# HT3232ARZ

**HTCSEMI** · Buffer/Driver/Transceiver · SOIC-16

HT3232ARZ from HTCSEMI, 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 flying capacitor C1 (0.1 µF typical). Works with C1- to generate the doubled V+ rail. |
| 2 | V+ | power_out | Doubled voltage output from the charge pump (approximately 2 × VCC). Requires a 0.1 µF reservoir capacitor to GND. Absolute max (VCC − 0.3) to 7 V. |
| 3 | C1- | passive | Negative terminal for the first charge-pump flying capacitor C1 (0.1 µF typical). |
| 4 | C2+ | passive | Positive terminal for the second charge-pump flying capacitor C2 (0.1 µF typical). Works with C2- to generate the inverted V- rail. |
| 5 | C2- | passive | Negative terminal for the second charge-pump flying capacitor C2 (0.1 µF typical). |
| 6 | V- | power_out | Inverted (negative) charge-pump output, approximately −VCC. Requires a 0.1 µF reservoir capacitor to GND. Absolute range 0.3 to -7 V. |
| 7 | T2OUT | output | Second transmitter RS-232 output. Drives the RS-232 line to ±5.4 V typical at VCC = 5.0 V (±4.0 V at VCC = 3.3 V) into a 3 kΩ load. Short-circuit current limited to ±60 mA. |
| 8 | R2IN | input | Second receiver RS-232 input. Accepts ±25 V RS-232 line signals. Input resistance 3-7 kΩ (5 kΩ typ), thresholds VIL ≥ 0.6 V and VIH ≤ 2.4 V, hysteresis 0.3 V typ. |
| 9 | R2OUT | output | Second receiver TTL/CMOS output. Drives logic-level output from the RS-232 input; VOL ≤ 0.4 V at 1.6 mA (VCC = 3.3 V), VOH ≥ VCC − 0.6 V at −0.5 mA. |
| 10 | T2IN | input | Second transmitter TTL/CMOS input. Logic-level input driving the RS-232 transmitter. VIL ≤ 0.8 V, VIH ≥ 2.0 V (VCC = 3.3 V), 250 mV typical hysteresis, ±1 µA max leakage. |
| 11 | T1IN | input | First transmitter TTL/CMOS input. Logic-level input driving the RS-232 transmitter. VIL ≤ 0.8 V, VIH ≥ 2.0 V (VCC = 3.3 V), 250 mV typical hysteresis. |
| 12 | R1OUT | output | First receiver TTL/CMOS output. Drives logic-level output from the RS-232 input; VOL ≤ 0.4 V at 1.6 mA (VCC = 3.3 V), VOH ≥ VCC − 0.6 V at −0.5 mA. |
| 13 | R1IN | input | First receiver RS-232 input. Accepts ±25 V RS-232 line signals. Input resistance 3-7 kΩ (5 kΩ typ), thresholds VIL ≥ 0.6 V and VIH ≤ 2.4 V. |
| 14 | T1OUT | output | First transmitter RS-232 output. Drives the RS-232 line to ±5.4 V typical at VCC = 5.0 V (±4.0 V at VCC = 3.3 V) into a 3 kΩ load. Short-circuit current limited to ±60 mA. |
| 15 | GND | power_in | Device ground reference. Common return for the supply, charge-pump capacitors and RS-232 signalling. |
| 16 | VCC | power_in | Positive supply input, 3.0 V to 5.5 V (nominal 3.3 V or 5 V). Requires a 0.1 µF bypass capacitor to GND. ISUPPLY ≈ 2.5 mA typ at 3.3 V, 6 mA typ at 5 V (no load). Absolute max −0.3 to 6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |

## Ordering variants

Same part, different packaging or reel option.

- `HT3232ARZANZ`
- `HT3232ARZ`
- `HT3232ARZARWZ`
- `HT3232ARZARTZ`
- `HT3232ARZARSZ`
- `HT3232ARZARQZ`

## CAD (KiCad official)

- Symbol: `HT3232ARZ`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `ht3232arz-etched.step` / `ht3232arz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht3232arz.step` / `ht3232arz.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HTCSEMI datasheet](docs/ht3232arz-datasheet.pdf) (13 pp, sha256 `ebd757e3d17455ba`, 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/ht3232arz-datasheet.pdf)