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U74AHC125G-S14-R
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UTC Unisonic Tech Buffers, Drivers, Receivers, Transceivers, SOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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Datasheet
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README
markdownU74AHC125G-S14-R
UTC Unisonic Tech · Buffers, Drivers, Receivers, Transceivers · SOP-14
U74AHC125G-S14-R 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 | 1OE | input | Active-low output enable for buffer 1; high puts 1Y in high-impedance state, low passes 1A to 1Y. |
| 2 | 1A | input | Data input of buffer 1, passed non-inverted to 1Y when 1OE is low. |
| 3 | 1Y | tri_state | 3-state output of buffer 1, high-impedance when 1OE is high. |
| 4 | 2OE | input | Active-low output enable for buffer 2; high puts 2Y in high-impedance state, low passes 2A to 2Y. |
| 5 | 2A | input | Data input of buffer 2, passed non-inverted to 2Y when 2OE is low. |
| 6 | 2Y | tri_state | 3-state output of buffer 2, high-impedance when 2OE is high. |
| 7 | GND | power_in | Ground pin. |
| 8 | 3Y | tri_state | 3-state output of buffer 3, high-impedance when 3OE is high. |
| 9 | 3A | input | Data input of buffer 3, passed non-inverted to 3Y when 3OE is low. |
| 10 | 3OE | input | Active-low output enable for buffer 3; high puts 3Y in high-impedance state, low passes 3A to 3Y. |
| 11 | 4Y | tri_state | 3-state output of buffer 4, high-impedance when 4OE is high. |
| 12 | 4A | input | Data input of buffer 4, passed non-inverted to 4Y when 4OE is low. |
| 13 | 4OE | input | Active-low output enable for buffer 4; high puts 4Y in high-impedance state, low passes 4A to 4Y. |
| 14 | VCC | power_in | Supply voltage pin, recommended operating range 2V to 5.5V (absolute max 7V). |
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 | 2 | 5.5 | V | 3 | ||
| Input Voltage | VIN | 0 | 5.5 | V | 3 | ||
| Output Voltage | VOUT | 0 | V | 3 | |||
| High-level Output Current | IOH | -50 | μA | VCC=2V | 3 | ||
| High-level Output Current | IOH | -4 | mA | VCC=3.3±0.3V | 3 | ||
| High-level Output Current | IOH | -8 | mA | VCC=5±0.5V | 3 | ||
| Low-level Output Current | IOL | 50 | μA | VCC=2V | 3 | ||
| Low-level Output Current | IOL | 4 | mA | VCC=3.3±0.3V | 3 | ||
| Low-level Output Current | IOL | 8 | mA | VCC=5±0.5V | 3 | ||
| Input Transition Rise or Fall Rate | t/v | 100 | ns/V | VCC=3.3±0.3V | 3 | ||
| Input Transition Rise or Fall Rate | t/v | 20 | ns/V | VCC=5±0.5V | 3 | ||
| Operating Temperature | TA | -40 | 125 | °C | 3 | ||
| Supply Voltage | VCC | -0.5 | 7 | V | 3 | ||
| Input Voltage | VIN | -0.5 | 7 | V | 3 | ||
| Output Voltage | VOUT | -0.5 | V | 3 | |||
| Input Clamp Current | IIK | -20 | mA | VIN<0 | 3 | ||
| Output Clamp Current | IOK | -20 | 20 | mA | VOUT<0, or VOUT>VCC | 3 | |
| Output Current | IOUT | -25 | 25 | mA | 3 | ||
| VCC or GND Current | ICC | -50 | 50 | mA | 3 | ||
| Storage Temperature | TSTG | -65 | 150 | °C | 3 | ||
| High-Level Input Voltage | VIH | 1.5 | V | VCC=2V, TA=25°C | 4 | ||
| High-Level Input Voltage | VIH | 2.1 | V | VCC=3V, TA=25°C | 4 | ||
| High-Level Input Voltage | VIH | 3.85 | V | VCC=5.5V, TA=25°C | 4 | ||
| Low-Level Input Voltage | VIL | 0.5 | V | VCC=2V, TA=25°C | 4 | ||
| Low-Level Input Voltage | VIL | 0.9 | V | VCC=3V, TA=25°C | 4 | ||
| Low-Level Input Voltage | VIL | 1.65 | V | VCC=5.5V, TA=25°C | 4 | ||
| High-Level Output Voltage | VOH | 1.9 | 2 | V | IOH=-50μA, VCC=2V, TA=25°C | 4 | |
| High-Level Output Voltage | VOH | 1.9 | V | IOH=-50μA, VCC=2V, TA=-40~+125°C | 4 | ||
| High-Level Output Voltage | VOH | 2.9 | 3 | V | IOH=-50μA, VCC=3V, TA=25°C | 4 | |
| High-Level Output Voltage | VOH | 2.9 | V | IOH=-50μA, VCC=3V, TA=-40~+125°C | 4 | ||
| High-Level Output Voltage | VOH | 4.4 | 4.5 | V | IOH=-50μA, VCC=4.5V, TA=25°C | 4 | |
| High-Level Output Voltage | VOH | 4.4 | V | IOH=-50μA, VCC=4.5V, TA=-40~+125°C | 4 | ||
| High-Level Output Voltage | VOH | 2.58 | V | IOH=-4mA, VCC=3V, TA=25°C | 4 | ||
| High-Level Output Voltage | VOH | 2.4 | V | IOH=-4mA, VCC=3V, TA=-40~+125°C | 4 | ||
| High-Level Output Voltage | VOH | 3.94 | V | IOH=-8mA, VCC=4.5V, TA=25°C | 4 | ||
| High-Level Output Voltage | VOH | 3.7 | V | IOH=-8mA, VCC=4.5V, TA=-40~+125°C | 4 | ||
| Low-Level Output Voltage | VOL | 0.1 | V | IOL=50μA, VCC=2V, TA=25°C | 4 | ||
| Low-Level Output Voltage | VOL | 0.36 | V | IOL=4mA, VCC=3V, TA=25°C | 4 | ||
| Low-Level Output Voltage | VOL | 0.55 | V | IOL=4mA, VCC=3V, TA=-40~+125°C | 4 | ||
| Input Leakage Current (A or OE Input) | II(LEAK) | -0.1 | 0.1 | μA | VIN=5.5V or GND, VCC=0~5.5V, TA=25°C | 4 | |
| Input Leakage Current (A or OE Input) | II(LEAK) | -2 | 2 | μA | VIN=5.5V or GND, VCC=0 |
4 | |
| High-impedance State Current | IOZ | -0.25 | 0.25 | μA | VOUT=VCC or GND, VCC=5.5V, TA=25°C | 4 | |
| High-impedance State Current | IOZ | -10 | 10 | μA | VOUT=VCC or GND, VCC=5.5V, TA=-40~+125°C | 4 | |
| Quiescent Supply Current | ICC | 4 | μA | VIN=VCC or GND, IOUT=0, VCC=5.5V, TA=25°C | 4 | ||
| Quiescent Supply Current | ICC | 40 | μA | VIN=VCC or GND, IOUT=0, VCC=5.5V, TA=-40~+125°C | 4 | ||
| Input Capacitance | CIN | 4 | 10 | pF | VIN=VCC or GND, VCC=5V | 5 |
CAD (KiCad official)
- Symbol:
U74AHC125G-S14-R - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files:
u74ahc125g-s14-r-etched.step/u74ahc125g-s14-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);u74ahc125g-s14-r.step/u74ahc125g-s14-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (7 pp, sha256
b00f595425e62b0a, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).