W25Q256FVEIQ

The W25Q256FVEIQ is Winbond’s 256-Mbit serial flash memory (W25Q family) designed for firmware storage and data logging in embedded systems. It uses a serial SPI interface with Quad I/O options for higher throughput.
Key points:
- Capacity and addressing: 256 Mbit (32 MB); supports standard SPI commands with 4-byte addressing for full memory access.
- Interface and speed: SPI-compatible; Quad I/O/Quad Output modes available for faster data transfer.
- Organization: 256-byte pages; 4 KB sectors; 64 KB and 256 KB blocks.
- Endurance and retention: non-volatile memory with typical flash endurance and long data retention.
- Features: JEDEC ID, status registers, hardware/ software write protection, deep power-down mode.
- Reliability and variants: available in industrial-grade versions; suitable for boot flash and firmware storage.
- Package: commonly 8-pin SOIC/WDF type.
Note: exact electrical specs (voltage range, timing, endurance) vary by variant; consult the Winbond datasheet for detailed parameters and supported commands.

The W25Q256FVEIQ uses an 8-pin SOP (SOIC-8) surface-mount package (RoHS-compliant).

- Pin count: 8 pins (SOP-8)
- Function: 256 Mbit serial flash memory with SPI interface (Winbond W25Q256FVEIQ). Pins:
- Pin 1: CS# (chip select)
- Pin 2: DO/MISO
- Pin 3: WP#
- Pin 4: GND
- Pin 5: DI/MOSI
- Pin 6: CLK (SCK)
- Pin 7: HOLD#
- Pin 8: VCC

- Manufacturer: Winbond Electronics Corporation.
- What kind of company: A Taiwan-based semiconductor company that designs and manufactures memory products (notably NOR flash and DRAM), supplying memory solutions for electronic devices.

W25Q256FVEIQ is a 256‑Mbit serial SPI flash memory used as nonvolatile storage in embedded systems. Typical applications:
- Firmware storage and boot code for microcontrollers/SoCs
- Firmware updates and bootloaders
- External storage for IoT devices, consumer electronics, set‑top boxes
- Data logging, calibration, and configuration storage in industrial/automotive systems
- Expanded program/data storage for network devices and other embedded platforms

Equivalents (256-Mbit SPI flash) include:
- Macronix MX25L25645G (and MX25L25635F)
- GigaDevice GD25Q256C
- Micron N25Q256A
- ISSI IS25LP256D
- Puya P25Q256H
Note: verify voltage (1.8V/3.3V), interface (SPI/DUAL/QUAD/QPI), timing, and package for pin compatibility.