74HC14 hex Schmitt-trigger inverter
Six independent inverters with Schmitt-trigger inputs and push-pull outputs.
Pinout
Arrows show signal direction between paired pins.
12 · 6Y
Push-pull output · 0 V to VCC
Connect to a compatible logic input. Leave it open when unused. Avoid tying push-pull outputs together.
All 14 pins
| Pin | Name | Role | Range |
|---|---|---|---|
| 1 | 1A | Schmitt-trigger input | 0 V to VCC |
| 2 | 1Y | Push-pull output | 0 V to VCC |
| 3 | 2A | Schmitt-trigger input | 0 V to VCC |
| 4 | 2Y | Push-pull output | 0 V to VCC |
| 5 | 3A | Schmitt-trigger input | 0 V to VCC |
| 6 | 3Y | Push-pull output | 0 V to VCC |
| 7 | GND | Ground reference | 0 V |
| 8 | 4Y | Push-pull output | 0 V to VCC |
| 9 | 4A | Schmitt-trigger input | 0 V to VCC |
| 10 | 5Y | Push-pull output | 0 V to VCC |
| 11 | 5A | Schmitt-trigger input | 0 V to VCC |
| 12 | 6Y | Push-pull output | 0 V to VCC |
| 13 | 6A | Schmitt-trigger input | 0 V to VCC |
| 14 | VCC | Positive supply | 2–6 V |
Inverter channels
Each channel has a fixed input and output. Below the falling threshold A reads LOW and Y is HIGH. Above the rising threshold A reads HIGH and Y is LOW. Between the two thresholds of a given gate, Y retains its previous state while powered.
Electrical limits
Recommended operation for TI SN74HC14 is VCC 2–6 V, free-air temperature −40 to +85 °C, and input and output voltages within the supply rails. All voltages are relative to GND.
Schmitt thresholds and hysteresis
Entries are min / typ / max in volts. Limits cover −40 to +85 °C. Typical values are at 25 °C.
| VCC | Rising Vₜ₊ | Falling Vₜ₋ | Hysteresis ΔVₜ |
|---|---|---|---|
| 2 V | 0.7 / 1.2 / 1.5 | 0.3 / 0.6 / 1 | 0.2 / 0.6 / 1.2 |
| 4.5 V | 1.55 / 2.5 / 3.13 | 0.9 / 1.6 / 2.45 | 0.4 / 0.9 / 2.1 |
| 6 V | 2.1 / 3.3 / 4.2 | 1.2 / 2 / 3.2 | 0.5 / 1.3 / 2.5 |
To guarantee switching across parts, drive above the rising maximum for HIGH and below the falling minimum for LOW. At 4.5 V, those boundaries are 3.13 V and 0.90 V respectively. The two threshold ranges describe variation across parts. Use the specified ΔVₜ for the threshold separation of one gate.
TI specifies no input transition-rate limit for this device. Slow edges can increase supply current. Check logic levels at the actual supply voltage. TI tabulates threshold limits at 2 V, 4.5 V and 6 V. The input clamp diodes make power sequencing and rail compatibility important when connecting another voltage domain.
Output levels at 4.5 V
| Output load magnitude | VOL max | VOH min |
|---|---|---|
| 20 µA | ≤ 0.1 V | ≥ 4.4 V |
| 4 mA | 0.33 V | 3.84 V |
Limits apply over −40 to +85 °C with a valid LOW or HIGH input. At 4.5 V and 50 pF, propagation delay is 12 ns typical at 25 °C and 31 ns maximum across the operating temperature range.
TI SCLS085L §§ 5.3, 5.5 and 5.7 specify operating and switching limits. The absolute maximum current ratings in § 5.1 are stress limits.
Package and documents
TI package code N · 19.3 × 6.35 mm nominal body · 2.54 mm lead pitch. Use TI’s package outline for footprint dimensions and tolerances.
TI lists these active order codes in its 18 September 2026 addendum. SN74HC14N, SN74HC14N.A, SN74HC14NE4.
- TI N package drawing (PDF)
- TI SNx4HC14 datasheet (PDF)· SCLS085L, Rev. L (February 2025), with package option addendum
- TI SN74HC14 product and ordering information
- TI Understanding Schmitt Triggers· SCEA046B, Rev. B (April 2025). Slow edges, noise, hysteresis and switch filtering.
TI SCLS085L § 4 shows the top-view pin assignments. § 11 includes the package option addendum and outline drawings.