# HT8051BRTZ

**HTCSEMI** · Comparators · SOT-23-5

HT8051BRTZ from HTCSEMI, 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 | +VIN | input | Non-inverting comparator input. Common-mode input range GND+0.2V to VDD-0.2V. Input resistance >100 GΩ; differential input capacitance 1.8pF. |
| 2 | GND | power_in | Ground return for the device. |
| 3 | -VIN | input | Inverting comparator input. Common-mode input range GND+0.2V to VDD-0.2V. Input resistance >100 GΩ; differential input capacitance 1.8pF. |
| 4 | OUTPUT | output | Rail-to-rail comparator digital output, CMOS/TTL compatible. VOH ≥ VDD-0.3V, VOL ≤ GND+0.3V. Short-circuit current to VDD ≈ 25mA. Rise/fall times 35/28ns. |
| 5 | VCC | power_in | Positive power supply, 2.7V to 5.5V (absolute max 5.5V). Quiescent current ~200uA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOT-23-5 |
| Category | Op-amp/Cmp |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `HT8051BRTZ`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ht8051brtz-etched.step` / `ht8051brtz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht8051brtz.step` / `ht8051brtz.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HTCSEMI datasheet](docs/ht8051brtz-datasheet.pdf) (6 pp, sha256 `52d147ba69b2035f`, 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/ht8051brtz-datasheet.pdf)