74HC244PW

@@ -0,0 +1,61 @@+# 74HC244PW++**Nexperia** · Buffer/Driver/Transceiver · TSSOP-20++74HC244PW 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 | Active-LOW output enable for bank 1 (drives 1Y0-1Y3). HIGH forces 1Y0-1Y3 into high-impedance OFF-state. |+| 2 | 1A0 | input | Bank 1 data input 0. CMOS-level input (VIH ~0.7*VCC). |+| 3 | 2Y0 | tri_state | Bank 2 bus output 0, non-inverting buffer of 2A0. High-Z when 2OE is HIGH. Drives up to ±7.8 mA at VCC = 6 V. |+| 4 | 1A1 | input | Bank 1 data input 1. |+| 5 | 2Y1 | tri_state | Bank 2 bus output 1, non-inverting buffer of 2A1. High-Z when 2OE is HIGH. |+| 6 | 1A2 | input | Bank 1 data input 2. |+| 7 | 2Y2 | tri_state | Bank 2 bus output 2, non-inverting buffer of 2A2. High-Z when 2OE is HIGH. |+| 8 | 1A3 | input | Bank 1 data input 3. |+| 9 | 2Y3 | tri_state | Bank 2 bus output 3, non-inverting buffer of 2A3. High-Z when 2OE is HIGH. |+| 10 | GND | power_in | Ground reference (0 V). |+| 11 | 2A3 | input | Bank 2 data input 3. |+| 12 | 1Y3 | tri_state | Bank 1 bus output 3, non-inverting buffer of 1A3. High-Z when 1OE is HIGH. |+| 13 | 2A2 | input | Bank 2 data input 2. |+| 14 | 1Y2 | tri_state | Bank 1 bus output 2, non-inverting buffer of 1A2. High-Z when 1OE is HIGH. |+| 15 | 2A1 | input | Bank 2 data input 1. |+| 16 | 1Y1 | tri_state | Bank 1 bus output 1, non-inverting buffer of 1A1. High-Z when 1OE is HIGH. |+| 17 | 2A0 | input | Bank 2 data input 0. |+| 18 | 1Y0 | tri_state | Bank 1 bus output 0, non-inverting buffer of 1A0. High-Z when 1OE is HIGH. |+| 19 | 2OE | input | Active-LOW output enable for bank 2 (drives 2Y0-2Y3). HIGH forces 2Y0-2Y3 into high-impedance OFF-state. |+| 20 | VCC | power_in | Supply voltage. 2.0-6.0 V for 74HC244 (4.5-5.5 V for 74HCT244). ICC typically 8 uA at VCC = 6 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## Ordering variants++- `74HC244PWPW`+- `74HC244PWD`+- `74HC244PWBQ`++## CAD (KiCad official)++- Symbol: `74HC244PW`+- 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/74HC244PW.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/74hc244pw-datasheet.pdf)

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