SST25WF080B-40I/SN

SST25WF080B-40I/SN is an 8 Mbit serial SPI flash memory from SST (now Microchip). It provides non-volatile storage optimized for firmware and data.
Key points
- Capacity: 8 Mbit (1 MB) of flash memory.
- Interface: SPI; supports standard and fast read; 256-byte page programming.
- Erase/Write: 4 KB sectors; larger blocks (32 KB/64 KB) and full-chip erase; requires WREN before writes; status and protection features.
- Speed and temp: up to 40 MHz clock (Fast Read); Industrial temp range -40°C to +85°C (the “-40I”).
- Voltage: typically 2.7–3.6 V.
- Package: 8-pin device (SN suffix denotes RoHS/tape-and-reel packaging, e.g., SOIC-8).
- Applications: firmware storage, boot ROM, data logging, embedded systems.
Usage note: refer to the datasheet for exact timing, command set (READ, FAST READ, PAGE PROGRAM, SECTOR/ BLOCK/ CHIP ERASE, WREN, RDSR, etc.), and protection options.

Equivalent SPI NOR flash 8Mbit, 3V, 40MHz options:
- Winbond W25Q80BV / W25Q80DV
- Macronix MX25L8006E
- Gigadevice GD25Q80B
- Spansion S25FL080P
- ISSI IS25LP080D
- Puya P25Q80U
- Adesto AT25DF081A
Note: verify exact timing, voltage, and command compatibility in datasheets.

Concise features of SST25WF080B-40I/SN:
- 8 Mbit (1 MB) serial flash memory
- SPI-compatible four-wire interface (SCK, SI, SO, CS)
- Up to 40 MHz operation
- 3-byte addressing
- 256-byte page program with sequential page writes
- Sector erase (4 KB) and bulk/block erase options
- Fast Read and standard Read modes
- Deep Power-Down mode and low-power standby
- Write protection and status register controls
- Industrial temperature range (-40°C to +85°C)
- Supply voltage 2.7–3.6 V (I/O voltage same as Vcc)
- RoHS-compliant; available in 8-pin SOIC/SOP (SN variant) packaging
Note: exact sector/block sizes and endurance figures are device-specific; consult the datasheet for precise numbers.

- Pin count: 8 pins (8-pin SOP/SOIC package).
- Function: 8 Mbit serial flash memory with SPI interface.
- Pinout (typical): 1 = CS#, 2 = SO (MISO), 3 = WP#, 4 = GND, 5 = SI (MOSI), 6 = SCK, 7 = HOLD#, 8 = VCC.
- Note: WP# and HOLD# are active-low; CS# enables the device.

- Manufacturer: Silicon Storage Technology (SST).
- What kind of company: An American semiconductor company that designs and markets non-volatile memory products, especially serial flash memory used for firmware storage in embedded systems. SST is now a brand/line within Microchip Technology.

- Firmware storage and boot code for microcontrollers/SoCs
- Firmware updates in embedded systems via SPI flash
- Non-volatile data logging and parameter storage
- Configuration memory for consumer electronics (printers, cameras, set-top boxes, IoT devices)
- Automotive and industrial control electronics requiring reliable non-volatile storage
- Networking equipment and other compact devices (routers, USB peripherals) needing small-footprint flash memory

8-pin SOIC (SOP) package.