# U74ACT08G

**UTC Unisonic Tech** · Logic Gates · SOP-14

U74ACT08G from UTC Unisonic Tech, in a SOP-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 | 1A | input | Input A of gate 1; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 2 | 1B | input | Input B of gate 1; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 3 | 1Y | output | Output of gate 1 (Y = A·B); output current is limited to ±50 mA absolute maximum. |
| 4 | 2A | input | Input A of gate 2; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 5 | 2B | input | Input B of gate 2; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 6 | 2Y | output | Output of gate 2 (Y = A·B); output current is limited to ±50 mA absolute maximum. |
| 7 | GND | power_in | Ground reference pin for the device. |
| 8 | 3Y | output | Output of gate 3 (Y = A·B); output current is limited to ±50 mA absolute maximum. |
| 9 | 3A | input | Input A of gate 3; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 10 | 3B | input | Input B of gate 3; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 11 | 4Y | output | Output of gate 4 (Y = A·B); output current is limited to ±50 mA absolute maximum. |
| 12 | 4A | input | Input A of gate 4; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 13 | 4B | input | Input B of gate 4; the gate implements Y = A·B, and the inputs are TTL-compatible. |
| 14 | VCC | power_in | Positive supply; recommended operating range is 4.5 V to 5.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOP-14 |
| Category | Logic |
| 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 | VIN | -0.5 |  |  | V |  | 3 |
| DC Output Voltage | VOUT | -0.5 |  |  | V |  | 3 |
| Input Clamp Current (VIN<0) | IIK | -20 |  | 20 | mA |  | 3 |
| Output Clamp Current (VOUT<0) | IOK | -20 |  | 20 | mA |  | 3 |
| Output Current | IOUT | -50 |  | 50 | mA |  | 3 |
| VCC or GND Current | ICC | -200 |  | 200 | mA |  | 3 |
| Storage Temperature | TSTG | -65 |  | 150 | °C |  | 3 |
| Supply Voltage | VCC | 4.5 |  | 5.5 | V |  | 3 |
| Input Voltage | VIN | 0 |  |  | V |  | 3 |
| Output Voltage | VOUT | 0 |  |  | V |  | 3 |
| Input Transition Rise or Fall Rate | t/v |  |  | 8 | ns/V |  | 3 |
| Operating Temperature | TA | -40 |  | 125 | °C |  | 3 |
| High-Level Input Voltage | VIH | 2 |  |  | V | VCC=4.5V~5.5V | 3 |
| Low-Level Input Voltage | VIL |  |  | 0.8 | V | VCC=4.5V~5.5V | 3 |
| High-Level Output Voltage | VOH | 3.86 |  |  | V | VCC=4.5V IOH=-24mA | 3 |
| High-Level Output Voltage | VOH | 4.4 | 4.49 |  | V | VCC=4.5V IOH=-50μA | 3 |
| High-Level Output Voltage | VOH | 4.86 |  |  | V | VCC=5.5V IOH=-24mA | 3 |
| High-Level Output Voltage | VOH | 5.4 | 5.49 |  | V | VCC=5.5V IOH=-50μA | 3 |
| Low-Level Output Voltage | VOL |  |  | 0.36 | V | VCC=4.5V IOL=24mA | 3 |
| Low-Level Output Voltage | VOL |  | 0.001 | 0.1 | V | VCC=4.5V IOL=50μA | 3 |
| Input Leakage Current | II(LEAK) | -0.1 |  | 0.1 | μA | VCC=5.5V, VIN=5.5V or GND | 3 |
| Quiescent Supply Current | IQ |  |  | 4 | μA | VCC=5.5V, VIN=VCC or GND IOUT=0 | 3 |
| Additional Quiescent Supply Current Per Input Pin | ΔIQ |  |  | 0.6 | mA | VCC=5.5V, VIN=3.4V; other input at VCC or GND; IOUT=0 | 3 |
| Propagation Delay Time | tPLH / tPHL | 1.5 | 5 | 9 | ns | VCC =5.0V±0.5V, CL =50pF, RL =500Ω | 3 |
| Input Capacitance | CIN |  | 4 |  | pF | VCC=5.0V, VIN=VCC or GND | 3 |
| Power Dissipation Capacitance | CPD |  | 30 |  | pF | VCC =5.0V | 3 |

## CAD (KiCad official)

- Symbol: `U74ACT08G`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files: `u74act08g-etched.step` / `u74act08g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `u74act08g.step` / `u74act08g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UTC Unisonic Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602990146291978240) (4 pp, sha256 `ec0bb4186cf20e2e`, retrieved 2026-10-18, tier: lcsc)
- **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/u74act08g-datasheet.pdf)