component
74HCT245PW
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Nexperia Buffer/Driver/Transceiver, TSSOP-20. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+61@@ -0,0 +1,61 @@+# 74HCT245PW++**Nexperia** · Buffer/Driver/Transceiver · TSSOP-20++74HCT245PW from Nexperia, in a TSSOP-20. 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 | DIR | input | Direction control input. LOW = data flows B→A (B ports are inputs, A ports are outputs); HIGH = data flows A→B (A ports are inputs, B ports are outputs). TTL-level input. |+| 2 | A0 | bidirectional | Bidirectional data I/O bit 0 on the A-side bus. Acts as input or 3-state output depending on DIR and OE. |+| 3 | A1 | bidirectional | Bidirectional data I/O bit 1 on the A-side bus. |+| 4 | A2 | bidirectional | Bidirectional data I/O bit 2 on the A-side bus. |+| 5 | A3 | bidirectional | Bidirectional data I/O bit 3 on the A-side bus. |+| 6 | A4 | bidirectional | Bidirectional data I/O bit 4 on the A-side bus. |+| 7 | A5 | bidirectional | Bidirectional data I/O bit 5 on the A-side bus. |+| 8 | A6 | bidirectional | Bidirectional data I/O bit 6 on the A-side bus. |+| 9 | A7 | bidirectional | Bidirectional data I/O bit 7 on the A-side bus. |+| 10 | GND | power_in | Ground reference (0 V). Connect to system ground. |+| 11 | B7 | bidirectional | Bidirectional data I/O bit 7 on the B-side bus. |+| 12 | B6 | bidirectional | Bidirectional data I/O bit 6 on the B-side bus. |+| 13 | B5 | bidirectional | Bidirectional data I/O bit 5 on the B-side bus. |+| 14 | B4 | bidirectional | Bidirectional data I/O bit 4 on the B-side bus. |+| 15 | B3 | bidirectional | Bidirectional data I/O bit 3 on the B-side bus. |+| 16 | B2 | bidirectional | Bidirectional data I/O bit 2 on the B-side bus. |+| 17 | B1 | bidirectional | Bidirectional data I/O bit 1 on the B-side bus. |+| 18 | B0 | bidirectional | Bidirectional data I/O bit 0 on the B-side bus. |+| 19 | OE | input | Output enable, active LOW. LOW enables the transceiver in the direction set by DIR; HIGH places both A and B ports in high-impedance (3-state) OFF condition. |+| 20 | VCC | power_in | Positive supply voltage. Recommended operating range 4.5 V to 5.5 V for 74HCT245 (TTL-input variant); absolute max 7 V. Decouple with a 100 nF ceramic capacitor to GND close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## Ordering variants++- `74HCT245PWPW`+- `74HCT245PWD`+- `74HCT245PWBQ`++## CAD (KiCad official)++- Symbol: `74HCT245PW`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/74HCT245PW.pdf) (15 pp, sha256 `ff2562c806a0fc87`, 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/74hct245pw-datasheet.pdf)
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