74HC125D

@@ -0,0 +1,54 @@+# 74HC125D++**Nexperia** · Buffer/Driver/Transceiver · SOIC-14++74HC125D from Nexperia, 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 | 1OE | input | Output enable input for buffer 1 (active LOW). A LOW enables buffer 1 to pass 1A to 1Y; a HIGH places 1Y into high-impedance state. |+| 2 | 1A | input | Data input for buffer 1. CMOS-level input (74HC125) or TTL-level input (74HCT125); VI range 0 V to VCC. |+| 3 | 1Y | tri_state | Data output for buffer 1. 3-state output; drives typically ±6 mA at VCC = 4.5 V. High-Z when 1OE is HIGH. |+| 4 | 2OE | input | Output enable input for buffer 2 (active LOW). A LOW enables 2A to 2Y; a HIGH places 2Y into high-impedance state. |+| 5 | 2A | input | Data input for buffer 2. CMOS/TTL logic input; VI range 0 V to VCC. |+| 6 | 2Y | tri_state | Data output for buffer 2. 3-state output controlled by 2OE. |+| 7 | GND | power_in | Ground reference (0 V). |+| 8 | 3Y | tri_state | Data output for buffer 3. 3-state output controlled by 3OE. |+| 9 | 3A | input | Data input for buffer 3. CMOS/TTL logic input; VI range 0 V to VCC. |+| 10 | 3OE | input | Output enable input for buffer 3 (active LOW). A LOW enables 3A to 3Y; a HIGH places 3Y into high-impedance state. |+| 11 | 4Y | tri_state | Data output for buffer 4. 3-state output controlled by 4OE. |+| 12 | 4A | input | Data input for buffer 4. CMOS/TTL logic input; VI range 0 V to VCC. |+| 13 | 4OE | input | Output enable input for buffer 4 (active LOW). A LOW enables 4A to 4Y; a HIGH places 4Y into high-impedance state. |+| 14 | VCC | power_in | Positive supply voltage. 74HC125: 2.0 V to 6.0 V. 74HCT125: 4.5 V to 5.5 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | SOIC-14 |+| Category | Logic |+| Pins | 14 |++## Ordering variants++- `74HC125DD`+- `74HC125DPW`++## CAD (KiCad official)++- Symbol: `74HC125D`+- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`+- 3D model: SOIC-14 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/74HC125D.pdf) (13 pp, sha256 `3b5da3a3dcae2624`, 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).++[Datasheet PDF](docs/74hc125d-datasheet.pdf)

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