SP3223EEA-L from MaxLinear, in a SSOP-20-208mil. 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	EN	input	Receiver Enable (active-low). Apply logic LOW for normal operation; apply logic HIGH to disable receiver outputs (high-Z state). TTL/CMOS logic input.
2	C1+	passive	Positive terminal of the voltage-doubler charge-pump capacitor (typ. 0.1µF at 3.3V, 0.047µF at 5V). Connects to external flying capacitor for the +V charge pump.
3	V+	power_out	Regulated +5.5V output generated by the internal charge pump. Connect a 0.1µF (0.33µF at 5V) reservoir capacitor to GND. Supplies the RS-232 driver positive rail.
4	C1-	passive	Negative terminal of the voltage-doubler charge-pump capacitor. Pairs with C1+ for the flying capacitor of the +V charge pump.
5	C2+	passive	Positive terminal of the inverting charge-pump capacitor. Connects to external flying capacitor for the -V charge pump.
6	C2-	passive	Negative terminal of the inverting charge-pump capacitor. Pairs with C2+ for the flying capacitor of the -V charge pump.
7	V-	power_out	Regulated -5.5V output generated by the internal charge pump. Connect a 0.1µF (0.33µF at 5V) reservoir capacitor to GND. Supplies the RS-232 driver negative rail.
8	T2OUT	output	RS-232 driver #2 output. ±5.4V typical swing loaded with 3kΩ. Short-circuit protected to GND indefinitely.
9	R2IN	input	RS-232 receiver #2 input. ±15V input range, 5kΩ typical input resistance with internal pull-down. Inverting receiver converts ±5V EIA/TIA-232 levels to TTL/CMOS.
10	R2OUT	output	TTL/CMOS receiver #2 output. Inverted logic level output of the R2IN receiver. VOH = Vcc-0.1V typ, VOL = 0.4V max at 1.6mA.
11	STATUS	output	TTL/CMOS status output indicating online and shutdown status of the AUTO ON-LINE circuitry. HIGH when receiver activity is present, LOW when inactive. VOH = Vcc-0.6V min, VOL = 0.4V max.
12	T2IN	input	TTL/CMOS driver #2 logic input. Feeds the T2OUT RS-232 driver. Input thresholds: VIL = 0.8V max, VIH = 2.0V min. Unused inputs should be tied to GND or Vcc.
13	T1IN	input	TTL/CMOS driver #1 logic input. Feeds the T1OUT RS-232 driver. Input thresholds: VIL = 0.8V max, VIH = 2.0V min. Unused inputs should be tied to GND or Vcc.
14	ONLINE	input	AUTO ON-LINE override (active-low). Apply logic HIGH to override AUTO ON-LINE circuitry and keep drivers active continuously (SHUTDOWN must also be HIGH). Refer to truth table.
15	R1OUT	output	TTL/CMOS receiver #1 output. Inverted logic level output of the R1IN receiver. VOH = Vcc-0.1V typ, VOL = 0.4V max at 1.6mA.
16	R1IN	input	RS-232 receiver #1 input. ±15V input range, 5kΩ typical input resistance with internal pull-down. Inverting receiver converts ±5V EIA/TIA-232 levels to TTL/CMOS.
17	T1OUT	output	RS-232 driver #1 output. ±5.4V typical swing loaded with 3kΩ. Short-circuit protected to GND indefinitely.
18	GND	power_in	Ground reference for the device.
19	VCC	power_in	+3.0V to +5.5V supply voltage. Bypass to GND with a 0.1µF ceramic capacitor placed close to the pin.
20	SHUTDOWN	input	Shutdown control (active-low). Apply logic LOW to shut down drivers and charge pump, overriding all AUTO ON-LINE circuitry and ONLINE (refer to truth table). Reduces supply current to typ 1µA.

Key specifications

Parameter	Value
Manufacturer	MaxLinear
Package	SSOP-20-208mil
Category	Interface
Pins	20

Ordering variants

Same part, different packaging or reel option.

SP3223EEA-L
SP3223EEA-LEBEA-L
SP3223EEA-LEUEA-L
SP3223EEA-LEY-L
SP3223EEA-LEBEY-L
SP3223EEA-LEUEY-L

CAD (KiCad official)

Symbol: SP3223EEA-L
Footprint: Package_SO:SSOP-20_5.3x7.2mm_P0.65mm
3D model: SSOP-20-208mil (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sp3223eea-l.step`	267 KB	You want the bare part, or you mark your own boards.
`sp3223eea-l-etched.step`	2.8 MB	You want the part with `SP3223EEA-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 327 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 59c6e5dfb526c896, 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