MX25R4035FZUIH1

MX25R4035FZUIH1 is Macronix’s 4‑Mbit serial flash memory in an 8‑pin package. It provides SPI/Quad I/O access for firmware and data storage in embedded systems.
Key points:
- Capacity: 4 Mbit (512 KB).
- Interface: Serial SPI with dual/quad I/O (QIO/QPI) modes for higher throughput.
- Voltage: 2.7–3.6 V supply.
- Memory organization: 256-byte page programming; sector/block erase (typical sectors ~4 KB; blocks larger, up to bulk erase).
- Features: Write enable/disable, status/config registers with block protection, Deep Power-Down, standard security options.
- Endurance/retention: typically tens of thousands of P/E cycles with long data retention (datasheet specifies endurance and retention for industrial use).
- Package: 8‑pin variant (UIH1) suitable for compact devices.
- Applications: boot ROM, firmware storage, data logging and other code/data storage in microcontrollers and SoCs.
For exact electrical specs, timing, command set, and package details, refer to the MX25R4035FZUIH1 datasheet.

MX25R4035FZUIH1 is a 4-Mbit SPI NOR Flash. Close equivalents (same capacity and interface) include:
- Winbond W25Q40BV / W25Q40DV
- Gigadevice GD25Q40B / GD25Q40C
- Micron N25Q040A
- ISSI IS25LP040D
- Spansion S25FL040
Check each datasheet for exact voltage, timing, and package compatibility.

Here are the key features of MX25R4035FZUIH1 (MX25R family, 4Mbit SPI NOR Flash):
- Density: 4 Mbit (512 KB)
- Interface: Serial SPI with standard, Dual I/O, and Quad I/O/Quasi-Quad modes
- Voltage: 2.7–3.6 V
- Speed/read modes: Fast Read and Quad/Dual I/O Fast Read
- Organization: 256-byte page size; 4 KB sectors; larger blocks (typical 32 KB/64 KB blocks)
- Addressing: 24-bit addressing
- Write/erase: Page program; sector/block erase with write enable and protection features
- Security/protection: Sector/Block protection, WP# and status register protection
- Endurance/retention: ~100,000 erase cycles; data retention ~20 years
- Temperature: Industrial grade, typically -40 °C to 85 °C
- Package: 8-pin small-outline/leadframe package (industrial grade availability)
For exact timing, frequencies, and package variants, consult the official datasheet.

- Pin count: 8 pins (SOIC-8/USON-8 package)
- Function: Serial SPI flash memory (4 Mbit) for storing firmware/data; pins include CS, CLK, SI, SO, WP#, HOLD#, VCC, GND.

- Manufacturer: Macronix International Corp., Ltd. (MXIC).
- Company type: Taiwan-based semiconductor company that designs and manufactures non-volatile memory (e.g., NOR flash) and operates as an integrated device manufacturer (IDM) with its own fabrication facilities.

MX25R4035FZUIH1 is a Quad SPI serial flash used for:
- Boot code and firmware storage for MCUs/SoCs
- Firmware updates and patch storage (OTAs and provisioning)
- External code/data storage for embedded systems
- Data logging and parameter/config storage
- IoT devices, wearables, industrial controllers, and automotive electronics
- Consumer electronics, networking gear (routers, set‑top boxes), smart meters
- Secure, low‑power external storage in embedded platforms
Note: Designed for high-speed, reliable storage with Quad SPI interface suitable for compact, cost‑effective embedded systems.

8-pin SOP package (SOIC-8).