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ATSHA204A-SSHDA-T

Public Unreviewed

by Ray

Microchip Security Verification / Encryption ICs, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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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)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
atsha204a-sshda-t.step 122 KB You want the bare part, or you mark your own boards.
atsha204a-sshda-t-etched.step 2.7 MB You want the part with ATSHA204A-SSHDA-T already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 690 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: Microchip datasheet (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