74HCT244PW

@@ -0,0 +1,63 @@+# 74HCT244PW++**Nexperia** · Buffer/Driver/Transceiver · TSSOP-20++74HCT244PW 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 | 1OE | input | Output enable input for bank 1 (active LOW). A LOW enables the 1Y0-1Y3 outputs; a HIGH forces them to the high-impedance OFF-state. |+| 2 | 1A0 | input | Data input for bank 1, channel 0. Buffered non-inverting path to 1Y0 when 1OE is LOW. |+| 3 | 2Y0 | tri_state | Bus output for bank 2, channel 0. Non-inverting buffered output of 2A0; high-impedance when 2OE is HIGH. |+| 4 | 1A1 | input | Data input for bank 1, channel 1. Buffered non-inverting path to 1Y1 when 1OE is LOW. |+| 5 | 2Y1 | tri_state | Bus output for bank 2, channel 1. Non-inverting buffered output of 2A1; high-impedance when 2OE is HIGH. |+| 6 | 1A2 | input | Data input for bank 1, channel 2. Buffered non-inverting path to 1Y2 when 1OE is LOW. |+| 7 | 2Y2 | tri_state | Bus output for bank 2, channel 2. Non-inverting buffered output of 2A2; high-impedance when 2OE is HIGH. |+| 8 | 1A3 | input | Data input for bank 1, channel 3. Buffered non-inverting path to 1Y3 when 1OE is LOW. |+| 9 | 2Y3 | tri_state | Bus output for bank 2, channel 3. Non-inverting buffered output of 2A3; high-impedance when 2OE is HIGH. |+| 10 | GND | power_in | Ground reference (0 V). |+| 11 | 2A3 | input | Data input for bank 2, channel 3. Buffered non-inverting path to 2Y3 when 2OE is LOW. |+| 12 | 1Y3 | tri_state | Bus output for bank 1, channel 3. Non-inverting buffered output of 1A3; high-impedance when 1OE is HIGH. |+| 13 | 2A2 | input | Data input for bank 2, channel 2. Buffered non-inverting path to 2Y2 when 2OE is LOW. |+| 14 | 1Y2 | tri_state | Bus output for bank 1, channel 2. Non-inverting buffered output of 1A2; high-impedance when 1OE is HIGH. |+| 15 | 2A1 | input | Data input for bank 2, channel 1. Buffered non-inverting path to 2Y1 when 2OE is LOW. |+| 16 | 1Y1 | tri_state | Bus output for bank 1, channel 1. Non-inverting buffered output of 1A1; high-impedance when 1OE is HIGH. |+| 17 | 2A0 | input | Data input for bank 2, channel 0. Buffered non-inverting path to 2Y0 when 2OE is LOW. |+| 18 | 1Y0 | tri_state | Bus output for bank 1, channel 0. Non-inverting buffered output of 1A0; high-impedance when 1OE is HIGH. |+| 19 | 2OE | input | Output enable input for bank 2 (active LOW). A LOW enables the 2Y0-2Y3 outputs; a HIGH forces them to the high-impedance OFF-state. |+| 20 | VCC | power_in | Positive supply voltage. 74HCT244: 4.5 V to 5.5 V recommended (absolute max 7 V). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## Ordering variants++Same part, different packaging or reel option.++- `74HCT244PW`+- `74HCT244PWD`+- `74HCT244PWBQ`++## CAD (KiCad official)++- Symbol: `74HCT244PW`+- 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/74HCT244PW.pdf) (15 pp, sha256 `7d5786046ad334eb`, 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/74hct244pw-datasheet.pdf)

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