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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

SP3223EEY-L

MaxLinear · RS232 ICs · TSSOP-20

SP3223EEY-L from MaxLinear, in a TSSOP-20. 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; apply logic LOW for normal operation, apply logic HIGH to disable receiver outputs to high-Z state.
2	C1+	passive	Positive terminal of the voltage doubler charge-pump capacitor, typically 0.1µF for 3.3V operation.
3	V+	power_out	Regulated +5.5V output generated by charge pump from single VCC supply.
4	C1-	passive	Negative terminal of the voltage doubler charge-pump capacitor, typically 0.1µF for 3.3V operation.
5	C2+	passive	Positive terminal of the inverting charge-pump capacitor, typically 0.1µF for 3.3V operation.
6	C2-	passive	Negative terminal of the inverting charge-pump capacitor, typically 0.1µF for 3.3V operation.
7	V-	power_out	Regulated -5.5V output generated by charge pump from single VCC supply.
8	T2OUT	output	RS-232 Driver output with regulated ±5.0V to ±5.4V swing, protected against continuous short-circuit to ground.
9	R2IN	input	RS-232 receiver input with -15V to +15V input range and 300mV hysteresis, 5kΩ pull-down resistor to ground.
10	R2OUT	output	TTL/CMOS receiver output, inverted from RS-232 input, disabled by EN pin to high-Z state.
11	STATUS	output	TTL/CMOS output indicating online and shutdown status; LOW when shutdown, HIGH when enabled and cable connected.
12	T2IN	input	TTL/CMOS driver input for T2OUT; unused driver inputs should be connected to GND or VCC.
13	T1IN	input	TTL/CMOS driver input for T1OUT; unused driver inputs should be connected to GND or VCC.
14	ONLINE	input	Apply logic HIGH to override AUTO ON-LINE® circuitry keeping drivers active; SHUTDOWN must also be logic HIGH.
15	R1OUT	output	TTL/CMOS receiver output, inverted from RS-232 input, disabled by EN pin to high-Z state.
16	R1IN	input	RS-232 receiver input with -15V to +15V input range and 300mV hysteresis, 5kΩ pull-down resistor to ground.
17	T1OUT	output	RS-232 Driver output with regulated ±5.0V to ±5.4V swing, protected against continuous short-circuit to ground.
18	GND	power_in	Ground; return path for all current and reference for logic levels.
19	VCC	power_in	Supply voltage input, +3.0V to +5.5V; drives internal charge pump for ±5.5V regulated outputs.
20	SHUTDOWN	input	Apply logic LOW to shut down drivers and charge pump, overriding all AUTO ON-LINE® circuitry and ONLINE pin.

Key specifications

Parameter	Value
Manufacturer	MaxLinear
Package	TSSOP-20
Category	Interface
Pins	20

CAD (KiCad official)

Symbol: SP3223EEY-L
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)
3D model files: sp3223eey-l-etched.step / sp3223eey-l-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sp3223eey-l.step / sp3223eey-l.glb are the bare package body.

Provenance

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

Datasheet: MaxLinear datasheet (20 pp, sha256 59c6e5dfb526c896, retrieved 2026-09-22, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF