# LM321LVIDCKR

**Texas Instruments** · Operational Amplifier · SC-70-5

LM321LVIDCKR from Texas Instruments, in a SC-70-5. 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 | Noninverting input of the op amp. Common-mode input range includes ground (V-) and extends to within ~1 V of V+. |
| 2 | V- | power_in | Negative (low) supply rail or ground for single-supply operation. Total supply span V+ to V- must be between 2.7 V and 5.5 V. |
| 3 | IN- | input | Inverting input of the op amp. Together with IN+ and the external feedback network sets the closed-loop gain and response. |
| 4 | OUT | output | Op-amp output. Rail-to-rail-ish output typical of LM321-class parts; drives external feedback network and load. |
| 5 | V+ | power_in | Positive (high) supply rail. Operating supply voltage 2.7 V to 5.5 V referenced to V-. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SC-70-5 |
| Category | Op-amp/Cmp |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `LM321LVIDCKR`
- `LM321LVIDCKT`
- `LM321LVIDCKRIDBVR`
- `LM321LVIDCKRIDBVT`
- `LM321LVIDCKRD`
- `LM321LVIDCKRDGK`
- `LM321LVIDCKRPW`
- `LM321LVIDCKRDDF`

## CAD (KiCad official)

- Symbol: `LM321LVIDCKR`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SC-70-5 (KiCad packages3D, STEP)
- 3D model files: `lm321lvidckr-etched.step` / `lm321lvidckr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm321lvidckr.step` / `lm321lvidckr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm321lvi.pdf) (46 pp, sha256 `dfb389bf4341032c`, 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/lm321lvidckr-datasheet.pdf)