S25FL256LAGMFI003

The S25FL256LAGMFI003 is a 256‑Mbit serial NOR flash memory from Cypress/Spansion used to store firmware and data in embedded systems. It uses a SPI‑compatible interface and supports standard SPI, dual I/O, and quad I/O (QIO) read modes for higher throughput. The device is organized for erase/program operations with typical sector and block sizes (e.g., small 4 KB sectors, larger blocks) and a page program size (commonly 256 bytes). Key features include fast/standard read, page programming, sector/block erase, and security features (block protection and security registers), plus low‑power options such as deep power‑down. Addressing can be 3‑ or 4‑byte (in QPI mode) to access the full 32 MB array. It operates in a defined voltage range (variant dependent, typically around 2.7–3.6 V) with appropriate temperature grades. The FI003 suffix indicates a specific fabrication/revision/packaging variant. For exact electrical characteristics, timing, and usage details, consult the official datasheet and product page.

Equivalents (256 Mb, 3.3V SPI flash):
- Winbond W25Q256JV
- Macronix MX25L25645GMI-10G
- GigaDevice GD25Q256CSIG
- ISSI IS25LP256D
Note: verify exact package, speed grade, and temperature/auto-grade options for your design.

Key features of S25FL256LAGMFI003:
- 256-Mbit serial NOR flash (32 MB)
- SPI interface with Dual I/O, Quad I/O, and QPI modes
- 4-byte addressing mode for full memory map (supports >16 MB)
- High-speed read up to 104 MHz
- Page program: 256-byte pages
- Erase types: 4 KB sectors; 32 KB and 64 KB blocks; chip erase
- Operating voltage: 2.7–3.6 V
- Low-power modes: deep power-down and standby
- Data retention: long-term retention (typical data retained for many years)
- Endurance: up to tens of thousands of P/E cycles per sector (datasheet-spec)
- Security features: sector/block protection, status register, WP/reset
- Industrial temperature range (-40°C to +105°C)

- Pin count: 8 pins
- Function: 256‑Mbit serial SPI flash memory (S25FL256L). Provides SPI interface (CS, CLK, MOSI, MISO) plus WP# and HOLD# control pins, with VCC and GND. Supports standard SPI and Dual/Quad I/O (QPI) operation for fast data access.

- Manufacturer: Spansion (brand now Cypress Semiconductor; Cypress later became part of Infineon Technologies).
- What kind of company: A semiconductor company that designs and manufactures memory integrated circuits, such as SPI flash memories.

S25FL256LAGMFI003 is a 256-Mbit serial flash memory suitable for:
- Boot and firmware storage for microcontrollers/SoCs
- Firmware/bootloader updates (including OTA or field updates)
- Data logging and persistent data storage (sensor data, logs)
- Configuration and parameter storage for embedded systems (IoT, industrial, automotive)
- Look-up tables, calibration data, and media/asset storage in devices
- Secure storage with protected regions (where supported) for critical code/data
Applications span consumer electronics, automotive, industrial, and networking equipment.

8-pin SOIC (8-SOP) package.