ST232BDR

@@ -0,0 +1,56 @@+# ST232BDR++**UMW** · RS232 ICs · SOP-16++ST232BDR 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 0.1 µF capacitor between C1+ (pin 1) and C1- (pin 3). |+| 2 | V+ | power_out | Regulated +2·VCC (approx. +10 V) output generated by the internal charge pump. Bypass to GND with a 0.1 µF capacitor. |+| 3 | C1- | passive | Negative terminal of the voltage-doubler charge-pump capacitor C1. Paired with C1+ (pin 1) via a 0.1 µF capacitor. |+| 4 | C2+ | passive | Positive terminal of the inverter charge-pump capacitor C2. Connect a 0.1 µF capacitor between C2+ (pin 4) and C2- (pin 5). |+| 5 | C2- | passive | Negative terminal of the inverter charge-pump capacitor C2. Paired with C2+ (pin 4) via a 0.1 µF capacitor. |+| 6 | V- | power_out | Regulated -2·VCC (approx. -10 V) output generated by the internal inverting charge pump. Bypass to GND with a 0.1 µF capacitor. |+| 7 | T2OUT | output | RS-232 driver 2 output. Swings between V+ and V- (typical ±5 V into a 3 kΩ load), inverted from the T2IN TTL/CMOS input. |+| 8 | R2IN | input | RS-232 receiver 2 input. Accepts EIA/TIA-232E line levels (±30 V absolute max) with an internal 3-7 kΩ pull-down and hysteresis (VIL≈0.8 V, VIH≈2.4 V). |+| 9 | R2OUT | output | TTL/CMOS receiver 2 output (inverted from R2IN). Drives VOL ≤ 0.4 V at 3.2 mA and VOH ≥ 3.5 V at -1 mA. |+| 10 | T2IN | input | TTL/CMOS driver 2 input. High-impedance CMOS input (VIL ≤ 0.8 V, VIH ≥ 2 V) whose logic level is inverted and level-shifted to the T2OUT RS-232 line driver. |+| 11 | T1IN | input | TTL/CMOS driver 1 input. High-impedance CMOS input (VIL ≤ 0.8 V, VIH ≥ 2 V) whose logic level is inverted and level-shifted to the T1OUT RS-232 line driver. |+| 12 | R1OUT | output | TTL/CMOS receiver 1 output (inverted from R1IN). Drives VOL ≤ 0.4 V at 3.2 mA and VOH ≥ 3.5 V at -1 mA. |+| 13 | R1IN | input | RS-232 receiver 1 input. Accepts EIA/TIA-232E line levels (±30 V absolute max) with an internal 3-7 kΩ pull-down and hysteresis (VIL≈0.8 V, VIH≈2.4 V). |+| 14 | T1OUT | output | RS-232 driver 1 output. Swings between V+ and V- (typical ±5 V into a 3 kΩ load), inverted from the T1IN TTL/CMOS input. |+| 15 | GND | power_in | Device ground reference and return path for the charge-pump bypass capacitors on V+ and V-. |+| 16 | VCC | power_in | Positive supply input, +4.5 V to +5.5 V. Typical quiescent supply current ICC ≤ 10 mA (no load, 25 °C). Bypass to GND with a 0.1 µF capacitor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | UMW |+| Package | SOP-16 |+| Category | Comm/UART |+| Pins | 16 |++## Ordering variants++- `ST232BDR`+- `ST232BDRST232CDR`++## CAD (KiCad official)++- Symbol: `ST232BDR`+- 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/st232bdr-datasheet.pdf) (10 pp, sha256 `2e25f6be595237d6`, 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/st232bdr-datasheet.pdf)

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