# 74VHCT125AFT

**TOSHIBA** · Buffers, Drivers, Receivers, Transceivers · TSSOP-14

74VHCT125AFT from TOSHIBA, in a TSSOP-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 | 1G | input | Active-low 3-state control input for buffer 1; high places 1Y in high impedance (74VHCT125AFT). |
| 2 | 1A | input | Data input of buffer 1; TTL-compatible, 0 to 5.5 V, VIL 0.8 V max, VIH 2.0 V min. |
| 3 | 1Y | tri_state | 3-state non-inverted output of buffer 1; high impedance when 1G is high. |
| 4 | 2G | input | Active-low 3-state control input for buffer 2; high places 2Y in high impedance (74VHCT125AFT). |
| 5 | 2A | input | Data input of buffer 2; TTL-compatible, 0 to 5.5 V, VIL 0.8 V max, VIH 2.0 V min. |
| 6 | 2Y | tri_state | 3-state non-inverted output of buffer 2; high impedance when 2G is high. |
| 7 | GND | power_in | Ground (0 V) pin. |
| 8 | 3Y | tri_state | 3-state non-inverted output of buffer 3; high impedance when 3G is high. |
| 9 | 3A | input | Data input of buffer 3; TTL-compatible, 0 to 5.5 V, VIL 0.8 V max, VIH 2.0 V min. |
| 10 | 3G | input | Active-low 3-state control input for buffer 3; high places 3Y in high impedance (74VHCT125AFT). |
| 11 | 4Y | tri_state | 3-state non-inverted output of buffer 4; high impedance when 4G is high. |
| 12 | 4A | input | Data input of buffer 4; TTL-compatible, 0 to 5.5 V, VIL 0.8 V max, VIH 2.0 V min. |
| 13 | 4G | input | Active-low 3-state control input for buffer 4; high places 4Y in high impedance (74VHCT125AFT). |
| 14 | VCC | power_in | Supply voltage pin; operating range 4.5 to 5.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TOSHIBA |
| Package | TSSOP-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 (absolute maximum) | VCC | -0.5 |  | 7 | V |  | 3 |
| Input voltage (absolute maximum) | VIN | -0.5 |  | 7 | V |  | 3 |
| Output voltage (absolute maximum) | VOUT | -0.5 |  | 7 | V | Note 1: output in OFF state | 3 |
| Input diode current (absolute maximum) | IIK | -20 |  |  | mA |  | 3 |
| Output diode current (absolute maximum) | IOK | -20 |  | 20 | mA | Note 3: VOUT < GND, VOUT > VCC | 3 |
| Output current (absolute maximum) | IOUT | -25 |  | 25 | mA | Note 2: H or L state | 3 |
| VCC/ground current (absolute maximum) | ICC | -50 |  | 50 | mA |  | 3 |
| Power dissipation (absolute maximum) | PD |  |  | 180 | mW | Note 4: Ta = -40 to 85 °C; from Ta = 85 to 125 °C derate -3.25 mW/°C until 50 mW | 3 |
| Storage temperature (absolute maximum) | Tstg | -65 |  | 150 | °C |  | 3 |
| Supply voltage (operating range) | VCC | 4.5 |  | 5.5 | V |  | 3 |
| Input voltage (operating range) | VIN | 0 |  | 5.5 | V |  | 3 |
| Output voltage (operating range, OFF state) | VOUT | 0 |  | 5.5 | V | Note 1: output in OFF state | 3 |
| Output voltage (operating range, H or L state) | VOUT | 0 |  |  | V | max = VCC as printed; Note 2: H or L state | 3 |
| Operating temperature | Topr | -40 |  | 125 | °C |  | 3 |
| Input rise and fall time | dt/dv | 0 |  | 20 | ns/V |  | 3 |
| High-level input voltage (Ta = 25 °C) | VIH | 2 |  |  | V | Ta = 25 °C; VCC = 4.5 to 5.5 V | 4 |
| Low-level input voltage (Ta = 25 °C) | VIL |  |  | 0.8 | V | Ta = 25 °C; VCC = 4.5 to 5.5 V | 4 |
| High-level output voltage (Ta = 25 °C) | VOH | 4.4 | 4.5 |  | V | Ta = 25 °C; IOH = -50 µA; VCC = 4.5 V | 4 |
| High-level output voltage (Ta = 25 °C) | VOH | 3.94 |  |  | V | Ta = 25 °C; IOH = -8 mA; VCC = 4.5 V | 4 |
| Low-level output voltage (Ta = 25 °C) | VOL |  | 0 | 0.1 | V | Ta = 25 °C; IOL = 50 µA; VCC = 4.5 V | 4 |
| Low-level output voltage (Ta = 25 °C) | VOL |  |  | 0.36 | V | Ta = 25 °C; IOL = 8 mA; VCC = 4.5 V | 4 |
| 3-state output OFF-state leakage current (Ta = 25 °C) | IOZ | -0.25 |  | 0.25 | µA | Ta = 25 °C; VOUT = VCC or GND | 4 |
| Input leakage current (Ta = 25 °C) | IIN | -0.1 |  | 0.1 | µA | Ta = 25 °C; VIN = 5.5 V or GND | 4 |
| Quiescent supply current (Ta = 25 °C) | ICC |  |  | 4 | µA | Ta = 25 °C; VIN = VCC or GND | 4 |
| Quiescent supply current per input (Ta = 25 °C) | ICCT |  |  | 1.35 | mA | Ta = 25 °C; per input VIN = 3.4 V; other input VCC or GND | 4 |
| Output leakage current, power-OFF (Ta = 25 °C) | IOPD |  |  | 0.5 | µA | Ta = 25 °C; VOUT = 5.5 V | 4 |
| High-level input voltage (Ta = -40 to 85 °C) | VIH | 2 |  |  | V | Ta = -40 to 85 °C; VCC = 4.5 to 5.5 V | 4 |
| Low-level input voltage (Ta = -40 to 85 °C) | VIL |  |  | 0.8 | V | Ta = -40 to 85 °C; VCC = 4.5 to 5.5 V | 4 |
| High-level output voltage (Ta = -40 to 85 °C) | VOH | 4.4 |  |  | V | Ta = -40 to 85 °C; IOH = -50 µA; VCC = 4.5 V | 4 |
| High-level output voltage (Ta = -40 to 85 °C) | VOH | 3.8 |  |  | V | Ta = -40 to 85 °C; IOH = -8 mA; VCC = 4.5 V | 4 |
| Low-level output voltage (Ta = -40 to 85 °C) | VOL |  |  | 0.1 | V | Ta = -40 to 85 °C; IOL = 50 µA; VCC = 4.5 V | 4 |
| Low-level output voltage (Ta = -40 to 85 °C) | VOL |  |  | 0.44 | V | Ta = -40 to 85 °C; IOL = 8 mA; VCC = 4.5 V | 4 |
| 3-state output OFF-state leakage current (Ta = -40 to 85 °C) | IOZ | -2.5 |  | 2.5 | µA | Ta = -40 to 85 °C; VOUT = VCC or GND | 4 |
| Input leakage current (Ta = -40 to 85 °C) | IIN | -1 |  | 1 | µA | Ta = -40 to 85 °C; VIN = 5.5 V or GND | 4 |
| Quiescent supply current (Ta = -40 to 85 °C) | ICC |  |  | 40 | µA | Ta = -40 to 85 °C; VIN = VCC or GND | 4 |
| Quiescent supply current per input (Ta = -40 to 85 °C) | ICCT |  |  | 1.5 | mA | Ta = -40 to 85 °C; per input VIN = 3.4 V; other input VCC or GND | 4 |
| Output leakage current, power-OFF (Ta = -40 to 85 °C) | IOPD |  |  | 5 | µA | Ta = -40 to 85 °C; VOUT = 5.5 V | 4 |
| High-level input voltage (Ta = -40 to 125 °C) | VIH | 2 |  |  | V | Ta = -40 to 125 °C; VCC = 4.5 to 5.5 V | 4 |
| Low-level input voltage (Ta = -40 to 125 °C) | VIL |  |  | 0.8 | V | Ta = -40 to 125 °C; VCC = 4.5 to 5.5 V | 4 |
| High-level output voltage (Ta = -40 to 125 °C) | VOH | 4.4 |  |  | V | Ta = -40 to 125 °C; IOH = -50 µA; VCC = 4.5 V | 4 |
| High-level output voltage (Ta = -40 to 125 °C) | VOH | 3.7 |  |  | V | Ta = -40 to 125 °C; IOH = -8 mA; VCC = 4.5 V | 4 |
| Low-level output voltage (Ta = -40 to 125 °C) | VOL |  |  | 0.1 | V | Ta = -40 to 125 °C; IOL = 50 µA; VCC = 4.5 V | 4 |
| Low-level output voltage (Ta = -40 to 125 °C) | VOL |  |  | 0.55 | V | Ta = -40 to 125 °C; IOL = 8 mA; VCC = 4.5 V | 4 |
| 3-state output OFF-state leakage current (Ta = -40 to 125 °C) | IOZ | -10 |  | 10 | µA | Ta = -40 to 125 °C; VOUT = VCC or GND | 4 |
| Input leakage current (Ta = -40 to 125 °C) | IIN | -2 |  | 2 | µA | Ta = -40 to 125 °C; VIN = 5.5 V or GND | 4 |
| Quiescent supply current (Ta = -40 to 125 °C) | ICC |  |  | 80 | µA | Ta = -40 to 125 °C; VIN = VCC or GND | 4 |
| Quiescent supply current per input (Ta = -40 to 125 °C) | ICCT |  |  | 1.5 | mA | Ta = -40 to 125 °C; per input VIN = 3.4 V; other input VCC or GND | 4 |
| Output leakage current, power-OFF (Ta = -40 to 125 °C) | IOPD |  |  | 20 | µA | Ta = -40 to 125 °C; VOUT = 5.5 V | 4 |
| Quiet output maximum dynamic VOL | VOLP |  | 0.5 | 0.8 | V | CL = 50 pF; VCC = 5.0 V; Ta = 25 °C, tr = tf = 3 ns | 5 |
| Quiet output minimum dynamic VOL | VOLV | -0.8 | -0.5 |  | V | CL = 50 pF; VCC = 5.0 V; Ta = 25 °C, tr = tf = 3 ns | 5 |
| Propagation delay time (Ta = 25 °C) | tPLH,tPHL |  | 3.8 | 5.5 | ns | RL = 1 kΩ; CL = 15 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| Propagation delay time (Ta = 25 °C) | tPLH,tPHL |  | 5.3 | 7.5 | ns | RL = 1 kΩ; CL = 50 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| 3-state output enable time (Ta = 25 °C) | tPZL,tPZH |  | 3.6 | 5.1 | ns | RL = 1 kΩ; CL = 15 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| 3-state output enable time (Ta = 25 °C) | tPZL,tPZH |  | 5.1 | 7.1 | ns | RL = 1 kΩ; CL = 50 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| 3-state output disable time (Ta = 25 °C) | tPLZ,tPHZ |  | 6.1 | 8.8 | ns | RL = 1 kΩ; CL = 50 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| Propagation delay time (Ta = -40 to 125 °C) | tPLH,tPHL | 1 |  | 7 | ns | RL = 1 kΩ; CL = 15 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| Propagation delay time (Ta = -40 to 125 °C) | tPLH,tPHL | 1 |  | 9.5 | ns | RL = 1 kΩ; CL = 50 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| 3-state output enable time (Ta = -40 to 125 °C) | tPZL,tPZH | 1 |  | 6.5 | ns | RL = 1 kΩ; CL = 15 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| 3-state output enable time (Ta = -40 to 125 °C) | tPZL,tPZH | 1 |  | 9 | ns | RL = 1 kΩ; CL = 50 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |
| 3-state output disable time (Ta = -40 to 125 °C) | tPLZ,tPHZ | 1 |  | 11 | ns | RL = 1 kΩ; CL = 50 pF; VCC = 5.0 ± 0.5 V; tr = tf = 3 ns | 5 |

## CAD (KiCad official)

- Symbol: `74VHCT125AFT`
- Footprint: `Package_SO:TSSOP-14_4.4x5mm_P0.65mm`
- 3D model: TSSOP-14 (KiCad packages3D, STEP)
- 3D model files: `74vhct125aft-etched.step` / `74vhct125aft-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74vhct125aft.step` / `74vhct125aft.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TOSHIBA datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586205185798103040) (7 pp, sha256 `d1ce78bb4e790c7a`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/74vhct125aft-datasheet.pdf)