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)

Provenance

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

Datasheet: HTCSEMI datasheet (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