# TLC1549IDR

**Texas Instruments** · Analog To Digital Converters (ADC) · SOIC-8

TLC1549IDR from Texas Instruments, in a SOIC-8. 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 | REF+ | input | The upper reference voltage value (nominally VCC) is applied to REF+. |
| 2 | ANALOG IN | input | Analog signal input with driving source impedance ≤ 1 kΩ and driving source current capability ≥ 10 mA. |
| 3 | REF- | input | The lower reference voltage value (nominally ground) is applied to REF-. |
| 4 | GND | power_in | The ground return for internal circuitry. |
| 5 | CS | input | Chip select; a high-to-low transition resets the internal counters and enables DATA OUT and I/O CLOCK. |
| 6 | DATA OUT | tri_state | 3-state serial output for the A/D conversion result; high-impedance state when CS is high and active when CS is low. |
| 7 | I/O CLOCK | input | Serial I/O clock input; on the third falling edge analog input sampling begins and continues until the tenth falling edge. |
| 8 | VCC | power_in | Positive supply voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Data Acquisition |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `TLC1549IDR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `tlc1549idr-etched.step` / `tlc1549idr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tlc1549idr.step` / `tlc1549idr.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/tlc1549.pdf) (20 pp, sha256 `134c25af77335e0b`, retrieved 2026-10-05, 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/tlc1549idr-datasheet.pdf)