# 74AHCT126S14-13

**Diodes Incorporated** · Logic ICs · SO-14

74AHCT126S14-13 from Diodes Incorporated, in a SO-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 data enable input; driving it low places output 1Y in the high-impedance state. |
| 2 | 1A | input | Data input for buffer 1, which drives output 1Y when enabled. |
| 3 | 1Y | output | 3-state data output of buffer 1. |
| 4 | 2OE | input | Active-high data enable input; driving it low places output 2Y in the high-impedance state. |
| 5 | 2A | input | Data input for buffer 2, which drives output 2Y when enabled. |
| 6 | 2Y | output | 3-state data output of buffer 2. |
| 7 | GND | power_in | Ground reference for the device. |
| 8 | 3Y | output | 3-state data output of buffer 3. |
| 9 | 3A | input | Data input for buffer 3, which drives output 3Y when enabled. |
| 10 | 3OE | input | Active-high data enable input; driving it low places output 3Y in the high-impedance state. |
| 11 | 4Y | output | 3-state data output of buffer 4. |
| 12 | 4A | input | Data input for buffer 4, which drives output 4Y when enabled. |
| 13 | 4OE | input | Active-high data enable input; driving it low places output 4Y in the high-impedance state. |
| 14 | VCC | power_in | Supply voltage, specified at 4.5V to 5.5V in the recommended operating conditions. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SO-14 |
| Category | Logic ICs |
| Pins | 14 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | -0.5 |  | 7 | V |  | 3 |
| Input Voltage Range | VI | -0.5 |  | 7 | V |  | 3 |
| Input Clamp Current | IIK | -20 |  |  | mA | VI < -0.5V | 3 |
| Output Clamp Current | IOK | -20 |  |  | mA | VO < 0 V | 3 |
| Output Clamp Current | IOK |  |  | 20 | mA | VO > VCC | 3 |
| Continuous Output Current | IO | -25 |  | 25 | mA | 0V < VO < VCC | 3 |
| Continuous Current Through VCC | ICC |  |  | 50 | mA |  | 3 |
| Continuous Current Through GND | IGND | -50 |  |  | mA |  | 3 |
| Operating Junction Temperature | TJ | -40 |  | 150 | °C |  | 3 |
| Storage Temperature | TSTG | -65 |  | 150 | °C |  | 3 |
| Total Power Dissipation | PTOT |  |  | 500 | mW |  | 3 |
| Supply Voltage | VCC | 4.5 |  | 5.5 | V |  | 3 |
| Input Voltage | VI | 0 |  | 5.5 | V |  | 3 |
| Output Voltage | VO | 0 |  |  | V | maximum is VCC | 3 |
| Input transition Rise or Fall Rate | ∆t/∆V |  |  | 20 | ns/V |  | 3 |
| Operating Free-Air Temperature | TA | -40 |  | 125 | °C |  | 3 |
| High-Level Input Voltage | VIH | 2 |  |  | V | VCC 4.5V to 5.5V, TA = -40°C to +125°C | 4 |
| Low-Level Input Voltage | VIL |  |  | 0.8 | V | VCC 4.5V to 5.5V, TA = -40°C to +125°C | 4 |
| High-Level Output Voltage | VOH | 4.4 |  |  | V | IOH = -50µA, VCC 4.5V, TA = -40°C to +125°C | 4 |
| High-Level Output Voltage | VOH | 3.7 |  |  | V | IOH = -8mA, VCC 4.5V, TA = -40°C to +125°C | 4 |
| Low-Level Output Voltage | VOL |  |  | 0.1 | V | IOL = 50µA, VCC 4.5V, TA = -40°C to +125°C | 4 |
| Low-Level Output Voltage | VOL |  |  | 0.55 | V | IOL = 8mA, VCC 4.5V, TA = -40°C to +125°C | 4 |
| Z State Leakage Current | IOZ | -10 |  | 10 | µA | VO = 0 to 5.5V, VCC 5.5V, TA = -40°C to +125°C | 4 |
| Input Current | II | -2 |  | 2 | µA | VI = GND to 5.5V, VCC 3.6V, TA = -40°C to +125°C | 4 |
| Supply Current | ICC |  |  | 40 | µA | VI = GND or VCC, IO = 0, VCC 3.6V, TA = -40°C to +125°C | 4 |
| Additional Supply Current | ∆ICC |  |  | 5 | mA | One input at VCC -2.1V, other pins at VCC or GND, VCC 5.5V, TA = -40°C to +125°C | 4 |
| Propagation Delay AN to YN | tPD | 0.5 | 3 | 7 | ns | Figure 1 CL = 15pF, VCC 4.5V to 5.5V; typ at TA = +25°C, min/max at TA = -40°C to +125°C | 4 |
| Propagation Delay AN to YN | tPD | 0.5 | 4.3 | 9.5 | ns | Figure 1 CL = 50pF, VCC 4.5V to 5.5V; typ at TA = +25°C, min/max at TA = -40°C to +125°C | 4 |
| Enable Time OEN to YN | tEN | 0.5 | 3.3 | 6.5 | ns | Figure 1 CL = 15 pF, VCC 4.5V to 5.5V; typ at TA = +25°C, min/max at TA = -40°C to +125°C | 4 |
| Enable Time OEN to YN | tEN | 0.5 | 4.7 | 9 | ns | Figure 1 CL = 50pF, VCC 4.5V to 5.5V; typ at TA = +25°C, min/max at TA = -40°C to +125°C | 4 |
| Disable Time OEN to YN | tDIS | 0.5 | 4.8 | 8.5 | ns | Figure 1 CL = 15pF, VCC 4.5V to 5.5V; typ at TA = +25°C, min/max at TA = -40°C to +125°C | 4 |
| Disable Time OEN to YN | tDIS | 0.5 | 6.5 | 11.5 | ns | Figure 1 CL = 50pF, VCC 4.5V to 5.5V; typ at TA = +25°C, min/max at TA = -40°C to +125°C | 4 |

## CAD (KiCad official)

- Symbol: `74AHCT126S14-13`
- Footprint: `Package_SO:SO-14_3.9x8.65mm_P1.27mm`
- 3D model: SO-14 (KiCad packages3D, STEP)
- 3D model files: `74ahct126s14-13-etched.step` / `74ahct126s14-13-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74ahct126s14-13.step` / `74ahct126s14-13.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/74AHCT126.pdf) (9 pp, sha256 `01531cedbdc9cf65`, retrieved 2026-10-29, 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/74ahct126s14-13-datasheet.pdf)