74hct541pw

@@ -0,0 +1,60 @@+# 74HCT541PW++**Nexperia** · Buffer/Driver/Transceiver · TSSOP-20++74HCT541PW 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 | OE1 | input | Output enable input 1 (active LOW). When OE1 is LOW AND OE2 is LOW, the eight Y outputs follow the A inputs; when OE1 is HIGH the outputs are forced to a high-impedance (Z) OFF-state. |+| 2 | A0 | input | Data input, channel 0. TTL-compatible logic input (74HCT), typical VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5 V to 5.5 V. Drives buffer output Y0 when both output enables are asserted (LOW). |+| 3 | A1 | input | Data input, channel 1. TTL-compatible logic input driving buffer output Y1 when both OE1 and OE2 are LOW. |+| 4 | A2 | input | Data input, channel 2. TTL-compatible logic input driving buffer output Y2 when both OE1 and OE2 are LOW. |+| 5 | A3 | input | Data input, channel 3. TTL-compatible logic input driving buffer output Y3 when both OE1 and OE2 are LOW. |+| 6 | A4 | input | Data input, channel 4. TTL-compatible logic input driving buffer output Y4 when both OE1 and OE2 are LOW. |+| 7 | A5 | input | Data input, channel 5. TTL-compatible logic input driving buffer output Y5 when both OE1 and OE2 are LOW. |+| 8 | A6 | input | Data input, channel 6. TTL-compatible logic input driving buffer output Y6 when both OE1 and OE2 are LOW. |+| 9 | A7 | input | Data input, channel 7. TTL-compatible logic input driving buffer output Y7 when both OE1 and OE2 are LOW. |+| 10 | GND | power_in | Ground reference (0 V). All voltages in the datasheet are referenced to this pin. Absolute maximum IGND is -70 mA. |+| 11 | Y7 | tri_state | 3-state buffered data output, channel 7. Drives HIGH/LOW to follow A7 when OE1 = OE2 = LOW; enters high-impedance OFF-state when either OE is HIGH. Rated IO up to ±6.0 mA at VCC = 4.5 V (VOH ≥ 3.98 V, VOL ≤ 0.26 V typ). |+| 12 | Y6 | tri_state | 3-state buffered data output, channel 6. Follows A6 when both output enables are LOW; high-impedance when either OE is HIGH. |+| 13 | Y5 | tri_state | 3-state buffered data output, channel 5. Follows A5 when both output enables are LOW; high-impedance when either OE is HIGH. |+| 14 | Y4 | tri_state | 3-state buffered data output, channel 4. Follows A4 when both output enables are LOW; high-impedance when either OE is HIGH. |+| 15 | Y3 | tri_state | 3-state buffered data output, channel 3. Follows A3 when both output enables are LOW; high-impedance when either OE is HIGH. |+| 16 | Y2 | tri_state | 3-state buffered data output, channel 2. Follows A2 when both output enables are LOW; high-impedance when either OE is HIGH. |+| 17 | Y1 | tri_state | 3-state buffered data output, channel 1. Follows A1 when both output enables are LOW; high-impedance when either OE is HIGH. |+| 18 | Y0 | tri_state | 3-state buffered data output, channel 0. Follows A0 when both output enables are LOW; high-impedance when either OE is HIGH. |+| 19 | OE2 | input | Output enable input 2 (active LOW). Both OE1 and OE2 must be LOW to enable the Y outputs; a HIGH on either OE forces all outputs to a high-impedance state. |+| 20 | VCC | power_in | Supply voltage. Recommended operating range 4.5 V to 5.5 V for 74HCT541 (TTL-compatible variant); absolute maximum -0.5 V to +7 V. Bypass to GND with a local ceramic capacitor near the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Nexperia |+| Package | TSSOP-20 |+| Category | Logic |+| Pins | 20 |++## Ordering variants++- `74HCT541PW`+- `74HCT541PWD`++## CAD (KiCad official)++- Symbol: `74HCT541PW`+- 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/74HCT541PW.pdf) (None pp, sha256 `1365fecc10aa88a3`, 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/74hct541pw-datasheet.pdf)

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