# TRS3227EIDB

**Texas Instruments** · RS232 ICs · SSOP-16-208mil

TRS3227EIDB from Texas Instruments, in a SSOP-16-208mil. 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 | READY | output | Ready to transmit output, active high, enabled when V- goes below -3.5 V and the device is ready to transmit. |
| 2 | C1+ | passive | Positive terminal of voltage-doubler charge-pump capacitor. |
| 3 | V+ | power_out | Positive supply output voltage +2 × VCC generated by the charge pump. |
| 4 | C1− | passive | Negative terminal of voltage-doubler charge-pump capacitor. |
| 5 | C2+ | passive | Positive terminal of inverting charge-pump capacitor. |
| 6 | C2− | passive | Negative terminal of inverting charge-pump capacitor. |
| 7 | V− | power_out | Negative supply output voltage −2 × VCC generated by the charge pump. |
| 8 | RIN | input | RS-232 receiver input. |
| 9 | ROUT | output | CMOS receiver output. |
| 10 | INVALID | output | Valid signal detector output, active low; a logic high indicates that a valid RS-232 level is present on a receiver input. |
| 11 | DIN | input | CMOS driver input. |
| 12 | FORCEON | input | Force-on input, active high; drive high to override powerdown, keeping drivers and receivers on when FORCEOFF is high. |
| 13 | DOUT | output | RS-232 driver output. |
| 14 | GND | power_in | Ground. |
| 15 | VCC | power_in | 3 V to 5.5 V single-supply voltage input. |
| 16 | FORCEOFF | input | Force-off input, active low; drive low to shut down drivers, receivers, and charge pump, overriding auto-shutdown and FORCEON. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-16-208mil |
| Category | Interface |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `TRS3227EIDB`
- Footprint: `Package_SO:SSOP-16_5.3x6.2mm_P0.65mm`
- 3D model: SSOP-16-208mil (KiCad packages3D, STEP)
- 3D model files: `trs3227eidb-etched.step` / `trs3227eidb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `trs3227eidb.step` / `trs3227eidb.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/trs3227e) (18 pp, sha256 `7db13a083d90c1a4`, retrieved 2026-10-01, tier: lcsc)
- **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/trs3227eidb-datasheet.pdf)