# MAX3232IDWR

**Texas Instruments** · RS232 ICs · SOIC-16-300mil

MAX3232IDWR from Texas Instruments, in a SOIC-16-300mil. 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 | C1+ | passive | Positive lead of the C1 charge-pump capacitor; C1 is 0.1 µF for VCC = 3.3 V ±0.3 V or 3 V to 5.5 V, and 0.047 µF for VCC = 5 V ±0.5 V. |
| 2 | V+ | power_out | Positive charge-pump output, used only for the storage capacitor; it is a generated supply, not an input. |
| 3 | C1- | passive | Negative lead of the C1 charge-pump capacitor. |
| 4 | C2+ | passive | Positive lead of the C2 charge-pump capacitor; C2 is 0.1 µF for 3.3 V or 0.33 µF for 5 V, and 0.47 µF for 3 V to 5.5 V operation. |
| 5 | C2- | passive | Negative lead of the C2 charge-pump capacitor. |
| 6 | V- | power_out | Negative charge-pump output, used only for the storage capacitor; it is a generated supply, not an input. |
| 7 | DOUT2 | output | RS-232 line data output to the remote RS-232 system; driver output swings to ±13.2 V maximum per the absolute maximum ratings. |
| 8 | RIN2 | input | RS-232 line data input from the remote RS-232 system; the input accepts ±25 V and includes an internal standard RS-232 load. |
| 9 | ROUT2 | output | Logic data output to the UART, referenced to VCC. |
| 10 | DIN2 | input | Logic data input from the UART; must be driven to a valid high or low level (VIH 2 V at 3.3 V, 2.4 V at 5 V; VIL 0.8 V max). |
| 11 | DIN1 | input | Logic data input from the UART; must be driven to a valid high or low level (VIH 2 V at 3.3 V, 2.4 V at 5 V; VIL 0.8 V max). |
| 12 | ROUT1 | output | Logic data output to the UART, referenced to VCC. |
| 13 | RIN1 | input | RS-232 line data input from the remote RS-232 system; the input accepts ±25 V and includes an internal standard RS-232 load. |
| 14 | DOUT1 | output | RS-232 line data output to the remote RS-232 system; driver output swings to ±13.2 V maximum per the absolute maximum ratings. |
| 15 | GND | power_in | Ground reference for all device voltages and the RS-232 ports. |
| 16 | VCC | power_in | Supply voltage input, connected to an external 3 V to 5.5 V supply (recommended 3.3 V or 5 V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Interface |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `MAX3232IDWR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `max3232idwr-etched.step` / `max3232idwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max3232idwr.step` / `max3232idwr.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/max3232) (30 pp, sha256 `c9696cf31b518336`, retrieved 2026-10-07, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/max3232idwr-datasheet.pdf)