# GS8743-CR

**Gainsil** · Comparators · SC-70-5

GS8743-CR from Gainsil, 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 | OUT | output | Comparator output. CMOS/TTL-compatible push-pull output; rail-to-rail swing (VOH = VDD - 0.166V, VOL = 132mV typical at IO = 4mA). Short-circuit source/sink currents ~42.6/43.7mA typical. |
| 2 | VSS | power_in | Negative supply / ground. Referenced to GND in single-supply operation (2.7V to 5.5V); may be tied to a negative rail for dual ±1.35V to ±2.75V supply operation. |
| 3 | IN+ | input | Non-inverting comparator input. Rail-to-rail common-mode range (VSS-0.1V to VDD+0.1V). Input bias current 6pA typical, input offset voltage 5mV max. |
| 4 | IN- | input | Inverting comparator input. Rail-to-rail common-mode range (VSS-0.1V to VDD+0.1V). Input bias current 6pA typical, 3mV internal hysteresis referenced between inputs. |
| 5 | VDD | power_in | Positive supply. Single-supply +2.7V to +5.5V (absolute max +7.5V). Bypass with 0.1uF ceramic capacitor placed close to this pin. |

## Key specifications

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

## Ordering variants

Same part, different packaging or reel option.

- `GS8743-CR`
- `GS8743-CRTR`

## CAD (KiCad official)

- Symbol: `GS8743-CR`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SC-70-5 (KiCad packages3D, STEP)
- 3D model files: `gs8743-cr-etched.step` / `gs8743-cr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gs8743-cr.step` / `gs8743-cr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Gainsil datasheet](docs/gs8743-cr-datasheet.pdf) (10 pp, sha256 `01cf762eed96a4a8`, 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](docs/gs8743-cr-datasheet.pdf)