SP3232EEY-L from MaxLinear, in a TSSOP-16. Pinout and pin descriptions extracted from the 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 flying capacitor (0.1uF typ to C1-).
2	V+	power_out	+5.5V charge-pump output rail. Bypass to GND (or VCC) with a 0.1uF capacitor.
3	C1-	passive	Negative terminal of the voltage-doubler charge-pump flying capacitor.
4	C2+	passive	Positive terminal of the inverting charge-pump flying capacitor (0.1uF typ to C2-).
5	C2-	passive	Negative terminal of the inverting charge-pump flying capacitor.
6	V-	power_out	-5.5V charge-pump output rail. Bypass to GND (or VCC) with a 0.1uF capacitor.
7	T2OUT	output	RS-232 driver #2 output (typ +/-5.4V swing into 3kOhm load). Short-circuit protected (+/-60mA).
8	R2IN	input	RS-232 receiver #2 input. Accepts +/-15V (abs max +/-25V) with typical 5kOhm input resistance and hysteresis of ~0.3V.
9	R2OUT	output	TTL/CMOS receiver #2 output (rail-to-rail on VCC).
10	T2IN	input	TTL/CMOS driver #2 input. Logic thresholds: VIL <= 0.8V, VIH >= 2.0V (VCC=3.3V) or 2.4V (VCC=5.0V).
11	T1IN	input	TTL/CMOS driver #1 input. Logic thresholds: VIL <= 0.8V, VIH >= 2.0V (VCC=3.3V) or 2.4V (VCC=5.0V).
12	R1OUT	output	TTL/CMOS receiver #1 output (rail-to-rail on VCC).
13	R1IN	input	RS-232 receiver #1 input. Accepts +/-15V (abs max +/-25V) with typical 5kOhm input resistance and hysteresis of ~0.3V.
14	T1OUT	output	RS-232 driver #1 output (typ +/-5.4V swing into 3kOhm load). Short-circuit protected (+/-60mA).
15	GND	power_in	Device ground reference.
16	VCC	power_in	Positive supply, 3.0V to 5.5V. Bypass to GND with a 0.1uF capacitor. Typ ICC = 0.3mA (no load, VCC=3.3V).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SP3232EEY-L
SP3232EEY-L/TR
SP3232ECY-L
SP3232ECY-L/TR
SP3232ECA-L
SP3232ECA-L/TR
SP3232EEA-L
SP3232EEA-L/TR
SP3232ECN-L
SP3232ECN-L/TR
SP3232EEN-L
SP3232EEN-L/TR
SP3232ECT-L/TR
SP3232EET-L
SP3232EET-L/TR

CAD (KiCad official)

Symbol: SP3232EEY-L
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sp3232eey-l.step`	205 KB	You want the bare part, or you mark your own boards.
`sp3232eey-l-etched.step`	2.5 MB	You want the part with `SP3232EEY-L` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 631 faces against 255 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 (21 pp, sha256 657cf6a156b351de, 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