FM25CL64B-GTR from Infineon, in a SOIC-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	Chip Select (active LOW). When HIGH, the device enters low-power standby mode, ignores other inputs, and tri-states the output. A falling edge on CS internally activates the SCK signal and must occur before every opcode.
2	SO	output	Serial Output (MISO). Driven during a read and tri-stated at all other times, including when HOLD is LOW. Data transitions on the falling edge of SCK.
3	WP	input	Write Protect (active LOW). Prevents write operations to the Status Register when WPEN=1. Must be tied to VDD if not used.
4	VSS	power_in	Ground reference for the device. Must be connected to system ground.
5	SI	input	Serial Input (MOSI). All data is input on this pin, sampled on the rising edge of SCK. Should always be driven to a valid logic level to meet IDD specs. May be tied to SO for a single-pin data interface.
6	SCK	input	Serial Clock. All I/O activity is synchronized to this clock. Inputs are latched on the rising edge and outputs occur on the falling edge. Clock frequency 0 to 20 MHz; may be interrupted at any time.
7	HOLD	input	HOLD (active LOW). When LOW, suspends the current SPI operation; device ignores transitions on SCK and CS. Transitions must occur while SCK is LOW. Must be tied to VDD if not used.
8	VDD	power_in	Power supply input to the device. Operating range 2.7 V to 3.65 V.

Key specifications

Parameter	Value
Manufacturer	Infineon
Package	SOIC-8
Category	Memory
Pins	8

Ordering variants

Same part, different packaging or reel option.

FM25CL64B-GTRG
FM25CL64B-GTR
FM25CL64B-GTRDG
FM25CL64B-GTRDGTR

CAD (KiCad official)

Symbol: FM25CL64B-GTR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`fm25cl64b-gtr.step`	122 KB	You want the bare part, or you mark your own boards.
`fm25cl64b-gtr-etched.step`	2.4 MB	You want the part with `FM25CL64B-GTR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 597 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: Infineon datasheet (21 pp, sha256 7c6df2f70b3e907d, 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