component
MC74ACT125DR2G
Public Made by Adomby adom
onsemi Buffer/Driver/Transceiver, SOIC-14. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMC74ACT125DR2G
onsemi · Buffer/Driver/Transceiver · SOIC-14
MC74ACT125DR2G from onsemi, in a SOIC-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 | ~A0 | input | Active-low output enable for buffer 0. When low the buffer drives O0 with B0; when high O0 is placed in the high-impedance (3-state) state. TTL-compatible input threshold (VIH >= 2.0 V, VIL <= 0.8 V) with input leakage +/-1 uA max. |
| 2 | B0 | input | Data input for buffer 0. Drives O0 when the corresponding output enable ~A0 is low; ignored (X) when ~A0 is high (output high-Z). TTL-compatible input threshold on the 'ACT variant. |
| 3 | O0 | tri_state | 3-state buffered output for channel 0. Follows B0 when ~A0 is low; high-Z when ~A0 is high. Drive capability +/-24 mA at VCC = 4.5 V (IOH/IOL guaranteed limits). |
| 4 | ~A1 | input | Active-low output enable for buffer 1. Low = enable (O1 = B1); high = high-Z output. |
| 5 | B1 | input | Data input for buffer 1. Passed to O1 when ~A1 is low. |
| 6 | O1 | tri_state | 3-state buffered output for channel 1. Drives +/-24 mA; high-Z when ~A1 is high. |
| 7 | GND | power_in | Ground reference (0 V) for the device. All input/output voltages are referenced to this pin. |
| 8 | O3 | tri_state | 3-state buffered output for channel 3. Follows B3 when ~A3 is low; high-Z when ~A3 is high. |
| 9 | B3 | input | Data input for buffer 3. Passed to O3 when ~A3 is low. |
| 10 | ~A3 | input | Active-low output enable for buffer 3. Low = enable (O3 = B3); high = high-Z output. |
| 11 | O2 | tri_state | 3-state buffered output for channel 2. Follows B2 when ~A2 is low; high-Z when ~A2 is high. |
| 12 | B2 | input | Data input for buffer 2. Passed to O2 when ~A2 is low. |
| 13 | ~A2 | input | Active-low output enable for buffer 2. Low = enable (O2 = B2); high = high-Z output. |
| 14 | VCC | power_in | Positive supply. Recommended 4.5-5.5 V for the 'ACT variant (absolute max 7.0 V). Bypass with a 0.1 uF ceramic near the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOIC-14 |
| Category | Logic |
| Pins | 14 |
Ordering variants
Same part, different packaging or reel option.
MC74ACT125DR2GMC74ACT125DR2GDGMC74ACT125DR2GDTR2G
CAD (KiCad official)
- Symbol:
MC74ACT125DR2G - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files:
mc74act125dr2g-etched.step/mc74act125dr2g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mc74act125dr2g.step/mc74act125dr2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (8 pp, sha256
a8b1cd5809fcaf46, retrieved 2026-08-17, tier: manufacturer) - 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).