component

SD3312A

Public Unreviewed

by Ray

SHOUDING Touch Sensors, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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SD3312A

SHOUDING · Touch Sensors · SOT-23-6

SD3312A from SHOUDING, in a SOT-23-6. 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 S2 input Mode-set input bit 2. Tie to VDD (logic 1) or GND (logic 0) to select one of the four operating modes together with S1; must not be left floating.
2 GND power_in Ground / negative supply return for the chip and the internal power NMOS source.
3 S1 input Mode-set input bit 1. Tie to VDD (logic 1) or GND (logic 0) to select one of the four operating modes together with S2; must not be left floating.
4 LX output LED drive output, active-low open-drain from the internal power NMOS (RDS(on) ≈85mΩ). Sinks the LED current (up to 1.8A continuous, 2A absolute max) from the LED cathode to GND; LED anode ties to VBAT through the current-set resistor R.
5 KEY input Tactile switch input with internal debounce. Threshold VIL ≤ 30%VDD, VIH ≥ 70%VDD; input current ≈180μA. A short press cycles the LED through the functions available in the currently selected mode.
6 VDD power_in Positive supply input. Recommended operating range 2.4-5V (typ 3.8V), absolute max 5V; requires a local decoupling capacitor (typ 1μF) to GND. Powers logic, oscillator, key detector, and the LX drive FET.

Key specifications

Parameter Value
Manufacturer SHOUDING
Package SOT-23-6
Category Sensor
Pins 6

CAD (KiCad official)

  • Symbol: SD3312A
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: SHOUDING datasheet (7 pp, sha256 dbc569c0f5d121da, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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