs to Winbond's Mobile LPDDR SDRAM product line, engineered specifically for battery-powered portable devices where power efficiency, thermal resilience, and compact packaging are mandatory design constraints.

FAQ

What is the speed grade and maximum data rate of W948D6FBHX5I?

W948D6FBHX5I is a −5 speed grade device, rated for 200MHz clock frequency and 400MT/s data transfer rate. It supports CAS latency 2 or 3, and its timing parameters (e.g., tAC, tDQSS) are specified under 1.8V VDD/VDDQ and industrial temperature conditions. The −5 suffix explicitly denotes this 200MHz performance level per Winbond's ordering nomenclature.

Does W948D6FBHX5I support differential clock inputs and DQS strobing?

Yes, W948D6FBHX5I requires differential CK and CK inputs for all command/address sampling and uses bidirectional UDQS and LDQS strobes - UDQS for DQ8–DQ15 and LDQS for DQ0–DQ7. These signals are edge-aligned with read data and center-aligned with write data, meeting LPDDR specification requirements for timing precision and noise immunity.

What power-saving features are implemented in W948D6FBHX5I?

W948D6FBHX5I implements four key power-saving features: Deep Power Down (DPD) mode drawing ≤10 µA, standard Power Down mode, Clock Stop capability during idle, and advanced refresh optimizations - Partial Array Self Refresh (PASR) and Automatic Temperature Compensated Self Refresh (ATCSR). These are configured via mode and extended mode registers during initialization.

What is the package type and ball count for W948D6FBHX5I?

W948D6FBHX5I uses a 60-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package, measuring 8mm × 12.5mm × 0.6mm. This x16-optimized package includes separate VDDQ/VSSQ balls for I/O power integrity and follows JEDEC MO-240AC mechanical standards - confirmed in Winbond's official package drawings and ordering information.

Is W948D6FBHX5I compatible with standard LPDDR controllers?

Yes, W948D6FBHX5I complies fully with JEDEC JESD209 LPDDR SDRAM specification. It supports all required commands (ACTIVE, READ, WRITE, PRECHARGE, AUTO REFRESH, MRS, EMRS), timing parameters (tRP, tRFC, tMRD), and electrical characteristics (LVCMOS I/O, differential CK/CK, DQS timing). Its pinout and initialization sequence are LPDDR-standard - no controller modification is needed beyond standard LPDDR PHY configuration.