GD25Q vs W25Q: SPI NOR Flash Replacement Comparison
GigaDevice GD25Q is the most common second source for the Winbond W25Q — both are standard JEDEC SPI NOR with the same pinout and command set. The main difference is the JEDEC manufacturer ID.
| Our pick GD25Q GigaDevice | W25Q Winbond | |
|---|---|---|
| Standard | JEDEC SPI NOR | JEDEC SPI NOR |
| Pinout | SOP-8/WSON-8 (same as W25Q) | SOP-8 / WSON-8 |
| Interface | SPI / Dual / Quad | SPI / Dual / Quad |
| QE bit | SR2 bit1 | SR2 bit1 |
| JEDEC manufacturer ID | C8h | EFh |
| Drop-in swap | Yes (same density) | — |
Which should you choose?
At the same density the GD25Q drops in for the W25Q on the same PCB; the only change is updating firmware that hard-codes the JEDEC ID (EFh→C8h), and confirming voltage/timing per density.
Cross-references
Frequently asked questions
Does firmware change when switching to GD25Q? ▾
Usually not. Standard read/write/erase commands match the W25Q; you only need to add GigaDevice’s C8h when firmware identifies the chip by a fixed JEDEC ID (Winbond EFh).