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Winbond Electronics Corporation W25Q256JWFIQ
- Part No.:
- W25Q256JWFIQ
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
W25Q256JWFIQ.pdf
- Description:
- IC FLASH 256MBIT SPI/QUAD 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:141
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Product details
Overview
W25Q256JWFIQ from Winbond is a 1.8V, 256M-bit (32MB) serial NOR flash memory supporting Standard/Dual/Quad SPI interfaces with 4KB uniform sectors, 133MHz Quad I/O clock capability, and industrial temperature range (–40°C to +85°C). It enables XIP execution, code shadowing, and secure parameter storage in space-constrained embedded systems.
For engineers reviewing the W25Q256JWFIQ datasheet, W25Q256JWFIQ pinout, W25Q256JWFIQ application, or W25Q256JWFIQ equivalent, key selection criteria include 1.7–1.95V supply compatibility, JEDEC SFDP register support, 64-bit unique ID, quad I/O timing compliance, and hardware write-protect (/WP) and hold (/HOLD) functionality.
Technical Context
The W25Q256JWFIQ implements a flexible SPI command architecture supporting 3-byte and 4-byte addressing modes, with non-volatile ADP bit controlling power-up address mode. Its status register set includes volatile/non-volatile BP bits for sector-level protection and QE bit enabling Quad I/O operation.
It integrates three 256-byte one-time-programmable (OTP) security registers, supports erase/program suspend/resume, and features dual-mode /HOLD or /RESET functionality on select packages-dedicated /RESET available only in SOIC-16 and TFBGA variants per ordering option.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 M-bit (32 MB), organized as 131,072 × 256-byte pages |
| Supply Voltage | 1.7 V to 1.95 V - enables low-power operation in battery-backed or energy-efficient systems |
| Max Clock Frequency | 133 MHz Quad I/O - delivers up to 532 MB/s effective throughput using Fast Read Quad I/O (6Ch) |
| Erase Granularity | Uniform 4 KB sectors (8,192 total), 32 KB blocks (4,096), 64 KB blocks (512), and full chip erase |
| Data Retention | 20+ years - specified under industrial temperature conditions without refresh |
| Endurance | 100,000 program/erase cycles per sector - validated for firmware update and logging applications |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade reliability without derating |
| Security Features | 64-bit unique ID, SFDP register, three 256-byte OTP security registers, and individual sector lock/unlock (36h/39h) |
Pinout & Package
W25Q256JWFIQ is packaged in an 8-pad WSON 6×5 mm (Package Code P), with exposed pad thermal enhancement. Pin functions are fully compatible with standard SPI, Dual SPI, and Quad SPI protocols, with /HOLD repurposed as IO3 when Quad Enable (QE) is active.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable; places DO/IO pins in high-impedance state when deasserted |
| DO (IO1) | Serial Data Output / Quad I/O 1 | Unidirectional output in Standard SPI; bidirectional I/O in Dual/Quad modes |
| /WP (IO2) | Write Protect Input / Quad I/O 2 | Hardware lock for status register writes; becomes IO2 when QE=1 |
| GND | Ground Reference | Primary return path for all I/O and core logic; requires low-impedance PCB connection |
| DI (IO0) | Serial Data Input / Quad I/O 0 | Unidirectional input in Standard SPI; bidirectional I/O in Dual/Quad modes |
| CLK | Serial Clock Input | Edge-triggered timing reference for all SPI operations; max 133 MHz in Quad I/O mode |
| /HOLD or /RESET (IO3) | Hold Control / Quad I/O 3 | Pauses ongoing SPI transfer when asserted low; becomes IO3 in Quad mode (QE=1) |
| VCC | Power Supply | 1.7–1.95 V core supply; decoupling capacitor required per datasheet layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O Interface | Enables 532 MB/s read throughput via Fast Read Quad I/O (6Ch), eliminating need for parallel NOR in bandwidth-sensitive boot loaders |
| Erase/Program Suspend | Allows background read access during long erase/program operations (75h/7Ah), critical for real-time firmware updates |
| Individual Sector Lock | Per-sector lock/unlock (36h/39h) enables fine-grained protection of calibration data or secure keys without affecting adjacent sectors |
| JEDEC SFDP Support | Standardized Flash Parameter Table (5Ah) allows automatic configuration by host bootloader without hard-coded timing values |
| OTP Security Registers | Three 256-byte one-time-programmable registers provide tamper-resistant storage for cryptographic keys or device-specific credentials |
| 4-Byte Address Mode | Supports >16 MB addressing via B7h/E9h commands - essential for full 32 MB utilization without address wraparound |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Image |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary non-volatile code storage with XIP-capable Quad SPI interface for deterministic boot latency. Use Value: 20-year data retention and –40°C to +85°C qualification ensure firmware integrity across extended maintenance cycles without refresh. |
Use Scenario: Hosting certified boot loader and diagnostic firmware in portable ultrasound and infusion pump systems requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure boot source with 64-bit unique ID and OTP security registers for device identity binding. Use Value: Individual sector locking prevents unauthorized modification of FDA-cleared firmware partitions while allowing field-upgradable diagnostics. |
| Automotive Infotainment Head Unit | Smart Energy Meter Firmware |
|
Use Scenario: Storing UI assets, map data, and OTA update staging area in automotive infotainment units with strict AEC-Q100 alignment. IC Role / Device Role / Timing Role: High-bandwidth Quad SPI flash providing 66 MB/s continuous read for rapid GUI asset loading. Use Value: 133 MHz Quad I/O clock and Fast Read Quad I/O (6Ch) reduce boot time by >40% versus legacy 80 MHz SPI flash alternatives. |
Use Scenario: Holding firmware, tariff tables, and encrypted metering logs in ANSI C12.22-compliant smart electricity meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Industrial-grade serial flash with hardware write-protect (/WP) and power-down current <1 µA for battery backup operation. Use Value: Low 1.7–1.95 V supply range and <1 µA power-down current extend coin-cell life during grid outages beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L25645GMI-13G | 3.3 V supply, no 4-byte address mode, lacks SFDP register and OTP security registers | Suitable for legacy 3.3 V designs without secure boot or >16 MB addressing needs | Select only if system voltage is fixed at 3.3 V and security/expandability requirements are minimal |
| S25FL256SAGMFI000 | 1.8 V supply, supports 4-byte addressing and SFDP, but offers only 64 KB erase granularity (no 4 KB sectors) | Better for large firmware images where fine-grained parameter updates are unnecessary | Prefer when sector-level flexibility is less critical than Cypress-compatible command set and QSPI octal support |
Compared with MX25L25645GMI-13G and S25FL256SAGMFI000, W25Q256JWFIQ uniquely combines 1.8 V operation, 4 KB sector erasure, SFDP, OTP security registers, and 133 MHz Quad I/O - making it optimal for next-generation secure, low-power, and space-constrained embedded boot storage.
Availability
W25Q256JWFIQ is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive infotainment, and smart utility metering requiring stable component supply across extended product lifecycles.
Supply support for W25Q256JWFIQ 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 serial NOR/NAND flash and RAM products for industrial, communications, and consumer markets.
The W25Q256JWFIQ belongs to Winbond's 25Q high-performance serial flash product line, designed specifically for embedded systems demanding fast XIP execution, robust security, and industrial-grade reliability in compact form factors.
FAQ
What is the maximum supported SPI clock frequency for W25Q256JWFIQ in Quad I/O mode?
The W25Q256JWFIQ supports up to 133 MHz in Quad I/O mode, delivering an effective data rate of 532 MB/s using Fast Read Quad I/O (6Ch) instructions. This specification is guaranteed over the full –40°C to +85°C industrial temperature range and requires proper signal integrity layout per Winbond's AN-20001 guidelines.
Does W25Q256JWFIQ support 4-byte addressing, and how is it enabled?
Yes, W25Q256JWFIQ supports 4-byte addressing to access its full 32 MB capacity. It is enabled via the Enter 4-Byte Address Mode instruction (B7h); the ADP bit in Status Register-3 determines whether the device powers up in 3-byte or 4-byte mode. Exit is performed using E9h.
How does the /HOLD pin function differ between Standard/Dual SPI and Quad SPI modes on W25Q256JWFIQ?
In Standard/Dual SPI mode, /HOLD (Pin 7 in WSON) pauses ongoing transfers when pulled low. In Quad SPI mode, that same pin becomes IO3 - the fourth bidirectional data line - and /HOLD functionality is disabled. The /HOLD feature is only available when the Quad Enable (QE) bit is cleared (QE=0).
What security mechanisms does W25Q256JWFIQ provide for firmware protection?
W25Q256JWFIQ provides multiple layers: hardware write-protect (/WP) pin, non-volatile block protect bits (BP0–BP3), top/bottom/complement array protection, individual sector lock/unlock (36h/39h), three 256-byte OTP security registers, and a 64-bit unique ID. These allow hierarchical, field-updatable, and tamper-resistant firmware partitioning.
Is W25Q256JWFIQ pin-compatible with earlier Winbond W25Q256FV or W25Q256FW devices?
No - W25Q256JWFIQ uses an 8-pin WSON package with /HOLD or /RESET shared on Pin 7, whereas W25Q256FV/FW use 16-pin SOIC or different WSON variants with dedicated /RESET. Electrical and command-set compatibility exists, but PCB layout and pin mapping require revision for drop-in replacement.
W25Q256JWFIQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 256Mbit
- Memory Organization:
- 32M x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 133 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- 6 ns
- Voltage - Supply:
- 1.7V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
W25Q256JWFIQ FAQ
1.How can I place an order for W25Q256JWFIQ through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q256JWFIQ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for W25Q256JWFIQ reliable?
The price and inventory of W25Q256JWFIQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q256JWFIQ is usually 5 days.
3.What payment methods are accepted for W25Q256JWFIQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q256JWFIQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q256JWFIQ?
W25Q256JWFIQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q256JWFIQ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for W25Q256JWFIQ?
For technical support, including W25Q256JWFIQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q256JWFIQ requirements.
6.How does Aetrix verify that W25Q256JWFIQ is sourced from the original manufacturer or authorized distributors?
All W25Q256JWFIQ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that W25Q256JWFIQ meets industry standards.
7.What is the process for return or replacement of W25Q256JWFIQ?
All W25Q256JWFIQ units undergo pre-shipment inspection (PSI). If there is an issue with W25Q256JWFIQ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The W25Q256JWFIQ part is unused and in its original packaging.
Return procedure for W25Q256JWFIQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25Q256JWFIQ Tags
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