# SN74AHCT126DBR

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SSOP-14-208mil

SN74AHCT126DBR from Texas Instruments, in a SSOP-14-208mil. 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 | Output Enable 1 input, active high; when high, output 1Y is enabled; when low, 1Y is high-impedance |
| 2 | 1A | input | Data input for buffer 1; passed to 1Y when 1OE is high |
| 3 | 1Y | tri_state | Tri-state output of buffer 1; buffers data from 1A when 1OE is high, high-impedance when 1OE is low |
| 4 | 2OE | input | Output Enable 2 input, active high; when high, output 2Y is enabled; when low, 2Y is high-impedance |
| 5 | 2A | input | Data input for buffer 2; passed to 2Y when 2OE is high |
| 6 | 2Y | tri_state | Tri-state output of buffer 2; buffers data from 2A when 2OE is high, high-impedance when 2OE is low |
| 7 | GND | power_in | Ground pin |
| 8 | 3Y | tri_state | Tri-state output of buffer 3; buffers data from 3A when 3OE is high, high-impedance when 3OE is low |
| 9 | 3A | input | Data input for buffer 3; passed to 3Y when 3OE is high |
| 10 | 3OE | input | Output Enable 3 input, active high; when high, output 3Y is enabled; when low, 3Y is high-impedance |
| 11 | 4Y | tri_state | Tri-state output of buffer 4; buffers data from 4A when 4OE is high, high-impedance when 4OE is low |
| 12 | 4A | input | Data input for buffer 4; passed to 4Y when 4OE is high |
| 13 | 4OE | input | Output Enable 4 input, active high; when high, output 4Y is enabled; when low, 4Y is high-impedance |
| 14 | VCC | power_in | Supply voltage pin, 4.5 V to 5.5 V nominal |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-14-208mil |
| Category | Logic |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `SN74AHCT126DBR`
- Footprint: `Package_SO:SSOP-14_5.3x6.2mm_P0.65mm`
- 3D model: SSOP-14-208mil (KiCad packages3D, STEP)
- 3D model files: `sn74ahct126dbr-etched.step` / `sn74ahct126dbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ahct126dbr.step` / `sn74ahct126dbr.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/sn74ahct126) (36 pp, sha256 `530e7e17dc890bb7`, retrieved 2026-09-24, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-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/sn74ahct126dbr-datasheet.pdf)