# RH791A

**RONGHE Microelectronics** · USB Converters · SOT-23-5L

RH791A from RONGHE Microelectronics, in a SOT-23-5L. 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 | NC | unconnected | No connect. Pin is not internally bonded; leave floating or tie as convenient during PCB layout. |
| 2 | GND | power_in | Negative supply / ground return for the device. Connect to the system 0 V rail. |
| 3 | VDD | power_in | Positive supply, 4.5-5.5 V (typ. 5.0 V). Typical operating current 140 uA. A ~500 Ω-1 kΩ series resistor from VBUS and a 1 uF bypass cap to GND are recommended to guard against AC-DC overshoot up to 7-9 V. |
| 4 | DP | bidirectional | USB D+ data line to the downstream USB connector. Driven to 2.7 V (Divider3, 12 W Apple) typical; also supports 1.2 V (Samsung), short-to-DM (BC1.2 DCP / CTIS YD/T 1591-2009). ESD >6.5 kV HBM. |
| 5 | DM | bidirectional | USB D- data line to the downstream USB connector. Driven to 2.7 V (Divider3, 12 W Apple) typical; also supports 1.2 V (Samsung), short-to-DP (BC1.2 DCP / CTIS YD/T 1591-2009). ESD >6.5 kV HBM. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RONGHE Microelectronics |
| Package | SOT-23-5L |
| Category | Interface |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `RH791A`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files: `rh791a-etched.step` / `rh791a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rh791a.step` / `rh791a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [RONGHE Microelectronics datasheet](docs/rh791a-datasheet.pdf) (7 pp, sha256 `858bd6993b5b7770`, retrieved 2026-08-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/rh791a-datasheet.pdf)