# MC74LCX541DTG

**onsemi** · Buffers / Drivers · TSSOP-20

MC74LCX541DTG from onsemi, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OE1 | input | Output Enable input 1; when HIGH, places the outputs in a high-impedance state (outputs enabled only when OE1 and OE2 are both LOW). |
| 2 | D0 | input | Data input 0, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 3 | D1 | input | Data input 1, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 4 | D2 | input | Data input 2, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 5 | D3 | input | Data input 3, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 6 | D4 | input | Data input 4, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 7 | D5 | input | Data input 5, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 8 | D6 | input | Data input 6, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 9 | D7 | input | Data input 7, 5.5 V tolerant (VI max 5.5 V) and TTL compatible. |
| 10 | GND | power_in | Ground pin (0 V); ground current limit is ±100 mA per ground pin. |
| 11 | O7 | tri_state | 3-state non-inverting output 7 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 12 | O6 | tri_state | 3-state non-inverting output 6 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 13 | O5 | tri_state | 3-state non-inverting output 5 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 14 | O4 | tri_state | 3-state non-inverting output 4 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 15 | O3 | tri_state | 3-state non-inverting output 3 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 16 | O2 | tri_state | 3-state non-inverting output 2 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 17 | O1 | tri_state | 3-state non-inverting output 1 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 18 | O0 | tri_state | 3-state non-inverting output 0 with 24 mA drive, 5.5 V tolerant in 3-state. |
| 19 | OE2 | input | Output Enable input 2; when HIGH, places the outputs in a high-impedance state (outputs enabled only when OE1 and OE2 are both LOW). |
| 20 | VCC | power_in | Positive supply pin; operating range 2.0 to 3.6 V (designed for 2.3 to 3.6 V), absolute max -0.5 to +7.0 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSSOP-20 |
| Category | Logic ICs |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `MC74LCX541DTG`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `mc74lcx541dtg-etched.step` / `mc74lcx541dtg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mc74lcx541dtg.step` / `mc74lcx541dtg.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mc74lcx541dt-d.pdf) (9 pp, sha256 `93c0e34911482cdc`, retrieved 2026-10-24, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/mc74lcx541dtg-datasheet.pdf)