# CD74HC137PWR

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

CD74HC137PWR 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 A0, the least significant bit of the 3-bit decoder address |
| 2 | A1 | input | Address select input A1, the middle bit of the 3-bit decoder address |
| 3 | A2 | input | Address select input A2, the most significant bit of the 3-bit decoder address |
| 4 | LE | input | Latch Enable input, active high; when high, latches the A0-A2 address inputs |
| 5 | OE1 | input | Output Enable input 1; selected output is active when OE0=H and OE1=L |
| 6 | OE0 | input | Output Enable input 0; selected output is active when OE0=H and OE1=L |
| 7 | Y7 | output | Decoder output 7, active low when selected and enabled |
| 8 | GND | power_in | Ground, 0V reference |
| 9 | Y6 | output | Decoder output 6, active low when selected and enabled |
| 10 | Y5 | output | Decoder output 5, active low when selected and enabled |
| 11 | Y4 | output | Decoder output 4, active low when selected and enabled |
| 12 | Y3 | output | Decoder output 3, active low when selected and enabled |
| 13 | Y2 | output | Decoder output 2, active low when selected and enabled |
| 14 | Y1 | output | Decoder output 1, active low when selected and enabled |
| 15 | Y0 | output | Decoder output 0, active low when selected and enabled |
| 16 | VCC | power_in | Positive supply voltage; 2V to 6V for HC types |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `CD74HC137PWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `cd74hc137pwr-etched.step` / `cd74hc137pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74hc137pwr.step` / `cd74hc137pwr.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/cd74hc137.pdf) (27 pp, sha256 `392e1dad7454b4a5`, retrieved 2026-09-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/cd74hc137pwr-datasheet.pdf)