# SN74CB3T1G125DCKR

**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SC-70-5

SN74CB3T1G125DCKR from Texas Instruments, in a SC-70-5. 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 | OE | input | Active-low output enable: low turns the A-B switch ON, high gives a high-impedance state between A and B; control input accepts TTL or 5-V/3.3-V CMOS levels (VIH 1.7 V min at VCC 2.3-2.7 V, 2 V min at 2.7-3.6 V, up to 5.5 V). |
| 2 | A | bidirectional | Bidirectional switch data I/O port A, connected to B when OE is low and supporting 0- to 5.5-V signal levels. |
| 3 | GND | power_in | Ground. |
| 4 | B | bidirectional | Bidirectional switch data I/O port B, connected to A when OE is low, with output voltage translation tracking VCC and 0- to 5.5-V signal levels. |
| 5 | VCC | power_in | Supply voltage, 2.3 V to 3.6 V recommended operating range (absolute maximum 7 V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SC-70-5 |
| Category | Logic |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `SN74CB3T1G125DCKR`
- Footprint: `Package_TO_SOT_SMD:SOT-353_SC-70-5`
- 3D model: SC-70-5 (KiCad packages3D, STEP)
- 3D model files: `sn74cb3t1g125dckr-etched.step` / `sn74cb3t1g125dckr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74cb3t1g125dckr.step` / `sn74cb3t1g125dckr.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/sn74cb3t1g125.pdf) (18 pp, sha256 `c85b9867c881127e`, retrieved 2026-10-10, tier: manufacturer)
- **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/sn74cb3t1g125dckr-datasheet.pdf)