# 74CBTLV3257PW

**Nexperia** · Signal Switches, Multiplexers, Decoders · TSSOP-16

74CBTLV3257PW from Nexperia, in a TSSOP-16. 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 | S | input | Select input that chooses the B port for each switch when OE is LOW: S = L connects nA to nB1, S = H connects nA to nB2. |
| 2 | 1B1 | bidirectional | B1 input/output of switch 1; connected to 1A when OE is LOW and S is LOW, and disconnected when OE is HIGH. |
| 3 | 1B2 | bidirectional | B2 input/output of switch 1; connected to 1A when OE is LOW and S is HIGH, and disconnected when OE is HIGH. |
| 4 | 1A | bidirectional | A input/output of switch 1; common port that follows 1B1 or 1B2 selected by S when OE is LOW, and goes high-impedance when OE is HIGH. |
| 5 | 2B1 | bidirectional | B1 input/output of switch 2; connected to 2A when OE is LOW and S is LOW, and disconnected when OE is HIGH. |
| 6 | 2B2 | bidirectional | B2 input/output of switch 2; connected to 2A when OE is LOW and S is HIGH, and disconnected when OE is HIGH. |
| 7 | 2A | bidirectional | A input/output of switch 2; common port that follows 2B1 or 2B2 selected by S when OE is LOW, and goes high-impedance when OE is HIGH. |
| 8 | GND | power_in | Ground (0 V) reference for all voltages on the device. |
| 9 | 3A | bidirectional | A input/output of switch 3; common port that follows 3B1 or 3B2 selected by S when OE is LOW, and goes high-impedance when OE is HIGH. |
| 10 | 3B2 | bidirectional | B2 input/output of switch 3; connected to 3A when OE is LOW and S is HIGH, and disconnected when OE is HIGH. |
| 11 | 3B1 | bidirectional | B1 input/output of switch 3; connected to 3A when OE is LOW and S is LOW, and disconnected when OE is HIGH. |
| 12 | 4A | bidirectional | A input/output of switch 4; common port that follows 4B1 or 4B2 selected by S when OE is LOW, and goes high-impedance when OE is HIGH. |
| 13 | 4B2 | bidirectional | B2 input/output of switch 4; connected to 4A when OE is LOW and S is HIGH, and disconnected when OE is HIGH. |
| 14 | 4B1 | bidirectional | B1 input/output of switch 4; connected to 4A when OE is LOW and S is LOW, and disconnected when OE is HIGH. |
| 15 | OE | input | Output enable input (active LOW); LOW enables the switch selected by S, and HIGH puts all switches in the high-impedance OFF-state, so OE should be tied to VCC through a pull-up resistor during power-up or power-down. |
| 16 | VCC | power_in | Supply voltage; recommended operating range is 2.3 V to 3.6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | TSSOP-16 |
| Category | Logic |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `74CBTLV3257PW`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `74cbtlv3257pw-etched.step` / `74cbtlv3257pw-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74cbtlv3257pw.step` / `74cbtlv3257pw.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588908420707045376) (21 pp, sha256 `7f71a4c9b6643bae`, retrieved 2026-10-10, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/74cbtlv3257pw-datasheet.pdf)