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Winbond Electronics Corporation W25Q256FVEJQ TR
- Part No.:
- W25Q256FVEJQ TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
W25Q256FVEJQ TR.pdf
- Description:
- IC FLASH 256MBIT SPI/QUAD 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,496
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Product details
Overview
W25Q256FVEJQ TR from Winbond is a 256M-bit (32MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, organized into 131,072 × 256-byte pages with 4KB uniform sector erase granularity, operating from 2.7V to 3.6V, and rated for -40°C to +85°C industrial temperature range - used for code XIP, firmware storage, and parameter retention in embedded controllers and IoT edge devices.
For engineers reviewing the W25Q256FVEJQ TR datasheet, W25Q256FVEJQ TR pinout, W25Q256FVEJQ TR application, or W25Q256FVEJQ TR equivalent, key selection criteria include 104MHz SPI clock support, Quad I/O enable (QE bit), 4KB sector flexibility, hardware write protection via /WP and /HOLD pins, and JEDEC-compliant SFDP register access for auto-configuration.
Technical Context
The W25Q256FVEJQ TR implements a quad I/O-capable SPI interface with configurable 3- or 4-byte addressing modes, requiring non-volatile setting of the Quad Enable (QE) bit in Status Register-2 to activate IO2 (/WP) and IO3 (/HOLD) as data lines. Its command set includes Fast Read Quad I/O (6Bh/6Ch), Sector/Block/Chip Erase (20h/52h/D8h/C7h), and security register programming (42h/44h/48h).
It supports erase/program suspend-resume (75h/7Ah), continuous read with wrap (77h), and dual-purpose /HOLD or /RESET functionality on Pin 7 (WSON package), controlled by the HOLD/RST bit in Status Register-3 - with /RESET independent in SOIC-16 packages and disabled in Quad mode across all variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 M-bit (32 MB), enabling full firmware image storage for mid-tier microcontrollers |
| Interface Support | Standard/Dual/Quad SPI + QPI; QE bit required to enable 4-line data transfer |
| Max Clock Frequency | 104 MHz SPI; yields 416 MB/s effective throughput in Quad I/O Fast Read mode |
| Erase Granularity | Uniform 4 KB sectors (8,192 total), allowing fine-grained firmware update partitioning |
| Write Endurance | 100,000 program/erase cycles per sector, supporting field-upgradable device logic |
| Data Retention | 20 years at +85°C, validated for industrial lifecycle requirements without refresh |
| Supply Voltage | 2.7 V to 3.6 V single supply; compatible with 3.3 V logic systems without level shifting |
| Operating Temp | -40°C to +85°C; qualified for automotive body electronics and industrial control environments |
Pinout & Package
W25Q256FVEJQ TR uses an 8-pad WSON 8×6-mm package (Package Code E), with exposed thermal pad and RoHS-compliant matte tin finish. Pin 1 is /CS; Pin 2 is DO (IO1); Pin 3 is /WP (IO2); Pin 4 is GND; Pin 5 is DI (IO0); Pin 6 is CLK; Pin 7 is /HOLD or /RESET (IO3); Pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS (Pin 1) | Chip Select Input | Active-low enable; high-impedance DO output when deasserted; must transition high→low after power-up to accept commands |
| DO (IO1) (Pin 2) | Data Output / I/O Line 1 | Unidirectional output in Standard SPI; bidirectional in Dual/Quad modes; shares function with IO1 per JEDEC JESD251 |
| /WP (IO2) (Pin 3) | Write Protect Input / I/O Line 2 | Hardware lock for status register; repurposed as IO2 when QE=1; active-low protection |
| GND (Pin 4) | Ground Reference | Primary return path for VCC and I/O signals; requires low-inductance PCB connection to minimize noise coupling |
| DI (IO0) (Pin 5) | Data Input / I/O Line 0 | Unidirectional input in Standard SPI; bidirectional in Dual/Quad modes; carries instructions, addresses, and data |
| CLK (Pin 6) | Serial Clock Input | Edge-triggered timing reference; rising edge for input sampling, falling edge for output valid; max 104 MHz |
| /HOLD or /RESET (IO3) (Pin 7) | Hold or Reset Input / I/O Line 3 | Pauses ongoing operation when low; resets device when asserted if configured as /RESET; disabled in Quad mode |
| VCC (Pin 8) | Power Supply | 2.7–3.6 V supply; requires local 1 µF ceramic decoupling adjacent to Pin 8 |
Key Features
| Feature | Design Value |
|---|---|
| Quad Peripheral Interface (QPI) | Reduces instruction overhead to 2 clocks per command, enabling true XIP execution without external cache |
| Erase/Program Suspend-Resume | Allows background firmware update while servicing real-time interrupts via 75h/7Ah commands |
| 64-bit Unique ID | Enables device-specific secure boot binding and anti-cloning in certified IoT deployments |
| Three 256-byte Security Registers | OTP-lockable storage for cryptographic keys, calibration data, or license tokens with hardware-enforced write protection |
| SFDP Register Compliance | Self-describing flash parameters (timing, voltage, erase sizes) accessible via 5Ah command for automatic driver initialization |
| Continuous Read with Wrap | Supports burst reads up to 64 bytes with automatic address wrap, minimizing CPU polling overhead in streaming applications |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
Use Scenario: Storing firmware images and configuration tables for programmable logic controllers deployed in factory automation cabinets with no field service access. IC Role / Device Role / Timing Role: Nonvolatile code storage with XIP capability; executes directly from flash via Quad SPI interface to reduce external RAM footprint. Use Value: 4KB sector erase enables delta updates without full reflash; 20-year data retention ensures 15+ year deployment without data loss. | Use Scenario: Holding boot code and sensor calibration data for radar processing units in autonomous driving ECUs requiring AEC-Q100 Grade 2 qualification. IC Role / Device Role / Timing Role: Primary boot memory mapped to ARM Cortex-R5 core; accessed via QPI at 104 MHz for sub-100ms cold boot time. Use Value: Hardware write protection (/WP pin + BP bits) prevents accidental corruption during ECU reset sequences; -40°C to +85°C rating matches under-hood thermal envelope. |
| Smart Meter Secure Parameter Vault | Wireless Gateway OTA Update Cache |
Use Scenario: Storing tariff schedules, encryption keys, and tamper logs in ANSI C12.22-compliant electricity meters with physical security constraints. IC Role / Device Role / Timing Role: Secure nonvolatile storage with OTP-locked security registers; accessed via Standard SPI during meter initialization and key derivation. Use Value: Three 256-byte security registers allow separation of AES-256 keys, HMAC secrets, and device-unique IVs; CMP and SRP bits prevent runtime modification. | Use Scenario: Caching downloaded firmware patches for Wi-Fi/BLE gateways before atomic application to main application flash. IC Role / Device Role / Timing Role: High-throughput temporary storage buffer; leverages 50 MB/s continuous read to feed OTA decompression engine without stalling. Use Value: 100,000 erase cycles support daily patch validation over 27 years; 4KB sectors align with OTA chunk size for minimal wear leveling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX25L25635FMI-10G | Same density and WSON-8 package; supports only Standard/Dual SPI (no QPI); 80 MHz max clock | Lacks Quad I/O and QPI modes; unsuitable for XIP-critical designs requiring >30 MB/s throughput | Select when QPI/XIP is unnecessary and cost sensitivity outweighs performance headroom |
| S25FL256SAGMFI000 | 256 M-bit, 104 MHz Quad SPI, but uses different status register layout and lacks SFDP compliance | Requires custom driver adaptation; no auto-discovery of timing/erase parameters | Choose only if existing Cypress-compatible firmware stack eliminates porting effort |
Compared with MX25L25635FMI-10G and S25FL256SAGMFI000, the W25Q256FVEJQ TR delivers QPI mode for reduced instruction latency, JEDEC SFDP for plug-and-play driver initialization, and unified security register architecture - making it optimal for new designs prioritizing configurability, security, and XIP efficiency.
Availability
W25Q256FVEJQ TR is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS modules, smart utility meters, and wireless gateway OTA caching requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for W25Q256FVEJQ 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 manufacturer specializing in specialty DRAM, mobile DRAM, and serial flash memory solutions since 1987.
The W25Q series targets embedded systems requiring high-speed, secure, and flexible nonvolatile storage - designed specifically for code shadowing, XIP execution, and firmware update resilience in resource-constrained environments.
FAQ
What is the package type and pin count of the W25Q256FVEJQ TR?
The W25Q256FVEJQ TR uses an 8-pad WSON 8×6-mm package (Package Code E) with exposed thermal pad. It has eight terminals: /CS, DO (IO1), /WP (IO2), GND, DI (IO0), CLK, /HOLD or /RESET (IO3), and VCC. This matches the JEDEC MO-241AC standard and is distinct from SOIC-16 or TFBGA variants of the same family.
Does the W25Q256FVEJQ TR support Quad SPI and QPI modes?
Yes, the W25Q256FVEJQ TR supports both Quad SPI and QPI modes. Quad SPI requires setting the non-volatile Quad Enable (QE) bit in Status Register-2. QPI mode is entered using instruction 38h and provides 2-clock instruction encoding, reducing protocol overhead versus standard SPI - a capability confirmed in the official Winbond datasheet revision I.
How is hardware write protection implemented on the W25Q256FVEJQ TR?
Hardware write protection on the W25Q256FVEJQ TR uses the /WP pin (Pin 3) in conjunction with Block Protect (BP0–BP3), Top/Bottom (TB), Complement (CMP), and Status Register Protect (SRP0/SRP1) bits. When /WP is driven low and SRP bits are set, writes to protected sectors and status registers are blocked - independent of software commands. This dual-layer mechanism is validated in Section 6.2 and Figure 58 of the datasheet.
What is the maximum clock frequency supported by the W25Q256FVEJQ TR in Quad I/O mode?
The W25Q256FVEJQ TR supports up to 104 MHz on the Serial Clock (CLK) pin in all modes. In Quad I/O Fast Read (6Bh/6Ch), this yields an effective data rate of 416 MB/s (104 MHz × 4 lines). This value is specified in Section 2 (Features) and Table 9.6 (AC Electrical Characteristics) of the February 2016 datasheet revision I.
Can the W25Q256FVEJQ TR be used for execute-in-place (XIP) applications?
Yes, the W25Q256FVEJQ TR supports true XIP operation via Continuous Read Mode with as few as 8 clocks of instruction overhead and Quad I/O or QPI interfaces. Its 104 MHz clock, low-latency Fast Read Quad I/O (6Bh), and 4KB sector architecture enable deterministic code fetch timing - explicitly cited in Section 1 (General Descriptions) and Section 2 (Features) of the datasheet.
W25Q256FVEJQ TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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, QPI
- Clock Frequency:
- 104 MHz
- Write Cycle Time - Word, Page:
- 50µs, 3ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (8x6)
W25Q256FVEJQ TR FAQ
1.How can I place an order for W25Q256FVEJQ TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q256FVEJQ TR 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 W25Q256FVEJQ TR reliable?
The price and inventory of W25Q256FVEJQ TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q256FVEJQ TR is usually 5 days.
3.What payment methods are accepted for W25Q256FVEJQ TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q256FVEJQ TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q256FVEJQ TR?
W25Q256FVEJQ TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q256FVEJQ TR 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 W25Q256FVEJQ TR?
For technical support, including W25Q256FVEJQ TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q256FVEJQ TR requirements.
6.How does Aetrix verify that W25Q256FVEJQ TR is sourced from the original manufacturer or authorized distributors?
All W25Q256FVEJQ TR 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 W25Q256FVEJQ TR meets industry standards.
7.What is the process for return or replacement of W25Q256FVEJQ TR?
All W25Q256FVEJQ TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q256FVEJQ TR, 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 W25Q256FVEJQ TR part is unused and in its original packaging.
Return procedure for W25Q256FVEJQ TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
W25Q256FVEJQ TR Tags
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