BL13232ESO

@@ -0,0 +1,56 @@+# BL13232ESO++**BL Shanghai Belling** · RS232 ICs · SOP-16++BL13232ESO from BL Shanghai Belling, 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 lead of charge-pump flying capacitor C1. Connect a 0.1 µF (Vcc=3.3V) or 0.047 µF (Vcc=5V) ceramic capacitor between C1+ and C1-. |+| 2 | V+ | power_out | Positive charge-pump output for storage capacitor only (typ +2×VCC). Connect a 0.1 µF (Vcc=3.3V) or 0.33 µF (Vcc=5V) reservoir capacitor from V+ to GND. |+| 3 | C1- | passive | Negative lead of charge-pump flying capacitor C1. |+| 4 | C2+ | passive | Positive lead of charge-pump flying capacitor C2. Connect a 0.1 µF (Vcc=3.3V) or 0.33 µF (Vcc=5V) ceramic capacitor between C2+ and C2-. |+| 5 | C2- | passive | Negative lead of charge-pump flying capacitor C2. |+| 6 | V- | power_out | Negative charge-pump output for storage capacitor only (typ -2×VCC). Connect a 0.1 µF (Vcc=3.3V) or 0.33 µF (Vcc=5V) reservoir capacitor from V- to GND. |+| 7 | DOUT2 | output | RS-232 line-driver output for channel 2. Swings approximately ±5.4V into a 3 kΩ load; short-circuit current typ ±30 mA. |+| 8 | RIN2 | input | RS-232 line-receiver input for channel 2. Input voltage range ±25V; input resistance 3-7 kΩ. Positive threshold typ 1.5-2.0V, hysteresis typ 0.4V. |+| 9 | ROUT2 | output | TTL/CMOS receiver output for channel 2. VOH ≥ VCC-0.6V at -1 mA; VOL ≤ 0.4V at 1.6 mA. |+| 10 | DIN2 | input | TTL/CMOS driver input for channel 2. Accepts 5V logic input even with 3.3V supply. VIH ≥ 2V (VCC=3.3V) / 2.4V (VCC=5V); VIL ≤ 0.8V. |+| 11 | DIN1 | input | TTL/CMOS driver input for channel 1. Accepts 5V logic input even with 3.3V supply. VIH ≥ 2V (VCC=3.3V) / 2.4V (VCC=5V); VIL ≤ 0.8V. |+| 12 | ROUT1 | output | TTL/CMOS receiver output for channel 1. VOH ≥ VCC-0.6V at -1 mA; VOL ≤ 0.4V at 1.6 mA. |+| 13 | RIN1 | input | RS-232 line-receiver input for channel 1. Input voltage range ±25V; input resistance 3-7 kΩ. Positive threshold typ 1.5-2.0V, hysteresis typ 0.4V. |+| 14 | DOUT1 | output | RS-232 line-driver output for channel 1. Swings approximately ±5.4V into a 3 kΩ load; short-circuit current typ ±30 mA. |+| 15 | GND | power_in | Ground reference (0V). |+| 16 | VCC | power_in | Supply voltage. Single supply 3V to 5.5V (3.3V ±0.3V or 5V ±0.5V typical). Bypass with a 0.1 µF capacitor to GND. ICC typ 1.5 mA (no load). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | BL Shanghai Belling |+| Package | SOP-16 |+| Category | Comm/UART |+| Pins | 16 |++## Ordering variants++- `BL13232ESOESO`+- `BL13232ESOETS`++## CAD (KiCad official)++- Symbol: `BL13232ESO`+- 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:** [BL Shanghai Belling datasheet](docs/bl13232eso-datasheet.pdf) (7 pp, sha256 `07cda8603d0a6a3a`, 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/bl13232eso-datasheet.pdf)

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