MX25U25673GMI40

MX25U25673GMI40 is Macronix’s 256‑Mbit serial flash memory in an 8‑pin package. It uses a SPI interface (standard, dual/quad SPI in some modes) and runs from a 2.7–3.6 V supply, with an industrial temperature range (-40 to +85 °C). The “40” in the part number indicates a maximum clock of 40 MHz.
Key points:
- Capacity and addressing: 256 Mbit (32 MB) with 4‑byte addressing to access full capacity.
- Memory organization: 256‑byte page size; 4 KB sectors; 64 KB blocks; chip erase available.
- Operations: page program, sector/block/chip erase, read, fast read; write enable/disable; supports power‑down and resume features.
- Performance: up to 40 MHz read/IO modes; supports fast read and, in applicable variants, dual/quad I/O.
- Protection/features: typical security/protection registers and write protection options; WP# and HOLD# signals on standard packages.
- Applications: firmware/BIOS storage, boot memory for microcontrollers, embedded systems requiring reliable, low‑cost nonvolatile storage.
For exact timing, voltages, and command set (opcodes, status bits, timing parameters), refer to the MX25U25673GMI40 datasheet.

Key features of MX25U25673GMI40:
- 256-Mbit (32 MB) serial flash memory
- Operating voltage: 2.7–3.6 V (3.0 V typical)
- Maximum SPI clock: 40 MHz (supports standard, dual I/O, and quad I/O modes)
- 4-byte addressing mode for full memory map (necessary for > 16 MB)
- Page size: 256 bytes; supports 256-byte page program
- Erase options: 4 KB sectors; 32 KB and 64 KB blocks; chip erase
- Read modes: standard/fast read and high-speed dual/quad I/O reads
- Write enable latch (WEL) and WIP status bit; status register protections
- Power-down and deep power-down modes; hardware reset
- Block/sector protection features for security
- Package options: small 8-pin packages (e.g., SO8, WSON8)
- Industrial temperature range available
Note: exact block/sector sizes and protection granularity may vary by revision.

8-pin SOP (SOIC-8) package.

- Pin count: 8 pins (8-pin package such as SOIC-8/WSON-8).
- Function: 256-Mbit serial SPI NOR flash memory (MX25U25673), used to store firmware/data. Interface via standard SPI signals: CS, CLK, DI (MOSI), DO (MISO), plus WP# and HOLD#, plus VCC and GND.

Manufacturer: Macronix International Co., Ltd. (MXIC).
Kind of company: A Taiwanese semiconductor company that designs and manufactures non-volatile memory products, including NOR flash and related memory ICs for embedded, consumer, and automotive applications.

MX25U25673GMI40 is a 256-Mbit serial flash (Quad I/O) memory. Suitable applications:
- Boot code and firmware storage for MCUs/MPUs/SoCs
- External program/configuration memory for FPGAs and ASICs
- Data storage, logs and OTA firmware updates for IoT devices, wearables, and consumer electronics
- Automotive and industrial control systems needing robust non-volatile storage
- Networking equipment (routers/modems), printers, set-top boxes, and other embedded electronics

Equivalents (256 Mb SPI/NOR flash) from other vendors:
- Winbond W25Q256FV (also W25Q256JV)
- GigaDevice GD25Q256C (and GD25Q256E)
- Micron N25Q256A
- ISSI IS25LP256D
Notes: all are ~256 Mb Serial NOR Flash, 3V logic, with similar SPI/Quad SPI interfaces; verify exact voltage, timing, and package for your design.