SP3232EET-L from MaxLinear, in a SOIC-16-300mil. 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).
2	V+	power_out	+5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor (C3).
3	C1-	passive	Negative terminal of the voltage doubler charge-pump capacitor C1 (0.1µF typical).
4	C2+	passive	Positive terminal of the inverting charge-pump capacitor C2 (0.1µF typical).
5	C2-	passive	Negative terminal of the inverting charge-pump capacitor C2 (0.1µF typical).
6	V-	power_out	-5.5V output generated by the internal charge pump. Bypass to GND with a 0.1µF capacitor (C4).
7	T2OUT	output	RS-232 driver 2 output. ±5.4V typical swing, meets EIA/TIA-232-F voltage levels; short-circuit protected.
8	R2IN	input	RS-232 receiver 2 input. Accepts ±15V; 5kΩ typical input resistance to GND.
9	R2OUT	output	TTL/CMOS receiver 2 output. Inverted logic level of R2IN, referenced to VCC.
10	T2IN	input	TTL/CMOS driver 2 input. Logic-level input to driver 2; typ. 250mV input hysteresis.
11	T1IN	input	TTL/CMOS driver 1 input. Logic-level input to driver 1; typ. 250mV input hysteresis.
12	R1OUT	output	TTL/CMOS receiver 1 output. Inverted logic level of R1IN, referenced to VCC.
13	R1IN	input	RS-232 receiver 1 input. Accepts ±15V; 5kΩ typical input resistance to GND.
14	T1OUT	output	RS-232 driver 1 output. ±5.4V typical swing, meets EIA/TIA-232-F voltage levels; short-circuit protected.
15	GND	power_in	Ground reference. Common return for VCC, charge pump, and RS-232 outputs.
16	VCC	power_in	+3.0V to +5.5V supply voltage. Decouple with 0.1µF to GND close to the pin. Typical supply current 0.3mA (no load, 3.3V).

Key specifications

Parameter	Value
Manufacturer	MaxLinear
Package	SOIC-16-300mil
Category	Interface
Pins	16

Ordering variants

Same part, different packaging or reel option.

SP3232EET-L
SP3232EET-LEEN-L

CAD (KiCad official)

Symbol: SP3232EET-L
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16-300mil (KiCad packages3D, STEP)

Provenance

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

Datasheet: MaxLinear datasheet (23 pp, sha256 f37825c452a9f044, retrieved 2026-08-17, tier: manufacturer)
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