# SN74ALVCH245PWR

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

SN74ALVCH245PWR from Texas Instruments, 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 | DIR | input | Direction control input; low selects B→A, high selects A→B data transmission. |
| 2 | A1 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 3 | A2 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 4 | A3 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 5 | A4 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 6 | A5 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 7 | A6 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 8 | A7 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 9 | A8 | tri_state | A-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 10 | GND | power_in | Ground, supply return path. |
| 11 | B8 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 12 | B7 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 13 | B6 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 14 | B5 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 15 | B4 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 16 | B3 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 17 | B2 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 18 | B1 | tri_state | B-bus data I/O pin with 3-state output and bus-hold circuitry on input. |
| 19 | OE | input | Output enable control input (active low); places outputs in high impedance when high, isolating the buses. |
| 20 | VCC | power_in | Positive supply voltage input; operating range 1.65 V to 3.6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74ALVCH245PWR`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `sn74alvch245pwr-etched.step` / `sn74alvch245pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74alvch245pwr.step` / `sn74alvch245pwr.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/lit/ds/symlink/sn74alvch245.pdf) (18 pp, sha256 `1ad72c67e1aa5cde`, retrieved 2026-10-07, tier: manufacturer)
- **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/sn74alvch245pwr-datasheet.pdf)