SIT232ESE

@@ -0,0 +1,55 @@+# SIT232ESE++**SIT** · RS232 ICs · SO-16++SIT232ESE from SIT, in a SO-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 voltage-doubler charge-pump flying capacitor C1 (typ. 1uF to C1-). |+| 2 | V+ | power_out | Voltage-doubler charge-pump output (approximately +10V no-load). Bypass to GND with a 1uF storage capacitor (C3). |+| 3 | C1- | passive | Negative terminal of the voltage-doubler charge-pump flying capacitor C1. |+| 4 | C2+ | passive | Positive terminal of the inverting charge-pump flying capacitor C2 (typ. 1uF to C2-). |+| 5 | C2- | passive | Negative terminal of the inverting charge-pump flying capacitor C2. |+| 6 | V- | power_out | Inverting charge-pump output (approximately -10V no-load). Bypass to GND with a 1uF storage capacitor (C4). |+| 7 | T2OUT | output | RS-232 level output of transmitter channel 2. Output swing typically ±5V (min) to ±7.3V (typ) into a 3kΩ load; short-circuit current limited to ±60mA max. |+| 8 | R2IN | input | RS-232 level input of receiver channel 2. Accepts ±30V, input impedance 3-7 kΩ (typ 5 kΩ). Thresholds: VRIL 0.8V min, VRIH 2.4V max. |+| 9 | R2OUT | output | CMOS/TTL logic output of receiver channel 2 (inverting). VOL ≤ 0.4V @ 3.2mA, VOH ≥ 3.5V @ -1mA. |+| 10 | T2IN | input | TTL/CMOS logic input to transmitter channel 2. VIL max 0.8V, VIH min 2V, hysteresis 0.3V typ, input current ±10 uA max. |+| 11 | T1IN | input | TTL/CMOS logic input to transmitter channel 1. VIL max 0.8V, VIH min 2V, hysteresis 0.3V typ, input current ±10 uA max. |+| 12 | R1OUT | output | CMOS/TTL logic output of receiver channel 1 (inverting). VOL ≤ 0.4V @ 3.2mA, VOH ≥ 3.5V @ -1mA. |+| 13 | R1IN | input | RS-232 level input of receiver channel 1. Accepts ±30V, input impedance 3-7 kΩ (typ 5 kΩ). |+| 14 | T1OUT | output | RS-232 level output of transmitter channel 1. Output swing typically ±5V (min) to ±7.3V (typ) into a 3kΩ load; short-circuit current limited to ±60mA max. |+| 15 | GND | power_in | Ground reference for the device. Common return for VCC, V+, V-, and all signal thresholds. |+| 16 | VCC | power_in | Positive supply input, 5V ±10% (absolute max 6V). Quiescent supply current 5 mA typ, 10 mA max (no load). Decouple to GND with a 1uF capacitor placed close to the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | SIT |+| Package | SO-16 |+| Category | Interface |+| Pins | 16 |++## Ordering variants++- `SIT232ESEESE`++## CAD (KiCad official)++- Symbol: `SIT232ESE`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SO-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [SIT datasheet](docs/sit232ese-datasheet.pdf) (9 pp, sha256 `f6cc73b5e7143964`, 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/sit232ese-datasheet.pdf)

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