ST3232BDR

@@ -0,0 +1,55 @@+# ST3232BDR++**UMW** · RS232 ICs · SOP-16++ST3232BDR from UMW, in a SOP-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 capacitor C1. Connect a 0.1µF ceramic capacitor between C1+ and C1- (pin 3). Part of the internal charge pump generating V+ ≈ +5.5V. |+| 2 | V+ | power_out | Regulated +5.5V rail generated internally by the charge pump. Bypass to GND with a 0.1µF capacitor. Do not load externally beyond the internal driver requirements. |+| 3 | C1- | passive | Negative terminal of the voltage-doubler charge-pump capacitor C1. Connect to C1+ (pin 1) through a 0.1µF ceramic capacitor. |+| 4 | C2+ | passive | Positive terminal of the inverting charge-pump capacitor C2. Connect a 0.1µF ceramic capacitor between C2+ and C2- (pin 5). Part of the internal charge pump generating V- ≈ -5.5V. |+| 5 | C2- | passive | Negative terminal of the inverting charge-pump capacitor C2. Connect to C2+ (pin 4) through a 0.1µF ceramic capacitor. |+| 6 | V- | power_out | Regulated -5.5V rail generated internally by the inverting charge pump. Bypass to GND with a 0.1µF capacitor. Do not load externally beyond the internal driver requirements. |+| 7 | DOUT2 | output | RS-232 driver output for channel 2. Swings between V+ and V- levels (typically ±5.4V). Meets TIA/EIA-232-F output specifications; short-circuit current typically ±35 mA. |+| 8 | RIN2 | input | RS-232 receiver input for channel 2. Accepts ±25V input swing with typical 5kΩ input resistance. Positive-going threshold typ 1.5V, negative-going typ 1.2V (VCC=3.3V); ~0.3V hysteresis. |+| 9 | ROUT2 | output | TTL/CMOS receiver output for channel 2. Drives to VCC-0.1V high / 0.4V low with 1.6 mA sink current. Level-translated version of RIN2 for the host UART. |+| 10 | DIN2 | input | TTL/CMOS driver input for channel 2. VIH ≥ 2.0V (VCC=3.3V) / 2.4V (VCC=5.5V); VIL ≤ 0.8V. Accepts up to 5.5V input even with 3.3V VCC. |+| 11 | DIN1 | input | TTL/CMOS driver input for channel 1. VIH ≥ 2.0V (VCC=3.3V) / 2.4V (VCC=5.5V); VIL ≤ 0.8V. Accepts up to 5.5V input even with 3.3V VCC. |+| 12 | ROUT1 | output | TTL/CMOS receiver output for channel 1. Drives to VCC-0.1V high / 0.4V low with 1.6 mA sink current. Level-translated version of RIN1 for the host UART. |+| 13 | RIN1 | input | RS-232 receiver input for channel 1. Accepts ±25V input swing with typical 5kΩ input resistance. Positive-going threshold typ 1.5V, negative-going typ 1.2V (VCC=3.3V); ~0.3V hysteresis. |+| 14 | DOUT1 | output | RS-232 driver output for channel 1. Swings between V+ and V- levels (typically ±5.4V). Meets TIA/EIA-232-F output specifications; short-circuit current typically ±35 mA. |+| 15 | GND | power_in | Device ground reference. All voltages are with respect to this network GND. |+| 16 | VCC | power_in | Supply voltage input, +3.0V to +5.5V. Typical supply current 1 mA (no load, VCC=3.3V). Bypass to GND with a 0.1µF ceramic capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-16 |+| Category | Comm/UART |+| Pins | 16 |++## Ordering variants++- `ST3232BDRBDR`++## CAD (KiCad official)++- Symbol: `ST3232BDR`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [UMW datasheet](docs/st3232bdr-datasheet.pdf) (11 pp, sha256 `72932421b486abe4`, 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/st3232bdr-datasheet.pdf)

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