74AC14MTCX 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	I0	input	Schmitt-trigger input to inverter 0. VIH/VIL determined by hysteresis (typ 1.0 V). Input voltage range 0 V to VCC.
2	O0	output	Inverted output of gate 0. CMOS push-pull; sources/sinks 24 mA at 4.5 V VCC.
3	I1	input	Schmitt-trigger input to inverter 1. Input voltage range 0 V to VCC.
4	O1	output	Inverted output of gate 1. Sources/sinks 24 mA at 4.5 V VCC.
5	I2	input	Schmitt-trigger input to inverter 2. Input voltage range 0 V to VCC.
6	O2	output	Inverted output of gate 2. Sources/sinks 24 mA at 4.5 V VCC.
7	GND	power_in	Ground reference. 0 V return for logic and outputs.
8	O3	output	Inverted output of gate 3. Sources/sinks 24 mA at 4.5 V VCC.
9	I3	input	Schmitt-trigger input to inverter 3. Input voltage range 0 V to VCC.
10	O4	output	Inverted output of gate 4. Sources/sinks 24 mA at 4.5 V VCC.
11	I4	input	Schmitt-trigger input to inverter 4. Input voltage range 0 V to VCC.
12	O5	output	Inverted output of gate 5. Sources/sinks 24 mA at 4.5 V VCC.
13	I5	input	Schmitt-trigger input to inverter 5. Input voltage range 0 V to VCC.
14	VCC	power_in	Positive supply. Recommended range 2.0 V to 6.0 V (74AC14). Bypass with 0.1 µF ceramic close to the pin.

Key specifications

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

Ordering variants

74AC14MTCX
74AC14MTCX74ACT14MTC
74AC14MTCX74ACT14MTCX
74AC14MTCX74AC14SC
74AC14MTCX74ACT14SC
74AC14MTCX74AC14SJ

CAD (KiCad official)

Symbol: 74AC14MTCX
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`74ac14mtcx.step`	194 KB	You want the bare part, or you mark your own boards.
`74ac14mtcx-etched.step`	1.8 MB	You want the part with `74AC14MTCX` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 494 faces against 237 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: onsemi datasheet (11 pp, sha256 55b38a20d0b6505d, retrieved 2026-08-17, tier: lcsc)
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