W25Q128FVSAQ

W25Q128FVSAQ is Winbond’s 128-Mbit serial flash memory (16 MB) in an 8-pin package, designed for code and data storage in embedded systems. Key points:
- Interface and voltage: SPI with support for dual/quad I/O (DQ lines); operates at 2.7–3.6 V.
- Capacity and organization: 16 MB total; memory organized into 4 KB sectors, 256-byte pages; supports sector, 64 KB block, and full-chip erases.
- Performance: standard read up to high-speed SPI (typical up to ~104 MHz); Quad I/O and QPI modes available for faster reads.
- Operations: typical commands for read, fast read, write enable/disable, page program, sector/block/chip erase, power-down, release from power-down, and status/ configuration registers.
- Features: automatic erase/write protections, status register bits (WEL, BP bits, etc.), deep power-down mode for low power consumption, and JEDEC ID support.
- Use: common choice for firmware storage, bootloaders, and other non-volatile storage in microcontroller-based designs.
SAQ indicates the specific package variant (8-pin).

Key features of W25Q128FVSAQ (128-Mbit serial flash):
- Density: 128 Mbit (16 MB) of flash memory
- Interface: Serial SPI with Dual/Quad I/O (QPI) support; fast/dual/quad-read modes
- Speed: Read up to 104 MHz (higher in dual/quad modes)
- Voltage: 2.7–3.6 V supply
- Organization: 256-byte pages
- Erase blocks: 4 KB sectors; 32 KB and 64 KB blocks; Chip erase option
- Endurance/retention: ~100,000 program/erase cycles; data retention ~20 years
- Security/protection: block/sector protection, status register, Write Enable Latch, WP# protection
- Power modes: normal, deep power-down, and low-power standby
- Operating temp: typically -40°C to 85°C
- Package: 8-pin SOP (SOP8) option (suffix indicates specific package)
Note: exact speed grades and package variants can vary by revision; consult the datasheet for the specific lot.

An 8-pin SOP (SOIC) package (SOP-8, 300 mil).

- Pin count: 8 pins
- Function: Winbond W25Q128FVSAQ is a 128‑Mbit serial NOR flash memory (SPI interface) used to store firmware/data. Pins provide SPI signals plus control signals: CS, CLK, MOSI, MISO, VCC, GND, WP# (Write Protect) and HOLD# (Hold). Active-low WP# and HOLD#.

Manufacturer: Winbond Electronics Corporation (Winbond).
Winbond is a Taiwanese semiconductor company that designs and manufactures memory ICs, notably NOR flash and DRAM, and sells memory solutions worldwide.

W25Q128FVSAQ applications:
- Boot firmware storage and execute-in-place (code memory) for MCUs/SoCs; supports firmware updates.
- Data storage and logging (calibration data, configuration, event logs).
- External storage for consumer electronics (digital cameras, set-top boxes, MP3 players, wearables).
- Industrial and networking devices (routers, modems, controllers, PLCs).
- Automotive electronics (infotainment, dash cams).

Common cross-references (128 Mb SPI NOR flash, 3.3V, SOIC-8):
- Macronix MX25L12845G (also MX25L12835F)
- Gigadevice GD25Q128C (GD25Q128CSIG)
- ISSI IS25LP128D
- Spansion/Cypress S25FL128S
Note: check timing, IO mode (Dual/Quad), and package variant for exact compatibility.