# BSP742TXUMA1

**Infineon Technologies** · Power Distribution Switches · SOP-8

BSP742TXUMA1 from Infineon Technologies, in a SOP-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 | GND | power_in | Logic ground reference for the device. An external ~150 Ω resistor in the GND connection is required for reverse-battery protection and for external current limiting when V_bb exceeds V_bb(AZ) (~41 V). |
| 2 | IN | input | CMOS-compatible logic input; a logic-high signal activates the high-side power switch. V_IN(T+) ≤ 2.2 V (turn-on), V_IN(T-) ≥ 0.8 V (turn-off), typical hysteresis 0.3 V. Input resistance R_I ≈ 1.5-5 kΩ (typ. 3.5 kΩ); continuous input voltage range −10…+16 V, input current limited to ±5 mA. |
| 3 | OUT | output | Protected high-side power output to the load. Sources current from V_bb through the internal N-channel power FET; typical R_ON = 260 mΩ (max 350 mΩ at 25 °C), nominal load current 0.8 A. Inductive switch-off clamp V_ON(CL) typ. 47 V (min 41 V). |
| 4 | NC | unconnected | Not connected - no internal bond; leave floating or tie as required by PCB layout. |
| 5 | Vbb | power_in | Positive supply / battery input. Operating range 5-34 V (absolute max 40 V, 30 V for full short-circuit protection); overvoltage clamp V_bb(AZ) = 41 V. Pin 5 is one of four Vbb pins tied together (5, 6, 7, 8) for current handling and thermal path. |
| 6 | Vbb | power_in | Positive supply / battery input (paralleled with pins 5, 7, 8). Operating range 5-34 V, overvoltage clamp 41 V. |
| 7 | Vbb | power_in | Positive supply / battery input (paralleled with pins 5, 6, 8). Operating range 5-34 V, overvoltage clamp 41 V. |
| 8 | Vbb | power_in | Positive supply / battery input (paralleled with pins 5, 6, 7). Operating range 5-34 V, overvoltage clamp 41 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Infineon Technologies |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `BSP742TXUMA1`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `bsp742txuma1-etched.step` / `bsp742txuma1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bsp742txuma1.step` / `bsp742txuma1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Infineon Technologies datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930313858375680) (None pp, sha256 `5edd600f477bd20f`, 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/bsp742txuma1-datasheet.pdf)