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Winbond Electronics Corporation W25Q256JVEJM TR
- Part No.:
- W25Q256JVEJM TR
- Manufacturer:
- Winbond Electronics Corporation
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
W25Q256JVEJM TR.pdf
- Description:
- IC FLASH 256MBIT SPI/QUAD 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,135
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Product details
Overview
W25Q256JVEJM TR from Winbond is a 256M-bit (32MB) serial NOR flash memory IC supporting Dual/Quad SPI, QPI, and DTR read modes with 133MHz clock rate, 4KB uniform sector architecture, and industrial temperature range (–40°C to +85°C). It serves as non-volatile code/data storage in microcontroller boot systems, firmware update storage, and embedded XIP applications.
For engineers reviewing the W25Q256JVEJM TR datasheet, W25Q256JVEJM TR pinout, W25Q256JVEJM TR application, or W25Q256JVEJM TR equivalent, key selection factors include 4-byte addressing support, Quad Enable (QE) bit configuration, /HOLD vs /RESET pin behavior in 8-pin packages, and JEDEC SFDP register compatibility for auto-configuration.
Technical Context
The W25Q256JVEJM TR implements a flexible SPI-compatible interface with mode-selectable operation: Standard SPI (DI/DO), Dual I/O (IO0/IO1), Quad I/O (IO0–IO3), and QPI (4-bit bus width). Its internal architecture supports both 3-byte and 4-byte address modes, with ADP bit in Status Register-2 determining power-up default addressing.
It integrates volatile/non-volatile status registers controlling write protection (BP0–BP3, TB, CMP), quad enable (QE), output driver strength (DRV1/DRV0), and /HOLD or /RESET function mapping. Erase/program suspend/resume capability enables concurrent background operations without interrupting host access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 M-bit (32 MB), organized as 131,072 × 256-byte pages |
| Operating Voltage | 2.7 V to 3.6 V - compatible with standard 3.3 V logic rails and low-power MCU domains |
| Max Clock Frequency | 133 MHz - enables 532 MB/s effective throughput in Quad I/O DTR mode |
| Erase Granularity | 4 KB sectors (8,192 total), 32 KB blocks (2,048), 64 KB blocks (1,024) - supports fine-grained firmware partitioning |
| Data Retention | 20 years - ensures long-term reliability in unattended industrial deployments |
| Endurance | 100,000 program/erase cycles per sector - suitable for frequent OTA update scenarios |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade operation without derating |
| Interface Modes | Standard/Dual/Quad SPI, QPI, DTR - provides backward compatibility and bandwidth scalability |
Pinout & Package
W25Q256JVEJM TR uses the 8-pad WFLGA 6×5-mm package (Package Code M), with exposed pad for thermal dissipation and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /CS | Chip Select Input | Active-low enable signal; high-impedance DO during deselect; required high-to-low transition after power-up to accept instructions |
| DO (IO1) | Data Output / Bidirectional I/O | Unidirectional output in Standard SPI; bidirectional data lane 1 in Dual/Quad modes; requires QE=1 for Quad use |
| /WP (IO2) | Write Protect Input / Bidirectional I/O | Hardware write-protection when low; repurposed as IO2 in Quad mode (QE=1); not available as /WP in that configuration |
| GND | Ground Reference | Primary return path for all I/O and core logic; must be low-impedance connection to minimize noise coupling |
| DI (IO0) | Data Input / Bidirectional I/O | Unidirectional input in Standard SPI; bidirectional data lane 0 in Dual/Quad modes; essential for instruction/address loading |
| CLK | Serial Clock Input | Rising-edge sampled input for all write operations; falling-edge sampled for reads; timing-critical for setup/hold compliance |
| /HOLD or /RESET (IO3) | Hold or Reset Input / Bidirectional I/O | Configurable via Status Register: /HOLD active-low pause in SPI mode; /RESET active-low hardware reset (only functional when QE=0) |
| VCC | Power Supply | 2.7–3.6 V supply; decoupling capacitor (≥100 nF) required near pin to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| DTR Read Support | Enables double-data-rate sampling on CLK edges - doubles effective throughput without increasing clock frequency |
| 4-Byte Address Mode | Required for >16 MB addressing; entered via B7h instruction; ADP bit sets default at power-up |
| Erase/Program Suspend | Allows host to pause ongoing erase/program and service urgent reads/writes - critical for real-time responsiveness |
| 64-Bit Unique ID | Factory-programmed per-device serial number - enables secure device authentication and firmware binding |
| SFDP Register | JEDIC-standard parameter table accessible via 5Ah command - enables automatic driver configuration without hard-coded timing |
| Security Registers | Three 256-byte OTP-lockable regions - supports encrypted key storage and secure boot credential isolation |
Applications
| Boot Code Storage | Firmware Update Storage |
|---|---|
Use Scenario: Storing primary bootloader and application firmware executed directly by ARM Cortex-M or RISC-V MCUs. IC Role / Device Role / Timing Role: Non-volatile XIP (execute-in-place) memory mapped via SPI, delivering deterministic instruction fetch latency. Use Value: Eliminates need for external RAM copy; reduces BOM count and boot time; leverages 4KB sector granularity for atomic firmware updates. | Use Scenario: Holding field-upgradable firmware images in industrial gateways and medical devices requiring A/B partitioning. IC Role / Device Role / Timing Role: Dual-bank storage with independent sector locking - enables safe over-the-air (OTA) updates without system downtime. Use Value: Supports erase-suspend during active execution; guarantees atomic commit via status register protection and unique ID verification. |
| Configuration & Calibration Data | Secure Key Storage |
Use Scenario: Persisting sensor calibration coefficients, network credentials, and user preferences in automotive ECUs and smart meters. IC Role / Device Role / Timing Role: Parameter storage with hardware write-protection (/WP pin + BP bits) and software lock (SRP/SRL bits). Use Value: Prevents accidental or malicious corruption; enables field-serviceable recalibration without full reflash. | Use Scenario: Isolating cryptographic keys used in TLS handshakes, secure boot, and hardware attestation in IoT edge nodes. IC Role / Device Role / Timing Role: OTP-locked Security Registers (3 × 256 bytes) accessed only via dedicated 42h/48h commands. Use Value: Physically separates sensitive keys from main firmware; prevents extraction via standard read commands or debugger access. |
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 |
|---|---|---|---|
| MX25L25645GMI-10G | Same density (256Mb), 3.3V, SOIC-16 package; lacks DTR support and 4-byte address mode; no SFDP register | Requires fixed 3-byte addressing; no auto-configuration; lower max throughput (80 MHz clock) | Choose when legacy SPI-only interface suffices and board layout already accommodates SOIC-16 footprint. |
| IS25LP256D-JBLE | 256Mb, 133MHz, DTR and 4-byte support; includes octal DTR mode; different security register structure and QE bit location | Higher bandwidth potential with octal mode; distinct command set for security functions; requires updated driver initialization | Choose for future-proofing with octal-ready controllers; verify SFDP parsing and security register lock sequence compatibility. |
Compared with W25Q256JVEJM TR, MX25L25645GMI-10G offers simpler integration but sacrifices DTR performance and configurability, while IS25LP256D-JBLE extends bandwidth and flexibility at the cost of driver adaptation effort and different security implementation.
Availability
W25Q256JVEJM TR is available at Aetrix Electronics and suitable for industrial control systems, automotive telematics modules, and medical diagnostic equipment requiring stable component supply across extended lifecycle programs.
Supply support for W25Q256JVEJM 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 DRAM, mobile DRAM, and serial flash memory solutions since 1987.
The W25Q series targets high-reliability embedded systems needing fast, secure, and configurable non-volatile storage - optimized for XIP, OTA updates, and industrial temperature operation.
FAQ
What is the package type and pin count of the W25Q256JVEJM TR?
The W25Q256JVEJM TR uses an 8-pad WFLGA (Wafer-Level Fine-Pitch Grid Array) package measuring 6 mm × 5 mm (Package Code M). It has eight terminals: /CS, DO (IO1), /WP (IO2), GND, DI (IO0), CLK, /HOLD or /RESET (IO3), and VCC. This compact footprint supports high-density PCB layouts while maintaining thermal performance via the exposed pad.
Does the W25Q256JVEJM TR support 4-byte addressing, and how is it enabled?
Yes, the W25Q256JVEJM TR supports both 3-byte and 4-byte addressing modes. The 4-byte mode is enabled by issuing the Enter 4-Byte Address Mode instruction (B7h). The ADP bit in Status Register-2 determines whether the device powers up in 3-byte or 4-byte mode. This capability is essential for accessing the full 32 MB address space beyond the 16 MB limit of 3-byte addressing.
How does the /HOLD pin function differ from the /RESET pin on the W25Q256JVEJM TR?
On the W25Q256JVEJM TR, the /HOLD pin (mapped to IO3) allows pausing ongoing SPI transactions while /CS remains low, placing DO in high-impedance state. The /RESET pin is only available in SOIC-16 and TFBGA packages; in the 8-pin WFLGA package (W25Q256JVEJM TR), /RESET functionality is conditional: it activates only when QE = 0 and the HOLD/RST bit in Status Register-3 is set. When QE = 1, IO3 becomes dedicated to Quad I/O and neither /HOLD nor /RESET is active.
What is the role of the Quad Enable (QE) bit in the W25Q256JVEJM TR, and where is it located?
The Quad Enable (QE) bit is a non-volatile bit in Status Register-2 (bit 1) of the W25Q256JVEJM TR. When QE = 1, the /WP and /HOLD pins are reassigned as IO2 and IO3 to enable true Quad SPI operation. This bit must be set before issuing Quad I/O instructions (e.g., 6Bh Fast Read Quad Output). Its volatility setting (volatile/non-volatile) is controlled by the SRP bits, allowing persistent configuration across power cycles when locked.
Can the W25Q256JVEJM TR be used for execute-in-place (XIP) applications, and what features support this?
Yes, the W25Q256JVEJM TR is explicitly designed for XIP operation. Its Continuous Read Mode minimizes instruction overhead (as few as 8 clocks to read a 24-bit address), and DTR read capability doubles data rate without raising clock frequency. Combined with fast Quad I/O access (up to 532 MB/s effective), uniform 4KB sectors for atomic updates, and low-latency status polling, it delivers deterministic instruction fetch timing required for direct CPU execution from flash.
W25Q256JVEJM TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Winbond Electronics Corporation
- Series:
- SpiFlash®
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 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)
W25Q256JVEJM TR FAQ
1.How can I place an order for W25Q256JVEJM TR through Aetrix?
Please submit a Request for Quotation (RFQ) for W25Q256JVEJM 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 W25Q256JVEJM TR reliable?
The price and inventory of W25Q256JVEJM TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for W25Q256JVEJM TR is usually 5 days.
3.What payment methods are accepted for W25Q256JVEJM TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for W25Q256JVEJM TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for W25Q256JVEJM TR?
W25Q256JVEJM TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your W25Q256JVEJM 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 W25Q256JVEJM TR?
For technical support, including W25Q256JVEJM TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your W25Q256JVEJM TR requirements.
6.How does Aetrix verify that W25Q256JVEJM TR is sourced from the original manufacturer or authorized distributors?
All W25Q256JVEJM 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 W25Q256JVEJM TR meets industry standards.
7.What is the process for return or replacement of W25Q256JVEJM TR?
All W25Q256JVEJM TR units undergo pre-shipment inspection (PSI). If there is an issue with W25Q256JVEJM 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 W25Q256JVEJM TR part is unused and in its original packaging.
Return procedure for W25Q256JVEJM TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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