# CD74HC238PWR

**Texas Instruments** · Signal Switches, Multiplexers, Decoders · TSSOP-16

CD74HC238PWR from Texas Instruments, in a TSSOP-16. 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 | A0 | input | Address select input 0 for the 3-to-8 decoder |
| 2 | A1 | input | Address select input 1 for the 3-to-8 decoder |
| 3 | A2 | input | Address select input 2 for the 3-to-8 decoder |
| 4 | G0 | input | Output strobe 0, active low; all outputs driven low when G0 is high |
| 5 | G1 | input | Output strobe 1, active low; all outputs driven low when G1 is high |
| 6 | G2 | input | Output strobe 2; all outputs driven low when G2 is low |
| 7 | Y7 | output | Decoder output; high when address A2:A0 = 111 (binary) and strobes enable, otherwise low |
| 8 | GND | power_in | Ground connection |
| 9 | Y6 | output | Decoder output; high when address A2:A0 = 110 (binary) and strobes enable, otherwise low |
| 10 | Y5 | output | Decoder output; high when address A2:A0 = 101 (binary) and strobes enable, otherwise low |
| 11 | Y4 | output | Decoder output; high when address A2:A0 = 100 (binary) and strobes enable, otherwise low |
| 12 | Y3 | output | Decoder output; high when address A2:A0 = 011 (binary) and strobes enable, otherwise low |
| 13 | Y2 | output | Decoder output; high when address A2:A0 = 010 (binary) and strobes enable, otherwise low |
| 14 | Y1 | output | Decoder output; high when address A2:A0 = 001 (binary) and strobes enable, otherwise low |
| 15 | Y0 | output | Decoder output; high when address A2:A0 = 000 (binary) and strobes enable, otherwise low |
| 16 | VCC | power_in | Positive power supply voltage, 2 V to 6 V for HC type per recommended operating conditions |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Logic |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `CD74HC238PWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `cd74hc238pwr-etched.step` / `cd74hc238pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74hc238pwr.step` / `cd74hc238pwr.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/cd74hc238.pdf) (29 pp, sha256 `8fc4539fc7ae62f7`, retrieved 2026-09-24, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-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/cd74hc238pwr-datasheet.pdf)