AT25SF081B-SSHD-T from Dialog Semiconductor Adesto Adesto Technologies, 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	Chip Select (active low). Asserting CS# selects the device; deasserting it places the device in standby. A high-to-low transition starts an operation; a low-to-high transition ends it.
2	SO/IO1	bidirectional	Serial Output in standard SPI mode; data clocked out on falling edge of SCK. Becomes bidirectional IO1 in Dual-Output and Quad-Output/IO modes. High-impedance when CS# is deasserted.
3	WP#/IO2	bidirectional	Write Protect (active low) controls the hardware locking feature. Becomes IO2 during Quad-Input Byte/Page Program and Quad-Output Read commands. Internally pulled-high; recommended to tie externally to VCC when Quad mode not used.
4	GND	power_in	Ground reference for the power supply. Connect to system ground.
5	SI/IO0	bidirectional	Serial Input for all commands and address sequences; data latched on rising edge of SCK. Becomes bidirectional IO0 in Dual/Quad-Output Read and Dual/Quad-I/O modes. Ignored when CS# is deasserted.
6	SCK	input	Serial Clock. Command, address, and input data are latched on the rising edge; output data on SO is clocked out on the falling edge. Supports up to 108 MHz.
7	HOLD#/IO3	bidirectional	Hold (active low) temporarily pauses serial communication without deselecting the device; SO goes high-impedance while asserted. Becomes IO3 during Quad-Input Byte/Page Program and Quad-Output Read commands. Internally pulled-high; recommended to tie externally to VCC when Hold not used.
8	VCC	power_in	Device power supply. AT25SF081B-SSHD variant operates at 2.5 V to 3.6 V (industrial -40 to +85 °C).

Key specifications

Parameter	Value
Manufacturer	Dialog Semiconductor Adesto Adesto Technologies
Package	SOP-8
Category	Memory
Pins	8

Ordering variants

AT25SF081B-SSHD-TSSHB-B
AT25SF081B-SSHD-TSSHB-T
AT25SF081B-SSHD-TSSHD-B
AT25SF081B-SSHD-T
AT25SF081B-SSHD-TSHB-B
AT25SF081B-SSHD-TSHB-T
AT25SF081B-SSHD-TSHD-B
AT25SF081B-SSHD-TMAHB-T
AT25SF081B-SSHD-TMAHD-T
AT25SF081B-SSHD-TDWF

CAD (KiCad official)

Symbol: AT25SF081B-SSHD-T
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`at25sf081b-sshd-t.step`	122 KB	You want the bare part, or you mark your own boards.
`at25sf081b-sshd-t-etched.step`	3.2 MB	You want the part with `AT25SF081B-SSHD-T` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 772 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: Dialog Semiconductor Adesto Adesto Technologies datasheet (59 pp, sha256 43b1cef43a64c40c, 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