# SN74AHC541DBR

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SSOP-20-208mil

SN74AHC541DBR from Texas Instruments, in a SSOP-20-208mil. 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 1 control input for tri-state buffers; input voltage 0 to 5.5V |
| 2 | A1 | input | A1 data input for buffering and driving to corresponding output Y1; input voltage 0 to 5.5V |
| 3 | A2 | input | A2 data input for buffering and driving to corresponding output Y2; input voltage 0 to 5.5V |
| 4 | A3 | input | A3 data input for buffering and driving to corresponding output Y3; input voltage 0 to 5.5V |
| 5 | A4 | input | A4 data input for buffering and driving to corresponding output Y4; input voltage 0 to 5.5V |
| 6 | A5 | input | A5 data input for buffering and driving to corresponding output Y5; input voltage 0 to 5.5V |
| 7 | A6 | input | A6 data input for buffering and driving to corresponding output Y6; input voltage 0 to 5.5V |
| 8 | A7 | input | A7 data input for buffering and driving to corresponding output Y7; input voltage 0 to 5.5V |
| 9 | A8 | input | A8 data input for buffering and driving to corresponding output Y8; input voltage 0 to 5.5V |
| 10 | GND | power_in | Ground reference pin and return path for internal circuits, 0V reference |
| 11 | Y8 | tri_state | Y8 tri-state buffered output driven from A8 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 12 | Y7 | tri_state | Y7 tri-state buffered output driven from A7 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 13 | Y6 | tri_state | Y6 tri-state buffered output driven from A6 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 14 | Y5 | tri_state | Y5 tri-state buffered output driven from A5 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 15 | Y4 | tri_state | Y4 tri-state buffered output driven from A4 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 16 | Y3 | tri_state | Y3 tri-state buffered output driven from A3 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 17 | Y2 | tri_state | Y2 tri-state buffered output driven from A2 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 18 | Y1 | tri_state | Y1 tri-state buffered output driven from A1 input when enabled; output voltage 0 to VCC, ±25mA continuous |
| 19 | OE2 | input | Output Enable 2 control input for tri-state buffers; input voltage 0 to 5.5V |
| 20 | VCC | power_in | Positive power supply voltage input, operating range 2V to 5.5V |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-20-208mil |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74AHC541DBR`
- Footprint: `Package_SO:SSOP-20_5.3x7.2mm_P0.65mm`
- 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files: `sn74ahc541dbr-etched.step` / `sn74ahc541dbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ahc541dbr.step` / `sn74ahc541dbr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/sn74ahc541) (42 pp, sha256 `2bf701d65dda347a`, retrieved 2026-10-01, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/sn74ahc541dbr-datasheet.pdf)