ST3232CDR

@@ -0,0 +1,62 @@+# ST3232CDR++**STMicroelectronics** · RS232 ICs · SOIC-16++ST3232CDR from STMicroelectronics, in a SOIC-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 for the first charge pump capacitor. Connect C1 (typ. 0.1 µF at 3 V, 0.047 µF at 5 V) between C1+ and C1-. |+| 2 | V+ | power_out | Doubled (positive) voltage terminal generated by the charge pump (approx. +2 x VCC). Requires reservoir capacitor C3 (typ. 0.1 µF at 3 V, 0.33 µF at 5 V) to GND. |+| 3 | C1- | passive | Negative terminal for the first charge pump capacitor. Connect C1 between C1+ (pin 1) and C1- (pin 3). |+| 4 | C2+ | passive | Positive terminal for the second charge pump capacitor. Connect C2 (typ. 0.1 µF at 3 V, 0.33 µF at 5 V) between C2+ and C2-. |+| 5 | C2- | passive | Negative terminal for the second charge pump capacitor. Connect C2 between C2+ (pin 4) and C2- (pin 5). |+| 6 | V- | power_out | Inverted (negative) voltage terminal generated by the charge pump inverter (approx. -2 x VCC). Requires reservoir capacitor C4 (typ. 0.1 µF at 3 V, 0.33 µF at 5 V) to GND. Absolute max 0.3 to -7 V. |+| 7 | T2OUT | output | Second transmitter (driver) RS-232 output. Output voltage swing typ. +/-5.4 V into 3 kOhm load; short-circuit current +/-60 mA max. |+| 8 | R2IN | input | Second receiver RS-232 input. Operating input range +/-25 V; input resistance 3-7 kOhm (typ. 5 kOhm); thresholds VRIL 0.6-1.5 V, VRIH up to 2.4 V. |+| 9 | R2OUT | output | Second receiver TTL/CMOS output. VOL <= 0.4 V at IOUT = 1.6 mA; VOH >= VCC-0.6 V at IOUT = -1 mA. |+| 10 | T2IN | input | Second transmitter (driver) TTL/CMOS input. VIL <= 0.8 V, VIH >= 2 V (VCC = 3.3 V) or 2.4 V (VCC = 5 V); typical input hysteresis 250 mV. |+| 11 | T1IN | input | First transmitter (driver) TTL/CMOS input. VIL <= 0.8 V, VIH >= 2 V (VCC = 3.3 V) or 2.4 V (VCC = 5 V); typical input hysteresis 250 mV. |+| 12 | R1OUT | output | First receiver TTL/CMOS output. VOL <= 0.4 V at IOUT = 1.6 mA; VOH >= VCC-0.6 V at IOUT = -1 mA. |+| 13 | R1IN | input | First receiver RS-232 input. Operating input range +/-25 V; input resistance 3-7 kOhm (typ. 5 kOhm); thresholds VRIL 0.6-1.5 V, VRIH up to 2.4 V. |+| 14 | T1OUT | output | First transmitter (driver) RS-232 output. Output voltage swing typ. +/-5.4 V into 3 kOhm load; short-circuit current +/-60 mA max. |+| 15 | GND | power_in | Ground reference for all supply, logic and RS-232 signals. |+| 16 | VCC | power_in | Positive supply voltage, 3.0 to 5.5 V operating (absolute max -0.3 to 6 V). Supply current typ. 0.3 mA at 3 V, 1 mA at 5 V (no load). Decouple with Cbypass to GND (0.1 µF at 3 V, 0.33 µF at 5 V). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOIC-16 |+| Category | Interface |+| Pins | 16 |++## Ordering variants++Same part, different packaging or reel option.++- `ST3232CDR`+- `ST3232BDR`+- `ST3232CWR`+- `ST3232BWR`+- `ST3232CTR`+- `ST3232BTR`++## CAD (KiCad official)++- Symbol: `ST3232CDR`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/st3232cdr.pdf) (18 pp, sha256 `38bf6fa5becf1b1f`, retrieved 2026-08-17, tier: manufacturer)+- **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/st3232cdr-datasheet.pdf)

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