Winbond Electronics Corporation W948D6KBHX6I

Overview

W948D6KBHX6I from Winbond is a 256Mb mobile LPDDR SDRAM with x16 data width, 166MHz clock rate, and industrial temperature range (–40°C to +85°C), designed for low-power embedded applications requiring burst-oriented memory access with programmable latency and partial array self-refresh. It operates at 1.8V VDD/VDDQ and supports four internal banks for interleaved operation in portable devices.

For engineers reviewing the W948D6KBHX6I datasheet, W948D6KBHX6I pinout, W948D6KBHX6I application, or W948D6KBHX6I equivalent, key selection criteria include CAS latency (CL=2/3), burst length (2/4/8/16), deep power-down mode, differential clock interface (CK/CK̄), and 60-ball VFBGA package compatibility with mobile SoC memory subsystems.

Technical Context

This LPDDR SDRAM implements a four-bank architecture with independent row activation and column access, enabling bank interleaving to hide precharge delays. Its command decoder interprets CS, RAS, CAS, and WE with CKE-synchronized timing, while CK/CK̄ differential inputs govern all address/control sampling and DQS-aligned data transfers.

Initialization requires two auto-refresh cycles, mode register programming (MRS/EMRS), and strict tMRD wait states before operation. The device supports programmable output drive strength, automatic temperature-compensated self-refresh (ATCSR), and partial array self-refresh (PASR) to reduce dynamic and standby power in battery-constrained systems.

Key Specifications

Pinout & Package

W948D6KBHX6I uses a 60-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package with 0.5mm ball pitch, designed for high-density mobile PCB layouts and thermal efficiency in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W948D6KBHX6I, MT46H32M16LFCK-6 IT offers identical speed and temperature rating but lacks PASR and ATCSR, while IS42S16160J-6BLI omits deep power down entirely-making W948D6KBHX6I the only option delivering full low-power feature integration in a 60-ball industrial LPDDR package.

Availability

W948D6KBHX6I is available at Aetrix Electronics and suitable for smartphone application processors, industrial IoT edge controllers, portable medical diagnostics, automotive infotainment head units, and battery-powered embedded systems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for W948D6KBHX6I 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 markets.

W948D6KBHX6I belongs to Winbond's LPDDR SDRAM product line, engineered specifically for power-constrained portable electronics that demand high bandwidth, industrial temperature resilience, and advanced self-refresh intelligence.

FAQ

What is the maximum supported burst length for W948D6KBHX6I?

W948D6KBHX6I supports burst lengths of 2, 4, 8, and 16, selectable via Mode Register bits A0–A2. Each burst accesses contiguous or interleaved column locations within an active page, with addressing determined by A1–An depending on configured length. This flexibility allows optimization for sequential streaming or random access patterns in the W948D6KBHX6I memory subsystem.

Does W948D6KBHX6I support differential clock inputs?

Yes, W948D6KBHX6I uses differential clock inputs CK and CK̄. All address and control signals are sampled on the crossing of CK's positive edge and CK̄'s negative edge, and data is referenced to both crossings. This differential architecture improves noise immunity and timing margin in high-speed mobile PCB environments where the W948D6KBHX6I is deployed.

What power-saving modes does W948D6KBHX6I implement?

W948D6KBHX6I implements Power Down, Deep Power Down (DPD), Self Refresh, Partial Array Self Refresh (PASR), and Automatic Temperature Compensated Self Refresh (ATCSR). DPD reduces current to ≤10μA, while PASR and ATCSR dynamically scale refresh activity-key differentiators that make W948D6KBHX6I suitable for always-on battery-powered applications.

Is W948D6KBHX6I compatible with standard LPDDR2 controllers?

W948D6KBHX6I is an LPDDR (Low Power DDR) SDRAM-not LPDDR2-and complies with JEDEC JESD209 specification for first-generation LPDDR. It is not electrically or protocol-compatible with LPDDR2 controllers due to differences in command encoding, timing parameters, and voltage thresholds. System integration requires an LPDDR-compliant memory controller matched to the W948D6KBHX6I specification.

What is the ball pitch and footprint size of the W948D6KBHX6I package?

W948D6KBHX6I uses a 60-ball Very Thin Fine-Pitch BGA (VFBGA) package with 0.5mm ball pitch and overall dimensions of 5.0mm × 8.0mm × 0.6mm. This compact, low-profile footprint supports high-density routing in slim mobile and wearable form factors where the W948D6KBHX6I is commonly applied.