component

COS3157ST

Public Made by Adom

by adom

COSINE Analog Switches, Multiplexers, SOT-23-6. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs cos3157st: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
cos3157st-etched.fit.json cos3157st: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cos3157st-etched.glb cos3157st: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cos3157st-etched.step cos3157st: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cos3157st.glb Publish 0.1.0 · Ray
cos3157st.kicad_mod Publish 0.1.0 · Ray
cos3157st.kicad_sym Publish 0.1.0 · Ray
cos3157st.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
cos3157st.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json cos3157st: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md cos3157st: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

COS3157ST

COSINE · Analog Switches, Multiplexers · SOT-23-6

COS3157ST from COSINE, 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 NO bidirectional Normally Open analog switch terminal. Connected to COM when IN = 1 (switch ON), high-impedance when IN = 0. Rail-to-rail analog signal range 0V to VCC; conducts equally well in both directions with ~4.5Ω typical ON resistance.
2 GND power_in Ground return for the device. 0V reference for supply and digital control input.
3 NC bidirectional Normally Closed analog switch terminal. Connected to COM when IN = 0 (switch ON), high-impedance when IN = 1. Rail-to-rail analog signal range 0V to VCC; conducts equally well in both directions. Note: 'NC' here means Normally Closed switch pole, not No-Connect.
4 COM bidirectional Common analog switch terminal. Routed to either NO or NC depending on the state of the IN control pin. Rail-to-rail signal range 0V to VCC.
5 VCC power_in Positive supply input. Recommended operating range 1.65V to 5.5V (absolute max 6.0V). Typical quiescent supply current ICC ≤ 5µA at 5.5V.
6 IN input Digital control input selecting the switch state. IN = 0 → NC-to-COM path ON, NO OFF; IN = 1 → NO-to-COM path ON, NC OFF. TTL/CMOS compatible: VIH ≥ 2.6V (5V), ≥1.7V (3.3V); VIL ≤ 0.8V (5V), ≤0.7V (3.3V). Must be held HIGH or LOW; do not leave floating.

Key specifications

Parameter Value
Manufacturer COSINE
Package SOT-23-6
Category Interface
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • COS3157ST
  • COS3157STSC

CAD (KiCad official)

  • Symbol: COS3157ST
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: cos3157st-etched.step / cos3157st-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cos3157st.step / cos3157st.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cos3157st.step 97 KB You want the bare part, or you mark your own boards.
cos3157st-etched.step 1.9 MB You want the part with COS3157ST already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 461 faces against 117 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: COSINE datasheet (10 pp, sha256 7d3155a9f9498ff0, 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