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Contents

Pinout
Key specifications
Ordering variants
CAD (KiCad official)
3D model downloads
Provenance

README

markdown

FM25Q16A-SO-T-G

FUDAN MICRO · NOR FLASH · SOP-8-208mil

FM25Q16A-SO-T-G from FUDAN MICRO, in a SOP-8-208mil. 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	SPI Chip Select Input (active low). When high, the device is deselected and DO / DQ0-DQ3 are high-impedance and the part enters standby. When brought low, the device is selected and instructions/data are transferred. Must track VCC at power-up; a pull-up to VCC on CS# is recommended for standby.
2	DO/DQ1	bidirectional	Standard SPI Serial Data Output (DO); becomes bidirectional Data I/O 1 (DQ1) when using Dual SPI, Quad SPI, or QPI instructions. In Standard SPI, data is shifted out on the falling edge of CLK.
3	WP#/DQ2	bidirectional	Write Protect input (active low) in Standard/Dual SPI. Prevents Status Register writes when combined with the SRP/CMP/SEC/TB/BP bits to hardware-protect a region of the array. When the Quad Enable (QE) bit in Status Register-2 is set, this pin becomes bidirectional data pin DQ2 for Quad SPI / QPI operation.
4	VSS	power_in	Ground reference for the device.
5	DI/DQ0	bidirectional	Standard SPI Serial Data Input (DI); becomes bidirectional Data I/O 0 (DQ0) when using Dual SPI, Quad SPI, or QPI instructions. In Standard SPI, instructions/addresses/data are latched on the rising edge of CLK.
6	CLK	input	SPI Serial Clock Input providing the timing for all serial input and output operations. Supports SPI Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1). Max 100 MHz for Fast Read, 66 MHz for standard Read.
7	HOLD#/DQ3	bidirectional	Hold input (active low) in Standard/Dual SPI. When asserted while CS# is low, DO goes high-Z and DI/CLK are ignored, pausing device operation without deselecting it. When the Quad Enable (QE) bit in Status Register-2 is set, this pin becomes bidirectional data pin DQ3 for Quad SPI / QPI; HOLD# function is then unavailable.
8	VCC	power_in	Power supply input. Operating range 2.5 V to 3.6 V (industrial temperature range). Bypass with a 0.1 uF ceramic capacitor to VSS close to the pin.

Key specifications

Parameter	Value
Manufacturer	FUDAN MICRO
Package	SOP-8-208mil
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

FM25Q16A-SO-T-G

CAD (KiCad official)

Symbol: FM25Q16A-SO-T-G
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8-208mil (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`fm25q16a-so-t-g.step`	122 KB	You want the bare part, or you mark your own boards.
`fm25q16a-so-t-g-etched.step`	2.5 MB	You want the part with `FM25Q16A-SO-T-G` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 620 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: FUDAN MICRO datasheet (79 pp, sha256 c0c72352a27a0728, 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