component
SIT232ESE
Public Made by Adomby adom
SIT RS232 ICs, SO-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownSIT232ESE
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
Same part, different packaging or reel option.
SIT232ESE
CAD (KiCad official)
- Symbol:
SIT232ESE - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SO-16 (KiCad packages3D, STEP)
- 3D model files:
sit232ese-etched.step/sit232ese-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sit232ese.step/sit232ese.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
sit232ese.step |
217 KB | You want the bare part, or you mark your own boards. |
sit232ese-etched.step |
2.4 MB | You want the part with SIT232ESE already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 604 faces against 267 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SIT datasheet (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).