# SIT3232EEAE

**SIT** · RS232 ICs · SSOP-16-208mil

SIT3232EEAE from SIT, 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 | C1+ | passive | Positive terminal for the first charge pump capacitor. |
| 2 | V+ | power_out | Doubled voltage terminal (charge pump output, up to VCC+7 V max). |
| 3 | C1- | passive | Negative terminal for the first charge pump capacitor. |
| 4 | C2+ | passive | Positive terminal for the second charge pump capacitor. |
| 5 | C2- | passive | Negative terminal for the second charge pump capacitor. |
| 6 | V- | power_out | Inverted voltage terminal (charge pump output, down to -7 V max). |
| 7 | T2OUT | output | Second transmitter RS-232 output, rated ±13.2 V. |
| 8 | R2IN | input | Second receiver RS-232 input, range ±25 V with 3 to 7 kΩ input impedance. |
| 9 | R2OUT | output | Second receiver logic output, -0.3 V to VCC+0.3 V. |
| 10 | T2IN | input | Second transmitter logic input, low level max 0.8 V and high level min 2 V. |
| 11 | T1IN | input | First transmitter logic input, low level max 0.8 V and high level min 2 V. |
| 12 | R1OUT | output | First receiver logic output, -0.3 V to VCC+0.3 V. |
| 13 | R1IN | input | First receiver RS-232 input, range ±25 V with 3 to 7 kΩ input impedance. |
| 14 | T1OUT | output | First transmitter RS-232 output, rated ±13.2 V. |
| 15 | GND | power_in | Ground. |
| 16 | VCC | power_in | Supply voltage, 3 V to 5.5 V operating, absolute max -0.3 to +6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SIT |
| Package | SSOP-16-208mil |
| Category | Interface ICs |
| Pins | 16 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Current with no Load | Isup |  |  | 2 | mA | VCC=3.3V, 25°C, C1-C4=1µF | 3 |
| Logic Control Low Level | VTTIN_L |  |  | 0.8 | V | T1IN,T2IN | 3 |
| Logic Control High Level | VTTIN_H | 2 |  |  | V | T1IN,T2IN | 3 |
| Input Logic Current | ITIN | -1 |  | 1 | μA | T1IN,T2IN | 3 |
| Receiver Output Logic-Low Voltage | VROL |  |  | 0.4 | V | IOUT=1.6mA, VCC=5V or 3.3V | 3 |
| Receiver Input Range | VRIN | -25 |  | 25 | V |  | 4 |
| Receiver Input Low Threshold (3.3V) | VRIL | 0.6 | 1.1 |  | V | VCC=3.3V | 4 |
| Receiver Input Low Threshold (5V) | VRIL | 0.8 | 1.5 |  | V | VCC=5V | 4 |
| Receiver Input High Threshold (3.3V) | VRIH |  | 1.5 | 2.4 | V | VCC=3.3V | 4 |
| Receiver Input High Threshold (5V) | VRIH |  | 1.9 | 2.4 | V | VCC=5V | 4 |
| Receiver Input Hysteresis |  |  | 0.4 |  | V |  | 4 |
| Receiver Input Impedance | RRIN | 3 | 5 | 7 | kΩ |  | 4 |
| Transmitter Output Swing | VTOUT | 4 | 5 |  | V | All transmitter outputs loaded with 3kΩ to ground (printed ±) | 4 |
| Transmitter Output Impedance | RTOUT | 300 |  |  | Ω | VCC=0V, Transmitter Input=±2V | 4 |
| Transmitter Short-Circuit Current | Itsc |  | 60 |  | mA |  | 4 |
| ESD HBM |  |  | 15 |  | KV | R1IN,R2IN,T1OUT,T2OUT; HBM (printed ±15) | 5 |
| ESD Air Discharge |  |  | 15 |  | KV | R1IN,R2IN,T1OUT,T2OUT (printed ±15) | 5 |
| ESD Contact Discharge |  |  | 8 |  | KV | R1IN,R2IN,T1OUT,T2OUT (printed ±8) | 5 |
| Rate Speed |  | 120 |  |  | kbps | RL=3kΩ, CL=1000pF | 5 |
| Receiver Propagation delay tRPHL | tRPHL |  |  | 300 | ns | CL=150pF | 5 |
| Receiver Propagation delay tRPLH | tRPLH |  |  | 300 | ns | CL=150pF | 5 |
| Receiver skew /tRPHL-tRPLH/ |  |  |  | 150 | ns | CL=150pF | 5 |
| Transmitter skew /tTPHL-tTPLH/ |  |  |  | 150 | ns |  | 5 |
| Transmitter Slew Rate | SR | 4 |  | 30 | V/μs | RL=3kΩ~7kΩ, CL=150pF~1000pF, from -3.0V~3.0V or 3.0V~-3.0V | 5 |
| Supply voltage | VCC | -0.3 |  | 6 | V |  | 2 |
| Doubled Voltage Terminal | V+ |  |  | 7 | V | printed VCC-0.3~+7 | 2 |
| Inverted Voltage Terminal | V- | -7 |  | 0.3 | V | printed +0.3~-7 | 2 |
| V+ + /V-/ |  |  |  | 13 | V |  | 2 |
| Transmitter Input Voltage Range | T1IN,T2IN | -0.3 |  | 6 | V |  | 2 |
| Receiver Input Voltage Range | R1IN,R2IN | -25 |  | 25 | V |  | 2 |
| Transmitter Output Voltage Range | T1OUT,T2OUT | -13.2 |  | 13.2 | V |  | 2 |
| Operating Temperature |  | -40 |  | 85 | °C |  | 2 |
| Storage Temperature |  | -60 |  | 150 | °C |  | 2 |
| Soldering Temperature |  |  |  | 300 | °C |  | 2 |
| Supply voltage range | VCC | 3 |  | 5.5 | V | Features list | 1 |

## CAD (KiCad official)

- Symbol: `SIT3232EEAE`
- Footprint: `Package_SO:SSOP-16_5.3x6.2mm_P0.65mm`
- 3D model: SSOP-16-208mil (KiCad packages3D, STEP)
- 3D model files: `sit3232eeae-etched.step` / `sit3232eeae-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sit3232eeae.step` / `sit3232eeae.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [SIT datasheet](docs/sit3232eeae-datasheet.pdf) (12 pp, sha256 `2714c7267d52ec1d`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/sit3232eeae-datasheet.pdf)