Winbond Electronics Corporation W25Q256JVBJM

Overview

W25Q256JVBJM from Winbond is a 256 M-bit (32 MB) serial NOR flash memory IC supporting Dual/Quad SPI, QPI, and Double Transfer Rate (DTR) read modes, operating from 2.7V to 3.6V with -40°C to +105°C industrial-plus temperature range. It features 131,072 × 256-byte programmable pages, 4 KB uniform sector erase, and hardware /WP and /HOLD pins - used in embedded boot code storage, firmware update storage, and XIP-capable microcontroller systems.

For engineers reviewing the W25Q256JVBJM datasheet, W25Q256JVBJM pinout, W25Q256JVBJM application, or W25Q256JVBJM equivalent, key selection criteria include 133 MHz SPI clock support, DTR read capability, 4-byte addressing mode, JEDEC SFDP register compliance, and 8-pad WFLGA 6×5-mm (Package Code M) footprint compatibility.

Technical Context

The W25Q256JVBJM implements a flexible SPI/QPI command architecture with volatile/non-volatile status register control, enabling dynamic switching between 3- and 4-byte address modes via B7h/E9h instructions and QPI entry/exit via 38h/FFh. Its dual-mode /HOLD or /RESET pin (configurable via Status Register) supports both pause-and-resume operation and hardware reset without external logic.

It integrates three 256-byte one-time-programmable (OTP) security registers, 64-bit unique ID, and programmable output driver strength (DRV1/DRV0), while supporting Erase/Program Suspend & Resume for real-time system responsiveness during background flash operations.

Key Specifications

Pinout & Package

W25Q256JVBJM uses the 8-pad WFLGA 6×5-mm package (Package Code M), with exposed thermal pad on underside for enhanced thermal dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial NOR flash memory applications.

Compared with MX25L25645GMI-08G and S25FL256SAGMFV010, the W25Q256JVBJM delivers broader interface flexibility (SPI/QPI/DTR), higher clock speed (133 MHz), and integrated security features (unique ID, OTP registers) in an industry-standard 8-pad WFLGA package - making it optimal for new designs requiring scalable, secure, and high-throughput serial flash.

Availability

W25Q256JVBJM is available at Aetrix Electronics and suitable for industrial control systems, automotive telematics modules, and medical diagnostic equipment requiring stable component supply, extended temperature operation, and long-term lifecycle assurance.

Supply support for W25Q256JVBJM 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 for embedded, communications, and consumer markets.

The W25Q series is designed specifically for high-performance, space-constrained embedded systems requiring robust code storage, secure firmware updates, and seamless XIP execution - targeting industrial, automotive, and networking applications.

FAQ

What is the package type and footprint of W25Q256JVBJM?

W25Q256JVBJM uses the 8-pad WFLGA 6×5-mm package (Package Code M), with bottom-exposed thermal pad. Its pinout matches the standard 8-pin serial flash layout: /CS, DO (IO1), /WP (IO2), GND, DI (IO0), CLK, /HOLD or /RESET (IO3), and VCC. This footprint is compatible with automated optical inspection and reflow processes in high-volume manufacturing.

Does W25Q256JVBJM support 4-byte addressing, and how is it enabled?

Yes, W25Q256JVBJM supports 4-byte addressing to access its full 32 MB capacity. It is enabled by issuing the Enter 4-Byte Address Mode instruction (B7h). The ADP bit in Status Register-1 determines whether the device powers up in 3- or 4-byte mode. Once enabled, all subsequent read/write/erase commands use 32-bit addresses - critical for large firmware images exceeding 16 MB.

How does the /HOLD or /RESET pin function on W25Q256JVBJM?

On W25Q256JVBJM, pin 7 functions as either /HOLD (active-low pause) or /RESET (hardware reset), depending on the HOLD/RST bit in Status Register-1 and the package type. In the 8-pad WFLGA (M), it defaults to /HOLD in Standard/Dual SPI; /RESET is only available when explicitly configured and supported by the host. In SOIC/TFBGA packages, /RESET is a dedicated pin independent of configuration.

What security features are implemented in W25Q256JVBJM?

W25Q256JVBJM includes multiple hardware-enforced security features: a factory-programmed 64-bit unique ID (readable via 4Bh), three 256-byte OTP-locked security registers (programmable via 42h, readable via 48h), software/hardware write protection (BP bits, /WP pin), and status register lock bits (SRP/SRL). These enable secure key storage, device authentication, and tamper-resistant firmware partitioning.

Can W25Q256JVBJM be used for Execute-in-Place (XIP) applications?

Yes, W25Q256JVBJM supports true XIP operation via Continuous Read Mode with Fast Read Quad I/O (EBh/EDh) and DTR instructions. With 133 MHz clock and Quad I/O, it achieves up to 532 MB/s effective throughput and minimal instruction overhead (≤8 clocks per 24-bit address), enabling low-latency instruction fetch directly from flash - widely adopted in Cortex-M7/M33 and RISC-V SoCs.