AT45DB321E-SHF-T from Dialog Semiconductor Adesto Adesto Technologies, in a SOIC-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	SI	input	Serial Input. Shifts command, address, and data into the device on the rising edge of SCK. Ignored while CS is deasserted.
2	SCK	input	Serial Clock. Provides the clock reference; SI is latched on the rising edge, SO is clocked out on the falling edge.
3	RESET	input	Active-low hardware reset. Low state terminates any in-progress operation and holds the device in reset. Internally pulled and safe during power-on; recommended to be driven high externally when not used.
4	CS	input	Active-low Chip Select. Enables the device when asserted; when deasserted the device is deselected, SO becomes high-impedance, and inputs are ignored.
5	WP	input	Active-low Write Protect. When asserted, sectors specified in the Sector Protection Register are protected against program/erase, independent of software protection. Internally pulled high; recommended to tie to VCC when hardware protection is unused.
6	VCC	power_in	Device power supply, 2.3 V to 3.6 V.
7	GND	power_in	Ground reference for the power supply. Connect to system ground.
8	SO	output	Serial Output. Data is clocked out on the falling edge of SCK. High-impedance whenever CS is deasserted.

Key specifications

Parameter	Value
Manufacturer	Dialog Semiconductor Adesto Adesto Technologies
Package	SOIC-8-208mil
Category	Memory
Pins	8

Ordering variants

AT45DB321E-SHF-TSHF-B
AT45DB321E-SHF-T
AT45DB321E-SHF-TSHF2B-T
AT45DB321E-SHF-TSHFHA-T
AT45DB321E-SHF-TSHFHC-T
AT45DB321E-SHF-TMWHF-Y
AT45DB321E-SHF-TMWHF2B-T

CAD (KiCad official)

Symbol: AT45DB321E-SHF-T
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8-208mil (KiCad packages3D, STEP)

Provenance

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

Datasheet: Dialog Semiconductor Adesto Adesto Technologies datasheet (71 pp, sha256 ed47d9dfbf033f54, 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