Winbond Electronics Corporation W948D2FBJX5E TR

Overview

W948D2FBJX5E TR from Winbond is a 256Mb mobile LPDDR SDRAM with x16 data bus, 1.7–1.95V VDD/VDDQ supply, CAS latency of 2 or 3, and support for burst lengths of 2/4/8/16 in sequential or interleave mode - used as main memory in portable SoC platforms requiring low-power, high-bandwidth DRAM.

For engineers reviewing the W948D2FBJX5E TR datasheet, W948D2FBJX5E TR pinout, W948D2FBJX5E TR application, or W948D2FBJX5E TR equivalent, key selection criteria include LPDDR interface compatibility, VFBGA-60 package fit, PASR/ATCSR power management features, and timing compliance with 133–200MHz clock rates in mobile embedded systems.

Technical Context

This LPDDR SDRAM implements four independent internal banks, enabling bank interleaving to hide precharge latency and sustain high effective bandwidth. It uses differential CK/CK inputs and bidirectional DQS strobes aligned with read/write data edges, supporting both auto-precharge and non-auto-precharge access modes.

Initialization requires strict sequencing: power ramp with CKE high, ≥200μs stable clocks, PRECHARGE ALL, two AUTO REFRESH commands, then Mode Register and Extended Mode Register programming. The device supports Deep Power Down (DPD) and Clock Stop modes for ultra-low standby current in battery-powered devices.

Key Specifications

Pinout & Package

W948D2FBJX5E TR uses a 60-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package, 8mm × 10.5mm × 0.6mm, compliant with JEDEC MO-240AB. Pinout follows LPDDR x16 standard with dedicated DQ/DQS/DM groups, differential CK/CK, and separate VDD/VDDQ/VSS/VSSQ supplies.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MT46H32M16LFCK-6 IT:F and IS42S16160J-6BLI, W948D2FBJX5E TR delivers unique low-power advantages via PASR and ATCSR - critical for battery runtime and thermal headroom - while maintaining pin-compatible x16 LPDDR functionality in the same 60-ball VFBGA footprint.

Availability

W948D2FBJX5E TR is available at Aetrix Electronics and suitable for smartphone application processor memory, tablet GPU frame buffer, automotive digital cluster display, and industrial handheld data terminal applications requiring stable component supply and long-term industrial temperature support.

Supply support for W948D2FBJX5E 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, DDR SDRAM, and mobile LPDDR products for consumer, industrial, and automotive markets.

W948D2FBJX5E TR belongs to Winbond's mobile LPDDR SDRAM product line, designed specifically for power-constrained portable SoC platforms needing high-density, low-voltage, low-standby-current DRAM with advanced refresh intelligence.

FAQ

What is the package type and ball count for W948D2FBJX5E TR?

W948D2FBJX5E TR uses a 60-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package measuring 8mm × 10.5mm × 0.6mm. This matches the LPDDR x16 configuration specified in the datasheet and is distinct from the 90-ball VFBGA used for x32 variants like W948D6FB. The ball layout complies with JEDEC MO-240AB and supports standard LPDDR x16 routing.

Does W948D2FBJX5E TR support CAS latency of 2 and 3?

Yes, W948D2FBJX5E TR supports programmable CAS latency of CL=2 and CL=3 via the Mode Register. CL=2 is supported at the highest speed grade (–5, 200MHz), while CL=3 applies to –6 (166MHz) and –75 (133MHz) grades. The selected CL value directly sets the minimum tRCD and tRP timing parameters and must be configured before normal operation begins.

What power-saving features does W948D2FBJX5E TR implement?

W948D2FBJX5E TR implements three key power-saving features: Partial Array Self Refresh (PASR), Automatic Temperature Compensated Self Refresh (ATCSR), and Deep Power Down (DPD) mode. PASR reduces refresh current by limiting refresh to active subarrays; ATCSR dynamically adjusts refresh rate based on die temperature; DPD lowers standby current to ≤10μA, enabling ultra-long battery retention.

Is W948D2FBJX5E TR compatible with standard LPDDR controllers?

Yes, W948D2FBJX5E TR is fully compliant with the JEDEC JESD209-2 LPDDR standard. It supports all required command protocols (ACTIVE, READ, WRITE, PRECHARGE, MRS, EMRS), timing parameters (tRCD, tRP, tRFC), and electrical signaling (LVCMOS 1.8V, differential CK/CK, bidirectional DQS). No controller firmware modification is needed beyond standard LPDDR initialization sequence configuration.

What is the operating temperature range for W948D2FBJX5E TR?

W948D2FBJX5E TR is rated for industrial temperature operation from –40°C to +85°C. This range is validated across all speed grades and power modes, including Deep Power Down and Self Refresh. The device meets industrial-grade reliability requirements for automotive infotainment, rugged handhelds, and factory automation equipment where ambient thermal conditions exceed commercial limits.