LM321SN3T1G
Public Unreviewedby Ray
TECH PUBLIC Operational Amplifier, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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README
markdownLM321SN3T1G
TECH PUBLIC · Operational Amplifier · SOT-23-5
LM321SN3T1G from TECH PUBLIC, in a SOT-23-5. 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 | +IN | input | Non-inverting input of the operational amplifier. Common-mode input voltage range is 0V to Vcc-1.5V; input bias current typically -20 nA. |
| 2 | -Vs | power_in | Negative supply / ground pin. Tie to GND for single-supply operation, or to the negative rail for split supply. Total supply range (Vcc - Vss) is 3V to 36V. |
| 3 | -IN | input | Inverting input of the operational amplifier. Input bias current typically -20 nA; input differential voltage range ±20V. |
| 4 | OUT | output | Op-amp output. Output voltage swing is 0V to Vcc-1.5V; short-circuit protected with typical Isc = 40 mA at Vcc=15V. |
| 5 | +Vs | power_in | Positive supply pin. Single-supply range 3V to 36V (absolute max 40V); split-supply range ±20V max. Typical supply current 0.7 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-5 |
| Category | Op-amp/Cmp |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
LM321SN3T1G
CAD (KiCad official)
- Symbol:
LM321SN3T1G - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
lm321sn3t1g.step |
85 KB | You want the bare part, or you mark your own boards. |
lm321sn3t1g-etched.step |
2.0 MB | You want the part with LM321SN3T1G already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 485 faces against 102 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: TECH PUBLIC datasheet (6 pp, sha256
a15e033dd5e9d65d, 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).