MAX202EIM from HGSEMI, in a SOP-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 charge-pump flying capacitor C1 (0.1 µF, 16 V) used by the voltage doubler to generate V+.
2	V+	power_out	Positive charge-pump output, approximately +10 V. Bypass to GND with a 0.1-µF capacitor (C3, 6.3 V or higher). Absolute maximum range VCC-0.3 V to +14 V.
3	C1-	passive	Negative terminal of charge-pump flying capacitor C1 (0.1 µF, 16 V).
4	C2+	passive	Positive terminal of charge-pump flying capacitor C2 (0.1 µF, 16 V) used by the voltage inverter to generate V-.
5	C2-	passive	Negative terminal of charge-pump flying capacitor C2 (0.1 µF, 16 V).
6	V-	power_out	Negative charge-pump output, approximately -10 V. Bypass to GND with a 0.1-µF capacitor (C4, 16 V). Absolute maximum range -14 V to +0.3 V.
7	DOUT2	output	RS-232 line driver 2 output. Swings between V+ and V- (approximately ±10 V) to drive an RS-232 line. Inverting: VOH ≈ 9 V (DIN=L), VOL ≈ -9 V (DIN=H). ±15-kV HBM ESD protected. Short-circuit current ±10 to ±60 mA.
8	RIN2	input	RS-232 line receiver 2 input. Accepts ±30 V RS-232 signal levels. Input resistance 3-7 kΩ (typ 5 kΩ). Schmitt-trigger thresholds: VIT+ typ 1.7 V, VIT- typ 1.2 V, hysteresis typ 0.5 V. ±15-kV HBM ESD protected.
9	ROUT2	output	CMOS/TTL-level receiver 2 output. Inverted with respect to RIN2. VOH ≥ 3.5 V at IOH = -1 mA; VOL ≤ 0.4 V at IOL = 1.6 mA. High when RIN2 is open or driven low.
10	DIN2	input	CMOS/TTL-level line driver 2 input. VIH ≥ 2 V, VIL ≤ 0.8 V. Inverted at DOUT2.
11	DIN1	input	CMOS/TTL-level line driver 1 input. VIH ≥ 2 V, VIL ≤ 0.8 V. Inverted at DOUT1.
12	ROUT1	output	CMOS/TTL-level receiver 1 output. Inverted with respect to RIN1. VOH ≥ 3.5 V at IOH = -1 mA; VOL ≤ 0.4 V at IOL = 1.6 mA. High when RIN1 is open or driven low.
13	RIN1	input	RS-232 line receiver 1 input. Accepts ±30 V RS-232 signal levels. Input resistance 3-7 kΩ (typ 5 kΩ). Schmitt-trigger thresholds: VIT+ typ 1.7 V, VIT- typ 1.2 V, hysteresis typ 0.5 V. ±15-kV HBM ESD protected.
14	DOUT1	output	RS-232 line driver 1 output. Swings between V+ and V- (approximately ±10 V). Inverting: VOH ≈ 9 V (DIN=L), VOL ≈ -9 V (DIN=H). ±15-kV HBM ESD protected. Short-circuit current ±10 to ±60 mA.
15	GND	power_in	Device ground. Reference for all voltages.
16	VCC	power_in	Positive supply voltage input. Recommended 4.5 V to 5.5 V (nom 5 V). Absolute max 6 V. Supply current typ 8 mA, max 15 mA (no load). Bypass to GND with at least 0.1 µF.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-16
Category	Interface
Pins	16

Ordering variants

Same part, different packaging or reel option.

MAX202EIM/TR
MAX202ECM/TR
MAX202EIN
MAX202ECN
MAX202EIMT/TR
MAX202ECMT/TR

CAD (KiCad official)

Symbol: MAX202EIM
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HGSEMI datasheet (13 pp, sha256 d669a5a448fb5d49, 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