SP3232EBEN-L from MaxLinear, 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 of the voltage-doubler charge-pump capacitor C1 (0.1µF typical, 16V breakdown). Connects between C1+ and C1- to build the V+ rail (~2×VCC).
2	V+	power_out	Charge-pump output, regulated to approximately +5.5V regardless of VCC over the +3.0V to +5.5V input range. Bypass to GND with a 0.1µF capacitor (C3). Absolute max +7V;
3	C1-	passive	Negative terminal of the voltage-doubler charge-pump capacitor C1 (0.1µF typical). Paired with C1+ to generate V+.
4	C2+	passive	Positive terminal of the inverting charge-pump capacitor C2 (0.1µF typical). Paired with C2- to generate the negative V- rail.
5	C2-	passive	Negative terminal of the inverting charge-pump capacitor C2 (0.1µF typical). Paired with C2+ to generate V-.
6	V-	power_out	Charge-pump output regulated to approximately -5.5V. Bypass to GND with a 0.1µF capacitor (C4). Absolute max -7V;
7	T2OUT	output	RS-232 driver 2 output. Inverting level-shifted driver output; typical swing ±5.4V (min ±5.0V) into a 3kΩ load. Short-circuit and ±15kV ESD protected; tri-stated when device is shut down.
8	R2IN	input	RS-232 receiver 2 input. Accepts ±25V input range with ~5kΩ input resistance and ~0.3V hysteresis. Internal 5kΩ pulldown holds RxOUT HIGH when input is open.
9	R2OUT	output	TTL/CMOS receiver 2 output. Drives VOL ≤ 0.4V at 1.6mA and VOH ≥ VCC-0.6V at -1.0mA. Inverted with respect to R2IN.
10	T2IN	input	TTL/CMOS driver 2 input. Logic threshold LOW ≤ 0.8V, HIGH ≥ 2.0V (VCC=3.3V) or ≥ 2.4V (VCC=5.0V); ~250mV hysteresis. Inverted to T2OUT.
11	T1IN	input	TTL/CMOS driver 1 input. Logic threshold LOW ≤ 0.8V, HIGH ≥ 2.0V (VCC=3.3V) or ≥ 2.4V (VCC=5.0V); ~250mV hysteresis. Inverted to T1OUT.
12	R1OUT	output	TTL/CMOS receiver 1 output. Drives VOL ≤ 0.4V at 1.6mA and VOH ≥ VCC-0.6V at -1.0mA. Inverted with respect to R1IN.
13	R1IN	input	RS-232 receiver 1 input. Accepts ±25V input range with ~5kΩ input resistance and ~0.3V hysteresis. Internal 5kΩ pulldown holds RxOUT HIGH when input is open.
14	T1OUT	output	RS-232 driver 1 output. Inverting level-shifted driver output; typical swing ±5.4V (min ±5.0V) into a 3kΩ load. Short-circuit and ±15kV ESD protected.
15	GND	power_in	Device ground reference for logic and charge-pump return.
16	VCC	power_in	Positive supply, +3.0V to +5.5V (absolute max +6V). Decouple to GND with a 0.1µF bypass capacitor (C5) placed close to the pin. Typical no-load supply current ~0.3mA.

Key specifications

Parameter	Value
Manufacturer	MaxLinear
Package	SOIC-16
Category	Interface
Pins	16

Ordering variants

Same part, different packaging or reel option.

SP3232EBEN-L
SP3232EBEN/TR
SP3232EBEN-L/TR
SP3232EBCN
SP3232EBCN/TR
SP3232EBCA
SP3232EBCA/TR
SP3232EBEA
SP3232EBEA/TR
SP3232EBCP
SP3232EBEP
SP3232EBCT
SP3232EBCT/TR
SP3232EBET
SP3232EBET/TR
SP3232EBCY
SP3232EBCY/TR
SP3232EBEY
SP3232EBEY/TR

CAD (KiCad official)

Symbol: SP3232EBEN-L
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sp3232eben-l.step`	217 KB	You want the bare part, or you mark your own boards.
`sp3232eben-l-etched.step`	2.8 MB	You want the part with `SP3232EBEN-L` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 700 faces against 267 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: MaxLinear datasheet (20 pp, sha256 a5b7a7bff614aac4, 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