ATSHA204A-SSHDA-T

@@ -0,0 +1,48 @@+# ATSHA204A-SSHDA-T++**Microchip** · Security Verification / Encryption ICs · SOIC-8++ATSHA204A-SSHDA-T from Microchip, 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 | NC | unconnected | No Connect. Leave floating or tie to ground per board convention. |+| 2 | NC | unconnected | No Connect. Leave floating or tie to ground per board convention. |+| 3 | NC | unconnected | No Connect. Leave floating or tie to ground per board convention. |+| 4 | GND | power_in | Ground reference for the device. |+| 5 | SDA | bidirectional | Serial Data. Open-drain I2C data line (up to 1 MHz). Requires external pull-up to VCC. On the ATSHA204A-SSHDA variant this device is configured for the I2C interface; on the SWI variant the same pad functions as the Single-Wire Interface data/signal line. |+| 6 | SCL | input | Serial Clock Input for the I2C interface. Requires external pull-up to VCC. Not used on the Single-Wire Interface variant. |+| 7 | NC | unconnected | No Connect. Leave floating or tie to ground per board convention. |+| 8 | VCC | power_in | Power supply input, 2.0V to 5.5V operating range. Bypass with a local decoupling capacitor to GND. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Microchip |+| Package | SOIC-8 |+| Category | Interface |+| Pins | 8 |++## Ordering variants++- `ATSHA204A-SSHDA-T`+- `ATSHA204A-SSHDA-TSSHDA-B`++## CAD (KiCad official)++- Symbol: `ATSHA204A-SSHDA-T`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Microchip datasheet](docs/atsha204a-sshda-t-datasheet.pdf) (93 pp, sha256 `1eec12abfe0ae347`, retrieved 2026-08-17, tier: manufacturer)+- **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/atsha204a-sshda-t-datasheet.pdf)

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