# SN74ALS573CDBR

**Texas Instruments** · Latches · SSOP-20-208mil

SN74ALS573CDBR 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 | OE | input | Active-low output enable; high places the eight 3-state outputs in the high-impedance state without affecting latch contents. |
| 2 | 1D | input | Data input for latch 1. |
| 3 | 2D | input | Data input for latch 2. |
| 4 | 3D | input | Data input for latch 3. |
| 5 | 4D | input | Data input for latch 4. |
| 6 | 5D | input | Data input for latch 5. |
| 7 | 6D | input | Data input for latch 6. |
| 8 | 7D | input | Data input for latch 7. |
| 9 | 8D | input | Data input for latch 8. |
| 10 | GND | power_in | Ground. |
| 11 | LE | input | Latch enable; outputs follow D inputs while high and latch the data when low. |
| 12 | 8Q | tri_state | 3-state output of latch 8. |
| 13 | 7Q | tri_state | 3-state output of latch 7. |
| 14 | 6Q | tri_state | 3-state output of latch 6. |
| 15 | 5Q | tri_state | 3-state output of latch 5. |
| 16 | 4Q | tri_state | 3-state output of latch 4. |
| 17 | 3Q | tri_state | 3-state output of latch 3. |
| 18 | 2Q | tri_state | 3-state output of latch 2. |
| 19 | 1Q | tri_state | 3-state output of latch 1. |
| 20 | VCC | power_in | Supply voltage, 4.5 V to 5.5 V recommended (7 V absolute maximum). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SN74ALS573CDBR`
- Footprint: `Package_SO:SSOP-20_5.3x7.2mm_P0.65mm`
- 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files: `sn74als573cdbr-etched.step` / `sn74als573cdbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74als573cdbr.step` / `sn74als573cdbr.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/sn74als573c) (24 pp, sha256 `54ce4b4f857c15f9`, retrieved 2026-10-12, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/sn74als573cdbr-datasheet.pdf)