FM25Q04B-SO-T-G

@@ -0,0 +1,47 @@+# FM25Q04B-SO-T-G++**FUDAN MICRO** · NOR FLASH · SOP-8++FM25Q04B-SO-T-G from FUDAN MICRO, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | CS# | input | Active-low SPI Chip Select input. When high, device is deselected and DO/DQ pins are high-impedance; when low, device is enabled and instructions can be written / data read. Must track VCC at power-up; a pull-up resistor to VCC is recommended. |+| 2 | DO/DQ1 | bidirectional | Standard SPI Serial Data Output (DO); becomes bidirectional DQ1 in Dual SPI, Quad SPI, and QPI modes. Data is shifted out on the falling edge of CLK in Standard SPI mode. |+| 3 | WP#/DQ2 | bidirectional | Active-low Write Protect input for Standard/Dual SPI, used with the Status Register block-protect bits and SRP to hardware-protect part or all of the array. Becomes bidirectional DQ2 when the Quad Enable (QE) bit in Status Register-2 is set for Quad SPI / QPI operation. |+| 4 | VSS | power_in | Device ground reference (0 V). |+| 5 | DI/DQ0 | bidirectional | Standard SPI Serial Data Input (DI); becomes bidirectional DQ0 in Dual SPI, Quad SPI, and QPI modes. Instructions, addresses, and data are shifted in on the rising edge of CLK in Standard SPI mode. |+| 6 | CLK | input | SPI Serial Clock input; provides timing for all serial input and output operations. Supports SPI Mode 0 and Mode 3, up to 100 MHz for FAST_READ and 50 MHz for standard READ. |+| 7 | HOLD#/DQ3 | bidirectional | Active-low Hold input for Standard/Dual SPI - when driven low with CS# low, pauses serial communication (DO becomes high-Z, DI/CLK ignored). Becomes bidirectional DQ3 when QE=1 for Quad SPI / QPI operation; HOLD# function is unavailable in Quad modes. |+| 8 | VCC | power_in | Positive supply voltage input, 2.3 V to 3.6 V single-supply operation. Decouple with a bypass capacitor close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | FUDAN MICRO |+| Package | SOP-8 |+| Category | Memory |+| Pins | 8 |++## Ordering variants++- `FM25Q04B-SO-T-GSO`++## CAD (KiCad official)++- Symbol: `FM25Q04B-SO-T-G`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [FUDAN MICRO datasheet](docs/fm25q04b-so-t-g-datasheet.pdf) (69 pp, sha256 `d930695cfb844a82`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/fm25q04b-so-t-g-datasheet.pdf)

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