W25Q256JWBIQ

The W25Q256JWBIQ is Winbond’s 256‑Mbit serial NOR flash memory. It provides non‑volatile storage for firmware or data in embedded systems and is SPI‑compatible.
Key points
- Capacity and voltage: ~32 MB of storage powered typically from 3.3 V.
- Interface: SPI-compatible; supports standard SPI reads, fast reads, and higher‑throughput dual/quad I/O modes (and QPI on supported variants).
- Organization and operations: 8‑bit I/O; page program (typically 256 bytes); sector erase (4 KB) and larger block/chip Erase options.
- Features: security and protection registers, deep power‑down, resume from DP, and data retention typically on the order of decades; endurance around 100k P/E cycles (device wear).
- Temperature and packaging: industrial-grade option (-40°C to 85°C, suffix “IQ”); available in common 8‑pin packages (e.g., SOIC/VSON).
Typical uses
- Firmware storage and execution in place (XIP), boot ROMs, application code storage, data logging.
Note: Exact timings, voltage ranges, supported modes, and package options vary by part revision; consult the latest W25Q256JWBIQ datasheet for precise specs.

Key features of W25Q256JWBIQ (Winbond 256-Mbit serial flash):
- Density and packaging: 256 Mb (32 MB) serial flash in an 8-pin package.
- Supply voltage: 2.7–3.6 V (typical 3.3 V).
- Memory organization: 256-byte pages; 4 KB sectors; 64 KB blocks; chip erase option.
- Interface: SPI core with single, dual, and quad I/O modes (Quad SPI; supports fast read and higher‑throughput modes).
- Speed: fast read up to high MHz operation (typical up to 104 MHz clock).
- Endurance and retention: ~100,000 program/erase cycles; data retention typically ~20 years.
- Power management: low-power modes including Deep Power-Down with wake via command.
- Security and protection: software and hardware write protection, status register (WIP/WEL), and protection mechanisms for regions.
- Identification and security features: JEDEC ID and 64‑bit unique ID support.
- Operating range: -40°C to 85°C (industrial grade).
- Typical applications: firmware/BIOS storage, boot memory, code protection in embedded systems.
Note: exact supported modes (e.g., QPI) and block/sector configuration can vary by package revision.

8-pin SOP (SOIC8) package.

- Pin count: 8 pins (SOP-8).
- Function: 256‑Mbit serial SPI flash memory (nonvolatile storage for firmware/data). Interface uses SPI: CS, DI/MOSI, DO/MISO, CLK, plus WP, HOLD, VCC, GND.

- Manufacturer: Winbond Electronics Corporation.
- What kind of company: A Taiwanese semiconductor company that designs and manufactures memory integrated circuits (notably NOR flash, DRAM, SRAM) for global markets.

W25Q256JWBIQ is a 256‑Mbit serial NOR Flash (Quad I/O) used for non-volatile storage in embedded systems. Common applications include:
- Firmware storage/execution for MCUs/SoCs
- Bootloaders and secure boot storage
- Firmware updates and recovery
- Data logging in embedded devices
- IoT devices, consumer electronics (set‑top boxes, cameras, printers)
- Automotive and industrial controllers
- Networking equipment (routers, switches)

Equivalent 256-Mbit SPI flash parts include:
- Macronix MX25L256 (MX25L25645G)
- Micron N25Q256A
- Spansion/Cypress S25FL256S
- GigaDevice GD25Q256
- Puya P25Q256
- SST SST25VF256 (and SST25WF256)
- Eon EN25Q256
Note: exact pinout, voltage (≈3V), and timing must be verified for interchangeability.