# AT45DB321E-SHF-T

**Dialog Semiconductor Adesto Adesto Technologies** · NOR FLASH · SOIC-8-208mil

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)
- 3D model files: `at45db321e-shf-t-etched.step` / `at45db321e-shf-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `at45db321e-shf-t.step` / `at45db321e-shf-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Dialog Semiconductor Adesto Adesto Technologies datasheet](docs/at45db321e-shf-t-datasheet.pdf) (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](docs/at45db321e-shf-t-datasheet.pdf)