# SN74CBTLV3245APWR

**Texas Instruments** · Analog Switches, Multiplexers · TSSOP-20

SN74CBTLV3245APWR from Texas Instruments, in a TSSOP-20. 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 | NC | unconnected | No internal connection; can be shorted to GND or left floating. |
| 2 | A1 | bidirectional | Data input/output pin; connects to B1 when OE is low. |
| 3 | A2 | bidirectional | Data input/output pin; connects to B2 when OE is low. |
| 4 | A3 | bidirectional | Data input/output pin; connects to B3 when OE is low. |
| 5 | A4 | bidirectional | Data input/output pin; connects to B4 when OE is low. |
| 6 | A5 | bidirectional | Data input/output pin; connects to B5 when OE is low. |
| 7 | A6 | bidirectional | Data input/output pin; connects to B6 when OE is low. |
| 8 | A7 | bidirectional | Data input/output pin; connects to B7 when OE is low. |
| 9 | A8 | bidirectional | Data input/output pin; connects to B8 when OE is low. |
| 10 | GND | power_in | Ground pin. |
| 11 | B8 | bidirectional | Data input/output pin; connects to A8 when OE is low. |
| 12 | B7 | bidirectional | Data input/output pin; connects to A7 when OE is low. |
| 13 | B6 | bidirectional | Data input/output pin; connects to A6 when OE is low. |
| 14 | B5 | bidirectional | Data input/output pin; connects to A5 when OE is low. |
| 15 | B4 | bidirectional | Data input/output pin; connects to A4 when OE is low. |
| 16 | B3 | bidirectional | Data input/output pin; connects to A3 when OE is low. |
| 17 | B2 | bidirectional | Data input/output pin; connects to A2 when OE is low. |
| 18 | B1 | bidirectional | Data input/output pin; connects to A1 when OE is low. |
| 19 | OE | input | Output Enable control input; low enables switching, high disables switching and provides high-impedance. |
| 20 | VCC | power_in | Positive power supply pin; operating voltage 2.3 to 3.6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Interface |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74CBTLV3245APWR`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `sn74cbtlv3245apwr-etched.step` / `sn74cbtlv3245apwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74cbtlv3245apwr.step` / `sn74cbtlv3245apwr.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/sn74cbtlv3245a.pdf) (45 pp, sha256 `2d8191509047c87e`, retrieved 2026-10-01, 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/sn74cbtlv3245apwr-datasheet.pdf)