# MM74HC14MTCX

**onsemi** · Inverters · TSSOP-14

MM74HC14MTCX from onsemi, in a TSSOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | A1 | input | Schmitt-trigger input to inverter 1. VT+ typ 2.7 V, VT- typ 1.8 V at VCC = 4.5 V; hysteresis typ 0.9 V. Max input current ±1 µA. |
| 2 | Y1 | output | Inverted Schmitt-trigger output of gate 1 (Y1 = !A1). Drives ±4 mA at VCC = 4.5 V (VOH ≥ 3.98 V, VOL ≤ 0.26 V). |
| 3 | A2 | input | Schmitt-trigger input to inverter 2. Same thresholds and hysteresis as A1. |
| 4 | Y2 | output | Inverted Schmitt-trigger output of gate 2 (Y2 = !A2). |
| 5 | A3 | input | Schmitt-trigger input to inverter 3. |
| 6 | Y3 | output | Inverted Schmitt-trigger output of gate 3 (Y3 = !A3). |
| 7 | GND | power_in | Ground reference (0 V). Common return for VCC. |
| 8 | Y4 | output | Inverted Schmitt-trigger output of gate 4 (Y4 = !A4). |
| 9 | A4 | input | Schmitt-trigger input to inverter 4. |
| 10 | Y5 | output | Inverted Schmitt-trigger output of gate 5 (Y5 = !A5). |
| 11 | A5 | input | Schmitt-trigger input to inverter 5. |
| 12 | Y6 | output | Inverted Schmitt-trigger output of gate 6 (Y6 = !A6). |
| 13 | A6 | input | Schmitt-trigger input to inverter 6. |
| 14 | VCC | power_in | Positive supply. Recommended 2 V to 6 V; absolute max 7.0 V. Quiescent supply current typ 2 µA (max 20 µA at 25 °C). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSSOP-14 |
| Category | Logic |
| Pins | 14 |

## Ordering variants

Same part, different packaging or reel option.

- `MM74HC14MTCX`
- `MM74HC14MTCXM`
- `MM74HC14MTCXSJ`
- `MM74HC14MTCXN`

## CAD (KiCad official)

- Symbol: `MM74HC14MTCX`
- Footprint: `Package_SO:TSSOP-14_4.4x5mm_P0.65mm`
- 3D model: TSSOP-14 (KiCad packages3D, STEP)
- 3D model files: `mm74hc14mtcx-etched.step` / `mm74hc14mtcx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mm74hc14mtcx.step` / `mm74hc14mtcx.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mm74hc14mtcx-d.pdf) (10 pp, sha256 `e3bbc5909972bfbd`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/mm74hc14mtcx-datasheet.pdf)