# SN74CB3Q3305PWR

**Texas Instruments** · Signal Switches, Multiplexers, Decoders · TSSOP-8

SN74CB3Q3305PWR from Texas Instruments, in a TSSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1OE | input | Active-high output enable for switch 1; when high connects 1A to 1B with 3Ω typical ON-state resistance; requires 0.7V to 2V input level (VCC-dependent). |
| 2 | 1A | bidirectional | Bidirectional data I/O port for channel 1 supporting 0-5V signals with 3Ω typical ON-state resistance when enabled; includes undershoot clamp diode. |
| 3 | 1B | bidirectional | Bidirectional data I/O port for channel 1 supporting 0-5V signals with 3Ω typical ON-state resistance when enabled; includes undershoot clamp diode. |
| 4 | GND | power_in | Ground return connection supporting ±100mA continuous current for device and signal paths. |
| 5 | 2A | bidirectional | Bidirectional data I/O port for channel 2 supporting 0-5V signals with 3Ω typical ON-state resistance when enabled; includes undershoot clamp diode. |
| 6 | 2B | bidirectional | Bidirectional data I/O port for channel 2 supporting 0-5V signals with 3Ω typical ON-state resistance when enabled; includes undershoot clamp diode. |
| 7 | 2OE | input | Active-high output enable for switch 2; when high connects 2A to 2B with 3Ω typical ON-state resistance; requires 0.7V to 2V input level (VCC-dependent). |
| 8 | VCC | power_in | Positive supply voltage input in range 2.3V to 3.6V supporting ±100mA continuous current; powers internal charge pump and digital logic. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-8 |
| Category | Logic |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SN74CB3Q3305PWR`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `sn74cb3q3305pwr-etched.step` / `sn74cb3q3305pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74cb3q3305pwr.step` / `sn74cb3q3305pwr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn74cb3q3305.pdf) (23 pp, sha256 `b4a77a5460a18d7c`, retrieved 2026-10-05, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sn74cb3q3305pwr-datasheet.pdf)