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MAX3232CSE

UMW · RS232 ICs · SOP-16

MAX3232CSE from UMW, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	C1+	passive	Positive terminal of the voltage-doubler charge-pump capacitor; external capacitor value per Table 1 (0.047 µF to 0.22 µF depending on VCC).
2	V+	power_out	Positive charge-pump output generating +5.5 V, with an absolute maximum of +7.0 V and a bypass capacitor CBYPASS per Table 1.
3	C1-	passive	Negative terminal of the voltage-doubler charge-pump capacitor, connected to the external C1 capacitor.
4	C2+	passive	Positive terminal of the inverting charge-pump capacitor; C2 to C4 values per Table 1 (0.1 µF to 1 µF depending on VCC).
5	C2-	passive	Negative terminal of the inverting charge-pump capacitor, connected to the external C2 capacitor.
6	V-	power_out	Negative charge-pump output generating -5.5 V, with an absolute maximum of -7.0 V.
7	DOUT2	output	RS-232 driver output 2; swings about ±5.0 V typical (±5.4 V max) into a 3 kΩ load and absolute output voltage is limited to ±13.2 V.
8	RIN2	input	RS-232 receiver input 2; receiver input voltage range is ±25 V.
9	ROUT2	output	TTL/CMOS receiver output 2; high level is VCC-0.6 V minimum at IOH = -1.0 mA and low level is 0.4 V maximum at IOL = 1.6 mA.
10	DIN2	input	TTL/CMOS driver input 2; low-level input is 0.8 V maximum, high-level input is 2.4 V minimum at VCC=5 V, and input voltage up to 5.5 V is allowed.
11	DIN1	input	TTL/CMOS driver input 1; low-level input is 0.8 V maximum, high-level input is 2.4 V minimum at VCC=5 V, and input voltage up to 5.5 V is allowed.
12	ROUT1	output	TTL/CMOS receiver output 1; high level is VCC-0.6 V minimum at IOH = -1.0 mA and low level is 0.4 V maximum at IOL = 1.6 mA.
13	RIN1	input	RS-232 receiver input 1; receiver input voltage range is ±25 V.
14	DOUT1	output	RS-232 driver output 1; swings about ±5.0 V typical (±5.4 V max) into a 3 kΩ load and absolute output voltage is limited to ±13.2 V.
15	GND	power_in	Ground reference for the device; all voltages are referenced to network GND.
16	VCC	power_in	Supply voltage input, 3.0 V to 5.5 V, with an absolute maximum of 6.0 V.

Key specifications

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

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply Current	ICC		0.3	1	mA	No load	5
Driver High-Level Output Voltage	VOH	5	5.4		V	DOUT at RL=3kΩ to GND, DIN=GND	5
Driver Low-Level Output Voltage	VOL	-5	-5.4		V	DOUT at RL=3kΩ to GND, DIN=VCC	5
High-Level Input Current	IIH	-1	0.01	1	μA	VI=VCC	5
Low-Level Input Current	IIL	-1	0.01	1	μA	VI at GND	5
Short-Circuit Output Current	IOS	-60	35	60	mA	VCC=3.6V, VOUT=0V	5
Output Resistance	rO	300			Ω	VCC, V+ and V- =0V, VOUT=±2.0V	5
Output Resistance	rO		10		MΩ	VCC, V+ and V- =0V, VOUT=±2.0V	5
Receiver Low-Level Output Voltage	VOL			0.4	V	IOL=1.6mA	5
Positive-Going Input Threshold Voltage	VIT+			2.4	V	VCC=3.3V	5
Input Resistance	RI	3	5	7	kΩ	VI=±3.0V~±25V	5
Maximum Data Rate		120	250		Kbit/s		6
Slew Rate, Transition Region	SR(tr)			35	V/μs	CL=220pF~1000pF	6
Supply Voltage (VCC=3.3V)	VCC	3	3.3	3.6	V	VCC=3.3V	4
Supply Voltage (VCC=5V)	VCC	4.5	5	5.5	V	VCC=5V	4
Driver and Control High-Level Input Voltage	VIH	2			V	VCC=3.3V, DIN	4
Driver and Control High-Level Input Voltage	VIH	2.4			V	VCC=5V, DIN	4
Driver and Control Low-Level Input Voltage	VIL			0.8	V	DIN	4
Driver and Control Input Voltage	VIN			5.5	V	DIN	4
Receiver Input Voltage	VRIN	-25		25	V		4
Supply Voltage Range	VCC	-0.3		6	V		3
Positive Output Supply Voltage Range	V+	-0.3		7	V	Note 2	3
Negative Output Supply Voltage Range	V-	-7		0.3	V	Note 2	3
Supply Voltage Difference	V+ - V-			13	V	Note 2	3
Input Voltage, Drivers	VIN	-0.3		6	V	Drivers	3
Input Voltage, Receivers	VIN	-25		25	V	Receivers	3
Output Voltage, Drivers	VOUT	-13.2		13.2	V	Drivers	3
Output Voltage, Receivers	VOUT	-0.3			V	Receivers; upper limit printed as VCC+0.3	3
Operating Virtual Junction Temperature	TJ			150	°C		3
Operating Free-Air Temperature (MAX3232C)		0		70	°C	MAX3232C	3
Junction to Ambient, SOP-16	θJA		105		°C/W	SOP-16	3

CAD (KiCad official)

Symbol: MAX3232CSE
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)
3D model files: max3232cse-etched.step / max3232cse-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3232cse.step / max3232cse.glb are the bare package body.

Provenance

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

Datasheet: UMW datasheet (12 pp, sha256 f5d14462460075a8, retrieved 2026-10-17, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (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