SIT3232EEUE

@@ -0,0 +1,55 @@+# SIT3232EEUE++**SIT** · RS232 ICs · TSSOP-16++SIT3232EEUE from SIT, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | C1+ | passive | Positive terminal of the first charge-pump flying capacitor (C1). Connect a 1µF capacitor between C1+ and C1- to enable the voltage-doubler stage that generates V+. |+| 2 | V+ | power_out | Doubled positive supply output from the internal charge pump (approximately +2×VCC). Bypass to GND with a 1µF capacitor. Absolute max VCC-0.3 to +7V. |+| 3 | C1- | passive | Negative terminal of the first charge-pump flying capacitor (C1). Pairs with C1+ via a 1µF external capacitor. |+| 4 | C2+ | passive | Positive terminal of the second charge-pump flying capacitor (C2). Connect a 1µF capacitor between C2+ and C2- to enable the inverter stage that generates V-. |+| 5 | C2- | passive | Negative terminal of the second charge-pump flying capacitor (C2). Pairs with C2+ via a 1µF external capacitor. |+| 6 | V- | power_out | Inverted (negative) supply output from the internal charge pump (approximately -2×VCC). Bypass to GND with a 1µF capacitor. Absolute max +0.3 to -7V. |+| 7 | T2OUT | output | Second RS-232 transmitter output (driver 2). Drives the external RS-232 line at ±4 to ±5V into a 3kΩ load; ESD protected to ±15kV HBM / ±8kV IEC contact. Absolute max output swing ±13.2V. |+| 8 | R2IN | input | Second RS-232 receiver input (receiver 2). Accepts ±25V RS-232-level signals; input impedance 3-7kΩ typ 5kΩ; thresholds VRIL 0.6V min / VRIH 2.4V max at VCC=3.3V. ESD protected to ±15kV HBM. |+| 9 | R2OUT | output | Second receiver logic-level output (CMOS). Drives VCC-referenced logic: VOL ≤ 0.4V @ 1.6mA, VOH ≥ VCC-0.6V @ 0.5mA. |+| 10 | T2IN | input | Second transmitter logic input (CMOS/TTL). VIL ≤ 0.8V, VIH ≥ 2V, 0.3V typ hysteresis, input current ≤ ±1µA. Absolute max -0.3 to +6V. |+| 11 | T1IN | input | First transmitter logic input (CMOS/TTL). VIL ≤ 0.8V, VIH ≥ 2V, 0.3V typ hysteresis, input current ≤ ±1µA. Absolute max -0.3 to +6V. |+| 12 | R1OUT | output | First receiver logic-level output (CMOS). Drives VCC-referenced logic: VOL ≤ 0.4V @ 1.6mA, VOH ≥ VCC-0.6V @ 0.5mA. |+| 13 | R1IN | input | First RS-232 receiver input (receiver 1). Accepts ±25V RS-232-level signals; input impedance 3-7kΩ typ 5kΩ; thresholds VRIL 0.6V min / VRIH 2.4V max at VCC=3.3V. ESD protected to ±15kV HBM. |+| 14 | T1OUT | output | First RS-232 transmitter output (driver 1). Drives the external RS-232 line at ±4 to ±5V into a 3kΩ load; short-circuit current 60mA max; ESD protected to ±15kV HBM / ±8kV IEC contact. |+| 15 | GND | power_in | Ground reference for all signals and the charge pump. |+| 16 | VCC | power_in | Positive supply input, 3.0V to 5.5V (typ 3.3V). Bypass to GND with a 1µF capacitor. Absolute max -0.3 to +6V; typical supply current 2mA (no load). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | SIT |+| Package | TSSOP-16 |+| Category | Interface |+| Pins | 16 |++## Ordering variants++- `SIT3232EEUEEUE`++## CAD (KiCad official)++- Symbol: `SIT3232EEUE`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [SIT datasheet](docs/sit3232eeue-datasheet.pdf) (12 pp, sha256 `2714c7267d52ec1d`, retrieved 2026-08-17, tier: lcsc)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/sit3232eeue-datasheet.pdf)

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