# RS2T45XM

**Jiangsu RUNIC Tech** · Gates · MSOP-8

RS2T45XM from Jiangsu RUNIC Tech, in a MSOP-8. 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 | VCCA | power_in | A-port supply voltage rail. Recommended operating range 1.65V ≤ VCCA ≤ 5.5V. DIR input threshold is referenced to VCCA. |
| 2 | A1 | bidirectional | A-port bidirectional data I/O bit 1. Logic levels referenced to VCCA. Drives up to ±24mA at 3V (±32mA at 4.5-5.5V). High-Z when DIR is high (A drives to B) is disabled - active when DIR=L (B→A). |
| 3 | A2 | bidirectional | A-port bidirectional data I/O bit 2. Logic levels referenced to VCCA. Drives up to ±24mA at 3V. |
| 4 | GND | power_in | Device ground return, 0V reference for both supplies. When either VCCA or VCCB is at GND the device enters suspend mode. |
| 5 | DIR | input | Direction control input, referenced to VCCA. DIR=L → B bus drives to A bus (A outputs enabled, B outputs Hi-Z); DIR=H → A drives to B (B outputs enabled, A outputs Hi-Z). Must be held at valid H/L to prevent excess ICC. |
| 6 | B2 | bidirectional | B-port bidirectional data I/O bit 2. Logic levels referenced to VCCB (1.65V-5.5V). |
| 7 | B1 | bidirectional | B-port bidirectional data I/O bit 1. Logic levels referenced to VCCB. |
| 8 | VCCB | power_in | B-port supply voltage rail. Recommended operating range 1.65V ≤ VCCB ≤ 5.5V. Either VCCA or VCCB may be ramped first (no sequencing required). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | MSOP-8 |
| Category | Logic |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `RS2T45XM`
- `RS2T45XMXH8`
- `RS2T45XMXVS8`

## CAD (KiCad official)

- Symbol: `RS2T45XM`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `rs2t45xm-etched.step` / `rs2t45xm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rs2t45xm.step` / `rs2t45xm.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Jiangsu RUNIC Tech datasheet](docs/rs2t45xm-datasheet.pdf) (17 pp, sha256 `e02b170617fa8783`, 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/rs2t45xm-datasheet.pdf)