W948D6FBHX5I - 256Mb LPDDR SDRAM 200MHz | Winbond
MPN： W948D6FBHX5I ✓ 啟用中W948D6FBHX5I 概覽
LPDDR SDRAM is a volatile DRAM variant optimized for battery-powered and thermally constrained systems. Unlike standard DDR DRAM, mobile LPDDR uses a 1.8 V core supply, deeper power-down modes, a temperature-compensated self-refresh (TCSR) feature, and partial-array self-refresh (PASR) to cut standby current. In the memory hierarchy it sits between SRAM and standard DDR SDRAM, forming the main-memory tier of embedded SoC platforms.
Key features of the W948D6FBHX5I include the x16 parallel data interface, which reduces bus width and pin count versus x32 parts, a 200 MHz clock rate supporting LPDDR-200 throughput of 400 MB/s per pin pair, and the industrial temperature variant denoted by the I suffix in the ordering code. The VFBGA ball-grid package minimizes board area at 72 mm2 and improves signal integrity through short, controlled-impedance ball interconnects.
Internally the device uses four independent banks with a burst length of 2, 4, or 8, allowing efficient random and sequential access. Power management modes include deep power-down, self-refresh, and power-down, with typical operating current in the tens of milliamp range and standby current in the microamp range when self-refresh is enabled.
Typical applications include industrial HMI and gateways, portable medical instruments, telematics and tracking devices, and embedded Linux/RTOS systems where an application processor requires 32 MB of low-power main memory.
When designing with this part, match the controller timing registers to the 5 ns cycle time and route the address/control bus as a matched-length fly-by or point-to-point group within the 1.8 V SSTL-18-style I/O regime; series termination is usually unnecessary at this speed for short traces.
This page consolidates distributor availability, pricing tiers, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 W948D6FBHX5I — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： W948D6FBHX5I （相同外形與佔位） — 差異在於 Interface, Memory Type, Organization, Package.
W948D6KBHX6E
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
W948D6FBHX6E
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
W948D6FBHX5I-TR
✅ 直接替換聯絡詢價
查看資料表 →W948D6FBHX5I 最大額定值與電氣特性
| 記憶體類型 | SDRAM - Mobile LPDDR |
| 記憶體容量 | 256 Mbit |
| 組織 | 4M x 4 banks x 16 |
| 介面 | Parallel, 16-bit |
| Clock Frequency | 200 MHz |
| Access Time / Clock Cycle | 5 ns |
| Supply Voltage (VDD/VDDQ) | 1.8 V |
| Number of Banks | 4 |
| Burst Length | 2, 4, 8 |
| 封裝 | 60-VFBGA (8 x 9 mm, 0.80 mm pitch) |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +85C (industrial) |
| Power Modes | Deep power-down, self-refresh, power-down, PASR, TCSR |
| Memory Format | DRAM (volatile) |
| RoHS 狀態 | Compliant |
| Packaging Variant | Tray / Tape & Reel (W948D6FBHX5I-TR) |
W948D6FBHX5I 60-vfbga (8 x 9 mm, 0.80 mm pitch) 腳位配置指南
W948D6FBHX5I（60-vfbga (8 x 9 mm, 0.80 mm pitch) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： W948D6FBHX5I.
請參閱 資料表 以查看完整腳位配置。
典型應用
W948D6FBHX5I 適用於 6 應用s: Industrial HMI and Gateways, Portable Medical Instruments, Telematics and Asset Tracking, Embedded Linux SoC Systems, Smart Meters and IoT Nodes, Portable Audio and Display Devices.
Industrial HMI and Gateways
Industrial human-machine interfaces and edge gateways run embedded Linux images whose kernel and application working sets exceed on-chip SRAM by orders of magnitude. The W948D6FBHX5I provides 32 MB of main memory on a 16-bit bus at 200 MHz, delivering 400 MB/s class bandwidth sufficient for GUI frame buffers and protocol stacks. Its industrial -40C to +85C rating matches factory-floor ambient extremes, while self-refresh with PASR keeps context alive during duty-cycled sleep, cutting average system current in battery-backed nodes. Placed close to the SoC with short matched-length address/data routing, the 60-VFBGA package also withstands vibration better than fine-pitch leaded packages.
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Portable Medical Instruments
Portable patient monitors, infusion pumps, and handheld diagnostic instruments require memory that preserves state through display sleep and button-press idle periods. The W948D6FBHX5I's deep power-down and temperature-compensated self-refresh reduce standby current to microamp levels, directly extending battery run-time between charges in 2-cell Li-ion designs. The 1.8 V single rail simplifies the power tree of densely integrated handhelds, and the 60-VFBGA (8x9 mm) footprint fits compact main boards. At 200 MHz on the x16 interface, it sustains waveform rendering and logging workloads while generating no switching noise beyond ordinary DRAM activity, simplifying low-noise analog front-end co-design.
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Telematics and Asset Tracking
Fleet trackers and telematics control units duty-cycle between GPS fixes and cellular uploads, making sleep current the dominant battery-life factor. The W948D6FBHX5I retains buffer and context data in self-refresh with PASR, so the application processor can power down between events while preserving queue state for store-and-forward messaging. Its industrial temperature range covers under-dash and outdoor enclosure environments from -40C to +85C. The 256 Mbit density is the sweet spot for RTOS stacks plus message buffers, and the 1.8 V rail is directly compatible with cellular module VDD_IO domains, avoiding level-shifting on the memory bus.
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Embedded Linux SoC Systems
ARM Cortex-A class SoCs running trimmed embedded Linux builds commonly pair with 256 Mb LPDDR as the minimum viable main memory. The W948D6FBHX5I connects through the SoC's mobile DDR controller at 200 MHz with burst lengths of 2/4/8, supporting kernel, rootfs-in-RAM, and application working sets around 32 MB. LPDDR-specific controller features such as temperature-compensated refresh are supported by the device's TCSR mode, letting the controller relax refresh rates at moderate temperatures to save power. Designers should configure controller timing registers to the datasheet 5 ns cycle and route fly-by or point-to-point bus groups with matched lengths for first-pass signal integrity.
推薦
Smart Meters and IoT Nodes
Smart electricity and water meters accumulate measurement buffers and security logs while spending most of their life asleep. The W948D6FBHX5I's self-refresh retention allows metering firmware to buffer readings between radio or PLC transmissions without writing flash each sample, extending flash endurance and lowering energy per sample. The 1.8 V I/O interfaces cleanly to ultra-low-power MCU/SoC domains, and deep power-down disables the DRAM entirely for multi-year-shelf-life modes. The industrial grade handles unconditioned outdoor cabinets, and the 60-VFBGA package's low profile suits meter PCBs with constrained vertical clearance under enclosures.
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Portable Audio and Display Devices
Portable audio recorders, Bluetooth speakers with displays, and low-cost media players need buffer memory for audio streams and small frame buffers. The W948D6FBHX5I's 16-bit, 200 MHz interface supplies the sustained bandwidth for streaming audio decode plus display refresh, while power-down modes mute memory activity during playback pauses. Because the device operates from 1.8 V shared with codec and display I/O rails, the power architecture stays simple. Designers should isolate the memory bus from the analog audio section in layout and use the burst capabilities to service DMA efficiently, keeping CPU wake-ups and thus power consumption low during continuous playback.
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推薦產品摘要
工程參考資料，適用於 W948D6FBHX5I — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | W948D6KBHX6E | W948D6FBHX6E | W948D6FBHX5I-TR |
|---|---|---|---|---|
| Package | 60-VFBGA (8x9 mm, 0.80 mm) | 60-VFBGA (8x9 mm, 0.80 mm) - same | 60-VFBGA (8x9 mm, 0.80 mm) - same | 60-VFBGA (8x9 mm, 0.80 mm) - same |
| Brand | Winbond Electronics | Winbond Electronics | Winbond Electronics | Winbond Electronics |
| Memory Size | 256 Mbit | 256 Mbit | 256 Mbit | 256 Mbit |
| Organization | 4M x 4 banks x 16 | 4M x 4 banks x 16 | 4M x 4 banks x 16 | 4M x 4 banks x 16 |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
主要差異化特點
- Industrial temperature rating in a compact 60-VFBGA (對比W948D6KBHX6E)
- Low-power mobile DRAM feature set (PASR + TCSR) (對比W948D6FBHX5I-TR)
- Trade-off: maturing generation vs active successor (對比W948D6KBHX6E)
設計說明
At 200 MHz on the 16-bit LPDDR bus, keep address, control, and data trace groups matched within 50 mil skew and length-matched per byte lane. The 60-VFBGA 0.80 mm pitch permits 4-mil trace/6-mil space escape routing; use 2 inner layers dedicated to the memory bus when possible. Series termination is typically unnecessary for trace lengths under 3 inches at this data rate, but verify overshoot against the datasheet absolute maximum I/O ratings.
Decouple VDD and VDDQ independently with at least 100 nF per ball-pair cluster plus 10 uF bulk per rail, placed within 3 mm of the VFBGA ball exits. The 1.8 V single-rail architecture means core and I/O noise couple, so separate power islands with a ferrite bead or dedicated regulator output per rail prevents refresh-current spikes from appearing on the quiet I/O reference. Estimated peak current is in the tens-of-mA range per the distributor-listed 55 mA figure at Hotenda.
Do not reuse a ball map from another vendor's LPDDR part: Winbond's 60-VFBGA ball assignment is vendor-specific and a footprint generated from a Micron or Nanya datasheet will not match. Also configure the controller for the correct speed grade (5 ns cycle) and enable TCSR-aware refresh scheduling only if your controller supports it - forcing a fixed high refresh rate wastes the low-power benefit. Finally, confirm lifecycle status with Winbond before new designs, as distributor data shows the FB generation being superseded by the KB family.
合規資訊
RoHS compliant per distributor listing of this mobile LPDDR part; other compliance attributes not stated in the provided web data.
