# SN74AHC126DBR

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

SN74AHC126DBR 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 | Channel 1 output enable; the Y output is in the high-impedance state when OE is low and follows A when OE is high. |
| 2 | 1A | input | Channel 1 A input; unused inputs must be held at VCC or GND, with an input range of 0 to 5.5 V. |
| 3 | 1Y | output | Channel 1 3-state Y output, recommended IOH/IOL of ±8 mA at VCC = 5 V ± 0.5 V. |
| 4 | 2OE | input | Channel 2 output enable; the Y output is in the high-impedance state when OE is low and follows A when OE is high. |
| 5 | 2A | input | Channel 2 A input; unused inputs must be held at VCC or GND, with an input range of 0 to 5.5 V. |
| 6 | 2Y | output | Channel 2 3-state Y output, recommended IOH/IOL of ±8 mA at VCC = 5 V ± 0.5 V. |
| 7 | GND | power_in | Ground; continuous current through VCC or GND is limited to ±50 mA. |
| 8 | 3Y | output | Channel 3 3-state Y output, recommended IOH/IOL of ±8 mA at VCC = 5 V ± 0.5 V. |
| 9 | 3A | input | Channel 3 A input; unused inputs must be held at VCC or GND, with an input range of 0 to 5.5 V. |
| 10 | 3OE | input | Channel 3 output enable; the Y output is in the high-impedance state when OE is low and follows A when OE is high. |
| 11 | 4Y | output | Channel 4 3-state Y output, recommended IOH/IOL of ±8 mA at VCC = 5 V ± 0.5 V. |
| 12 | 4A | input | Channel 4 A input; unused inputs must be held at VCC or GND, with an input range of 0 to 5.5 V. |
| 13 | 4OE | input | Channel 4 output enable; the Y output is in the high-impedance state when OE is low and follows A when OE is high. |
| 14 | VCC | power_in | Positive supply with a recommended range of 2 V to 5.5 V and an absolute maximum of 7 V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SN74AHC126DBR`
- Footprint: `Package_SO:SSOP-14_5.3x6.2mm_P0.65mm`
- 3D model: SSOP-14-208mil (KiCad packages3D, STEP)
- 3D model files: `sn74ahc126dbr-etched.step` / `sn74ahc126dbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ahc126dbr.step` / `sn74ahc126dbr.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/sn74ahc126.pdf) (38 pp, sha256 `f61ba951a6c6ab05`, retrieved 2026-11-05, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/sn74ahc126dbr-datasheet.pdf)