# SN64BCT125AD

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SOIC-14

SN64BCT125AD from Texas Instruments, in a SOIC-14. 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 buffer 1; when 1OE is high the 1Y output is disabled to the high-impedance state. |
| 2 | 1A | input | Data input to buffer 1, whose logic level is passed to output 1Y when 1OE is low. |
| 3 | 1Y | tri_state | 3-state output of buffer 1 that drives bus lines and goes high impedance when 1OE is high. |
| 4 | 2OE | input | Active-high output enable for buffer 2; when 2OE is high the 2Y output is disabled to the high-impedance state. |
| 5 | 2A | input | Data input to buffer 2, whose logic level is passed to output 2Y when 2OE is low. |
| 6 | 2Y | tri_state | 3-state output of buffer 2 that drives bus lines and goes high impedance when 2OE is high. |
| 7 | GND | power_in | Ground reference pin for the device. |
| 8 | 3Y | tri_state | 3-state output of buffer 3 that drives bus lines and goes high impedance when 3OE is high. |
| 9 | 3A | input | Data input to buffer 3, whose logic level is passed to output 3Y when 3OE is low. |
| 10 | 3OE | input | Active-high output enable for buffer 3; when 3OE is high the 3Y output is disabled to the high-impedance state. |
| 11 | 4Y | tri_state | 3-state output of buffer 4 that drives bus lines and goes high impedance when 4OE is high. |
| 12 | 4A | input | Data input to buffer 4, whose logic level is passed to output 4Y when 4OE is low. |
| 13 | 4OE | input | Active-high output enable for buffer 4; when 4OE is high the 4Y output is disabled to the high-impedance state. |
| 14 | VCC | power_in | Supply voltage pin; recommended operating range is 4.5 V to 5.5 V (5 V nominal). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Logic |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `SN64BCT125AD`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `sn64bct125ad-etched.step` / `sn64bct125ad-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn64bct125ad.step` / `sn64bct125ad.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/cn/lit/gpn/sn64bct125a) (10 pp, sha256 `ebb200af030db26b`, retrieved 2026-10-12, 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/sn64bct125ad-datasheet.pdf)