Winbond Electronics Corporation W25Q128FVCIF

Overview

W25Q128FVCIF from Winbond is a 128M-bit (16MB) serial NOR flash memory IC supporting Standard/Dual/Quad SPI and QPI interfaces, operating at up to 104MHz clock frequency with 4KB uniform sector erase granularity, 2.7–3.6V single supply, and -40°C to +85°C industrial temperature range - used for code storage, XIP execution, and firmware parameter retention in embedded microcontrollers.

For engineers reviewing the W25Q128FVCIF datasheet, W25Q128FVCIF pinout, W25Q128FVCIF application, or W25Q128FVCIF equivalent, key selection criteria include Quad I/O enable status (QE bit), /HOLD vs /RESET pin configuration per package, 4KB sector protection granularity, continuous read mode latency, and JEDEC SFDP register compatibility for automatic configuration.

Technical Context

The W25Q128FVCIF implements a flexible SPI-compatible command set with hardware- and software-controlled write protection, including volatile/non-volatile BP bits, TB/SEC/CMP flags, and SRP lock bits. Its architecture supports simultaneous erase/program suspend-resume operations and configurable IO0–IO3 pin multiplexing based on QE bit state.

It delivers true execute-in-place (XIP) capability via Continuous Read Mode with ≤8-clock instruction overhead and QPI's reduced command overhead, enabling efficient memory-mapped access without external buffering. The device uses a 65,536 × 256-byte page array with 4KB/32KB/64KB erase blocks and chip-erase support.

Key Specifications

Pinout & Package

W25Q128FVCIF is supplied in an 8-pin SOIC 208-mil package (Package Code S), with pins arranged as follows:

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX25L12833FZC-10G and S25FL128SAGMFI000, the W25Q128FVCIF provides QPI acceleration and JEDEC SFDP for plug-and-play configuration, while retaining compact 8-pin SOIC compatibility - making it optimal for cost-sensitive, space-constrained designs requiring high-speed XIP and field-upgrade resilience.

Availability

W25Q128FVCIF is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and consumer IoT gateways requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for W25Q128FVCIF 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 high-performance embedded systems requiring fast, secure, and flexible code storage - designed specifically for XIP execution, OTA firmware updates, and robust parameter retention under extended temperature and endurance requirements.

FAQ

What interface protocols does the W25Q128FVCIF support?

The W25Q128FVCIF supports Standard SPI, Dual I/O SPI, Quad I/O SPI, and Quad Peripheral Interface (QPI). QPI mode requires setting the Quad Enable (QE) bit in Status Register-2 and is only available when /WP and /HOLD pins are repurposed as IO2 and IO3. All modes operate up to 104 MHz clock frequency, delivering up to 416 MHz equivalent bandwidth in Quad I/O mode. The W25Q128FVCIF also supports JEDEC-standard SFDP for automatic configuration discovery.

How is write protection implemented on the W25Q128FVCIF?

Write protection on the W25Q128FVCIF combines hardware and software methods: the /WP pin (active low) protects the status register when QE=0; software-configurable bits (BP2–BP0, TB, SEC, CMP, SRP0/SRP1) in Status Registers 1–3 provide volatile or non-volatile locking of 4KB sectors or larger blocks. The W25Q128FVCIF also supports individual sector lock/unlock commands (36h/39h) and global lock (7Eh), with OTP-locked security registers for immutable key storage.

What package type is used for the W25Q128FVCIF?

The W25Q128FVCIF uses an 8-pin SOIC 208-mil package (Package Code S), with standard pinout: /CS (1), DO/IO1 (2), /WP/IO2 (3), GND (4), DI/IO0 (5), CLK (6), /HOLD or /RESET/IO3 (7), VCC (8). This footprint is pin-compatible with other 8-pin SPI flash devices and supports reflow soldering per J-STD-020. The 'CIF' suffix denotes industrial temperature grade (-40°C to +85°C) and lead-free, halogen-free construction.

Does the W25Q128FVCIF support execute-in-place (XIP) operation?

Yes, the W25Q128FVCIF supports true execute-in-place (XIP) via Continuous Read Mode, which reduces instruction overhead to as few as 8 clock cycles for address setup and enables seamless wrap-around reads (8/16/32/64-byte). Combined with QPI's reduced command latency and 104 MHz clock support, the W25Q128FVCIF delivers deterministic, high-bandwidth code fetch performance comparable to parallel flash - eliminating need for external RAM caching in many MCU applications.

What is the purpose of the /HOLD and /RESET functions on pin 7 of the W25Q128FVCIF?

On the W25Q128FVCIF's 8-pin SOIC package, pin 7 serves as /HOLD (when QE=0) to pause ongoing SPI transfers without deselecting the device, or as /RESET (when QE=0 and HOLD/RST bit = 1) to force internal state reset. When QE=1, pin 7 becomes IO3 for Quad I/O operation and neither /HOLD nor /RESET is available. The dedicated /RESET function is only guaranteed on 16-pin SOIC variants; for W25Q128FVCIF, software reset (66h/99h) is recommended for reliable reset control.