MX84B040NF1

MX84B040NF1 is a Macronix serial NOR flash memory. It typically provides 4 Mbit of non-volatile storage accessed via SPI, used to hold firmware or configuration data for microcontrollers. It usually comes in an 8‑pin package (CS, CLK, SI, SO, WP, HOLD, Vcc, GND) and supports standard SPI operations: Read, Page Program (usually 256-byte pages), Sector/Block Erase, Chip Erase, and a status/config register with write protection. Some variants may offer enhanced modes (dual/quad I/O) and suspend/resume features. “NF1” denotes a specific package/voltage option within the MX84B0x family. For exact voltage range, timing specs, memory organization, and command set, refer to the MX84B040NF1 datasheet on Macronix’s website. If you need, share your board context and I can help map pins and typical initialization steps.

MX84B040NF1 is a 4-Mbit SPI NOR flash. Possible equivalents (same capacity and SPI interface) from other vendors:
- Winbond W25Q40BV / W25Q40DW
- GigaDevice GD25Q40B
- Macronix MX25L040
- ISSI 25LP040
- Puya P25Q40L
Verify exact package, voltage (3.3V etc.), timing, and pinout from the datasheets before substituting.

- Manufacturer: Macronix International Co., Ltd. (MXIC)
- What kind of company: A Taiwan-based semiconductor company that designs and manufactures non-volatile memory ICs (NOR/NAND flash, MRAM, ROM) and other memory products for various markets.

I need the manufacturer or datasheet to be precise. Based on the MX84B040NF1 naming, typical application areas for devices in this family include:
- Embedded system firmware storage and boot memory (NOR/NAND flash)
- Microcontroller-based control in industrial automation, consumer electronics, and automotive
- Data logging and edge devices in networking/IoT
- Firmware updates and secure storage in portable devices
Please share the datasheet or manufacturer to confirm exact uses and specs.

Typically an 8-pin SOIC (SOP-8) package; the NF1 suffix denotes the RoHS lead-free variant. For exact options, please consult the datasheet.