W25Q128JVEJQ

W25Q128JVEJQ is a Winbond 128‑Mbit serial flash memory used to store firmware and data.
Key points:
- Interface: SPI‑compatible. Standard SPI up to about 104 MHz; some variants support dual/quad I/O on related parts. Usually available in 8‑pin packages.
- Capacity and organization: 16 MB total. Stored in 4 KB sectors, with 32 KB/64 KB blocks and 256‑byte pages for programming.
- Features: fast read, page program, sector/block/chip erase, write enable, deep power‑down, and standard protection (WP/HOLD pins). JEDEC ID read supports device identification.
- Electrical and temp: operates from ~2.7–3.6 V; available for commercial/industrial temperature ranges.
- Endurance and retention: typical endurance ~100,000 program/erase cycles per sector; data retention ~20 years.
- Applications: firmware/boot code storage, embedded systems, consumer electronics.
- Packaging: common 8‑pin SOP or WSON formats.
Note: JVEJQ indicates a specific voltage/packaging/grade variant; check the datasheet for exact specs.

Common 128-Mbit SPI-NOR flash cross-refs for W25Q128JVEQ:
- Macronix MX25L12845G
- GigaDevice GD25Q128C
- ISSI IS25LP128F
- Micron N25Q128A11ESE
- EON EN25QH128
- Spansion S25FL128S
Verify packaging, voltage (3.3V) and timing before substitution.

Key features of W25Q128JVEJQ:
- 128 Mbit (16 MB) serial NOR flash memory
- SPI interface with standard SPI plus Dual I/O and Quad I/O for higher throughput
- 24‑bit addressing (up to 16 MB address space)
- Fast read speeds up to 104 MHz (plus Dual/Quad Read modes)
- Page program: 256 bytes; Erase: 4 KB sectors; 32 KB and 64 KB blocks; Chip erase option
- Endurance: ~100,000 program/erase cycles per sector; Data retention ~20 years at 25°C
- Low power with deep power-down mode
- Supply voltage: 2.7–3.6 V (single supply)
- Operating temperature: -40°C to +85°C
- Security/ID features: 64‑bit unique ID, security registers, hardware write protection
- Packaging: 8-pin package (SOP8/USON8), RoHS compliant
Applications: boot/firmware storage, code execution from flash, data logging.

- Pin count: 8 pins (SPI serial flash package: CS, CLK, DI, DO, WP#, HOLD#, VCC, GND)
- Function: 128-Mbit (16 MB) non-volatile serial flash memory with SPI interface, used to store firmware/data; supports standard Read/Write/Erase commands.

Manufacturer: Winbond Electronics Corporation.
What kind of company: A Taiwanese semiconductor company that designs and manufactures memory ICs (NOR/NAND flash and other memory products), i.e., an integrated device manufacturer (IDM) with its own fabrication facilities.

W25Q128JVEQ is a 128 Mbit SPI NOR flash. Common applications include:
- Firmware/code storage for microcontrollers/SoCs
- Boot firmware memory for consumer electronics (TVs, set-top boxes, printers, cameras)
- Data storage for logging, calibration data, and look-up tables
- Storage for graphics, fonts, and other assets for displays and HMI
- Firmware updates/field upgrades for IoT and industrial networking devices
concise and suitable for embedded designs.

8-pin SOP (SOIC-8) package.