Winbond Electronics Corporation W25Q40BWSVIG

Overview

W25Q40BWSVIG from Winbond is a 4M-bit (512KB) 1.8V serial NOR flash memory IC supporting Standard, Dual, and Quad SPI interfaces. It delivers up to 320MHz equivalent data transfer via Quad I/O Fast Read (EBh), features uniform 4KB sector erase, 64KB block erase, and supports execute-in-place (XIP) for microcontroller code storage in space-constrained embedded systems.

For engineers reviewing the W25Q40BWSVIG datasheet, W25Q40BWSVIG pinout, W25Q40BWSVIG application, or W25Q40BWSVIG equivalent, key selection criteria include 1.65–1.95V supply compatibility, Quad Enable (QE) bit configuration, /WP and /HOLD pin reassignment in Quad mode, and JEDEC-compliant 64-bit unique ID support.

Technical Context

The W25Q40BWSVIG implements a SPI command set compliant with Modes 0 and 3, with dedicated status registers (SR-1/SR-2) controlling write protection, sector locking, and Quad SPI enablement. Its architecture includes a 256-byte page buffer, hardware-assisted erase suspend/resume, and dual I/O/quad I/O pin multiplexing where IO0–IO3 share physical pins with DI, DO, /WP, and /HOLD.

It supports continuous read mode with ≤8-clock instruction overhead for true XIP operation, and integrates volatile/non-volatile status bits including Quad Enable (QE), Block Protect (BP2–BP0), Top/Bottom (TB), and Security Register Lock (LB3–LB0), all configurable via Write Status Register (01h) and Read Status Register (05h/35h).

Key Specifications

Pinout & Package

W25Q40BWSVIG uses an 8-pin VSOP 150-mil (package code SV) with gull-wing leads, 1.27 mm pitch, and 3.9 mm × 4.9 mm body size - optimized for automated SMT assembly and thermal reliability in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with W25Q40BWSVIG, W25Q40EWSSIG extends temperature range and robustness for mission-critical use, while AT25SF041-SSHD-B trades security and uniqueness for higher peak bandwidth - neither is pin-compatible without layout revision due to differing /HOLD and /WP behavior in Quad mode.

Availability

W25Q40BWSVIG is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical sensor data logging, automotive ADAS bootloader hosting, and smart home gateway OTA staging requiring stable component supply across multi-year production cycles.

Supply support for W25Q40BWSVIG 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 SPI NOR/NAND flash, RAM, and mobile DRAM, serving industrial, automotive, and communications markets since 1987.

The W25Q series targets embedded systems needing high-speed, low-voltage serial flash with advanced security and XIP capability - designed specifically for code storage, firmware updates, and parameter retention in resource-constrained MCUs.

FAQ

What is the operating voltage range for W25Q40BWSVIG?

W25Q40BWSVIG operates from 1.65 V to 1.95 V. This narrow 1.8V nominal range ensures compatibility with modern ultra-low-power microcontrollers and eliminates the need for external voltage translation. Operation outside this range may cause undefined behavior or permanent damage. The device includes internal voltage monitoring that holds reset until VCC exceeds VWI, and enforces a tPUW delay before accepting write commands after power-up.

Does W25Q40BWSVIG support Quad SPI mode, and how is it enabled?

Yes, W25Q40BWSVIG supports Quad SPI mode using instructions like Fast Read Quad I/O (EBh). Activation requires setting the Quad Enable (QE) bit in Status Register-2 via Write Status Register (01h). Once QE=1, pins /WP and /HOLD become IO2 and IO3 respectively. The QE bit is non-volatile and persists across power cycles, but must be verified after reset since some host bootloaders clear status registers.

How many program/erase cycles does W25Q40BWSVIG guarantee?

W25Q40BWSVIG guarantees a minimum of 100,000 program/erase cycles per sector. This endurance rating applies uniformly across all 128 sectors and is validated under specified voltage, temperature, and timing conditions. Field data shows typical wear leveling extends usable life beyond 500,000 cycles when combined with host-managed wear algorithms - critical for firmware update partitions in long-lifecycle products.

What package type is used by W25Q40BWSVIG?

W25Q40BWSVIG uses an 8-pin VSOP 150-mil package (package code SV), measuring 3.9 mm × 4.9 mm with 1.27 mm lead pitch. This gull-wing surface-mount variant offers superior thermal dissipation and solder joint reliability compared to SOIC, while maintaining compatibility with standard 0.5 mm stencil apertures and reflow profiles defined in J-STD-020.

Can W25Q40BWSVIG be used for execute-in-place (XIP) applications?

Yes, W25Q40BWSVIG supports true XIP via Continuous Read Mode, which reduces instruction overhead to as few as 8 clocks per 24-bit address access. When configured with Quad SPI and Fast Read Quad I/O (EBh), it delivers deterministic latency and sustained 320 MB/s throughput - enabling ARM Cortex-M7/M33 and RISC-V cores to execute firmware directly from flash without RAM shadowing, reducing BOM cost and power consumption.