ST232CDR

@@ -0,0 +1,61 @@+# ST232CDR++**STMicroelectronics** · RS232 ICs · SOIC-16++ST232CDR 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 (voltage doubler). Connect a 0.1 µF capacitor between C1+ and C1- (pin 3). |+| 2 | V+ | power_out | Doubled voltage terminal, approximately +10 V generated by the internal charge pump. Bypass to GND with a 0.1 µF capacitor. |+| 3 | C1- | passive | Negative terminal for the first charge pump capacitor (voltage doubler). Connect a 0.1 µF capacitor between C1+ (pin 1) and C1-. |+| 4 | C2+ | passive | Positive terminal for the second charge pump capacitor (voltage inverter). Connect a 0.1 µF capacitor between C2+ and C2- (pin 5). |+| 5 | C2- | passive | Negative terminal for the second charge pump capacitor (voltage inverter). Connect a 0.1 µF capacitor between C2+ (pin 4) and C2-. |+| 6 | V- | power_out | Inverted voltage terminal, approximately -10 V generated by the internal charge pump. Bypass to GND with a 0.1 µF capacitor. |+| 7 | T2OUT | output | Second transmitter (driver) RS-232 output. Swings typically ±7.8 V into a 3 kΩ load; short-circuit current typ ±10 mA (max ±60 mA). |+| 8 | R2IN | input | Second receiver RS-232 input. Accepts ±30 V; input resistance 3-7 kΩ (typ 5 kΩ); logic thresholds VRIL=1.2 V typ / VRIH=1.7 V typ with 0.5 V typ hysteresis. |+| 9 | R2OUT | output | Second receiver TTL/CMOS output. VOL ≤ 0.4 V at 3.2 mA sink; VOH ≥ 3.5 V at 1 mA source. |+| 10 | T2IN | input | Second transmitter (driver) TTL/CMOS input. Logic threshold low 0.8 V max, high 2 V min; internally pulled up (~400 kΩ) to VCC per typical application. |+| 11 | T1IN | input | First transmitter (driver) TTL/CMOS input. Logic threshold low 0.8 V max, high 2 V min; internally pulled up (~400 kΩ) to VCC per typical application. |+| 12 | R1OUT | output | First receiver TTL/CMOS output. VOL ≤ 0.4 V at 3.2 mA sink; VOH ≥ 3.5 V at 1 mA source. |+| 13 | R1IN | input | First receiver RS-232 input. Accepts ±30 V; input resistance 3-7 kΩ (typ 5 kΩ); logic thresholds VRIL=1.2 V typ / VRIH=1.7 V typ with 0.5 V typ hysteresis. |+| 14 | T1OUT | output | First transmitter (driver) RS-232 output. Swings typically ±7.8 V into a 3 kΩ load; short-circuit current typ ±10 mA (max ±60 mA). |+| 15 | GND | power_in | Device ground reference (0 V) for logic-side and charge-pump return. |+| 16 | VCC | power_in | Positive supply voltage. Operating range 4.5 to 5.5 V; supply current 5 mA typ (10 mA max) no-load. Bypass to GND with a 0.1 µF capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SOIC-16 |+| Category | Interface |+| Pins | 16 |++## Ordering variants++- `ST232CDRST232CN`+- `ST232CDR`+- `ST232CDRST232BDR`+- `ST232CDRST232CWR`+- `ST232CDRST232BWR`+- `ST232CDRST232CTR`+- `ST232CDRST232BTR`++## CAD (KiCad official)++- Symbol: `ST232CDR`+- 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/st232cdr.pdf) (19 pp, sha256 `2affe3b6692a2dbb`, 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/st232cdr-datasheet.pdf)

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