# LRC099-04AT1G

**LRC** · ESD And Surge Protection (TVS/ESD) · TSOP-6

LRC099-04AT1G from LRC, in a TSOP-6. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | I/O1 | passive | ESD-protected channel 1 I/O line with 0.9pF (max) capacitance to GND and VRWM of 5V to GND. |
| 2 | GND | power_in | Negative rail of the diode array, connected to system ground, with ESD current steered to it through the ESD diodes and zener diode. |
| 3 | I/O2 | passive | ESD-protected channel 2 I/O line with 0.9pF (max) capacitance to GND and VRWM of 5V to GND. |
| 4 | I/O4 | passive | ESD-protected channel 4 I/O line with 0.9pF (max) capacitance to GND and VRWM of 5V to GND. |
| 5 | VREF | power_in | Positive supply rail of the diode array, with an integrated zener diode between it and GND that clamps positive ESD voltage to the zener voltage. |
| 6 | I/O3 | passive | ESD-protected channel 3 I/O line with 0.9pF (max) capacitance to GND and VRWM of 5V to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | TSOP-6 |
| Category | Circuit Protection |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `LRC099-04AT1G`
- Footprint: `Package_SO:TSOP-6_1.65x3.05mm_P0.95mm`
- 3D model: TSOP-6 (KiCad packages3D, STEP)
- 3D model files: `lrc099-04at1g-etched.step` / `lrc099-04at1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lrc099-04at1g.step` / `lrc099-04at1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589835474412990464) (5 pp, sha256 `fb325da77023fa25`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lrc099-04at1g-datasheet.pdf)