ZD25Q128CSIGT from Zetta, 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	Chip Select input, active low. Drive low to select the device and initiate a command; drive high to deselect and place SO/IO pins in High-Z.
2	SO/IO1	bidirectional	Serial Data Output in Standard SPI mode; bidirectional Data I/O bit 1 in Dual/Quad SPI and QPI modes. Data is shifted out on the falling edge of SCLK in single-mode.
3	WP#/IO2	bidirectional	Active-low Write Protect input in Standard/Dual SPI mode (blocks writes to the Status Register when SRP0=1); becomes bidirectional Data I/O bit 2 in Quad SPI/QPI modes.
4	VSS	power_in	Ground reference for the device (0 V).
5	SI/IO0	bidirectional	Serial Data Input in Standard SPI mode; bidirectional Data I/O bit 0 in Dual/Quad SPI and QPI modes. Data is latched on the rising edge of SCLK in single-mode.
6	SCLK	input	Serial Clock input. Provides the timing reference for all serial input and output; up to 133 MHz. Supports SPI mode 0 (CPOL=0, CPHA=0) and mode 3 (CPOL=1, CPHA=1).
7	HOLD#/RESET#/IO3	bidirectional	Multi-function pin: HOLD# pauses serial communication (Standard/Dual SPI, active low) or RESET# performs a hardware reset, depending on the HOLD/RST configuration bit; becomes bidirectional Data I/O bit 3 in Quad SPI/QPI modes.
8	VCC	power_in	Core and I/O power supply, 2.7 V to 3.6 V. Typical standby current 15 uA; deep power-down current 1 uA typical.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

ZD25Q128CSIGT

CAD (KiCad official)

Symbol: ZD25Q128CSIGT
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
`zd25q128csigt.step`	122 KB	You want the bare part, or you mark your own boards.
`zd25q128csigt-etched.step`	2.7 MB	You want the part with `ZD25Q128CSIGT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 654 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: Zetta datasheet (85 pp, sha256 5be74b7133003016, 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