GM3232ESA from GATEMODE, 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 the voltage-doubler charge-pump flying capacitor C1. Connect an external ceramic capacitor (0.1 µF at 3.3V, 0.047 µF at 5V) between C1+ (pin 1) and C1- (pin 3).
2	V+	power_out	Positive voltage output generated by the internal charge pump (approx. +2×VCC, ≤ +7V absolute max). Bypass to GND with an external capacitor (0.1 µF at 3.3V, 0.33 µF at 5V).
3	C1-	passive	Negative terminal of the voltage-doubler charge-pump flying capacitor C1. Pairs with C1+ (pin 1).
4	C2+	passive	Positive terminal of the inverting charge-pump flying capacitor C2. Connect an external ceramic capacitor (0.1 µF at 3.3V, 0.33 µF at 5V) between C2+ (pin 4) and C2- (pin 5).
5	C2-	passive	Negative terminal of the inverting charge-pump flying capacitor C2. Pairs with C2+ (pin 4).
6	V-	power_out	Negative voltage output generated by the internal inverting charge pump (approx. -2×VCC, down to -7V absolute max). Bypass to GND with an external capacitor (0.1 µF at 3.3V, 0.33 µF at 5V).
7	DOUT2	output	RS-232 driver output for channel 2. Inverted level-shifted version of DIN2 (pin 10); swings to ±V approximately, meets TIA/EIA-232-F, short-circuit protected to GND. ±15kV IEC 61000-4-2 ESD-protected.
8	RIN2	input	RS-232 receiver input for channel 2. Accepts ±25V line levels with 5 kΩ typical input impedance and internal pull-down (open input reads as high on ROUT). ±15kV IEC 61000-4-2 ESD-protected.
9	ROUT2	output	TTL/CMOS receiver output for channel 2. Inverted logic level of RIN2 (pin 8); VOH ≈ VCC-0.1 V at -1 mA, VOL ≈ 0.4 V at 1.6 mA. Defaults high when RIN2 is open.
10	DIN2	input	TTL/CMOS driver input for channel 2. VIH ≥ 2.0V (VCC=3.3V) or ≥ 2.4V (VCC=5V); VIL ≤ 0.8V. Drives DOUT2 (pin 7) with inverted RS-232 level.
11	DIN1	input	TTL/CMOS driver input for channel 1. VIH ≥ 2.0V (VCC=3.3V) or ≥ 2.4V (VCC=5V); VIL ≤ 0.8V. Drives DOUT1 (pin 14) with inverted RS-232 level.
12	ROUT1	output	TTL/CMOS receiver output for channel 1. Inverted logic level of RIN1 (pin 13); VOH ≈ VCC-0.1 V at -1 mA, VOL ≈ 0.4 V at 1.6 mA. Defaults high when RIN1 is open.
13	RIN1	input	RS-232 receiver input for channel 1. Accepts ±25V line levels with 5 kΩ typical input impedance and internal pull-down (open input reads as high on ROUT). ±15kV IEC 61000-4-2 ESD-protected.
14	DOUT1	output	RS-232 driver output for channel 1. Inverted level-shifted version of DIN1 (pin 11); swings to ±V approximately, meets TIA/EIA-232-F, short-circuit protected to GND. ±15kV IEC 61000-4-2 ESD-protected.
15	GND	power_in	Device ground reference for both logic and RS-232 sides.
16	VCC	power_in	Single supply input, +3.0V to +5.5V (absolute max +6V). Bypass to GND with a 1 µF ceramic capacitor placed close to the pin.

Key specifications

Parameter	Value
Manufacturer	GATEMODE
Package	SOP-16
Category	Comm/UART
Pins	16

Ordering variants

Same part, different packaging or reel option.

GM3232ESA
GM3232ESAETA
GM3232ESAEBA
GM3232ESAENA

CAD (KiCad official)

Symbol: GM3232ESA
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`gm3232esa.step`	217 KB	You want the bare part, or you mark your own boards.
`gm3232esa-etched.step`	2.6 MB	You want the part with `GM3232ESA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 635 faces against 267 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: GATEMODE datasheet (13 pp, sha256 d683feb35f456db6, 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