MAX3313ECUB+ from Maxim Integrated, in a MSOP-10. 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	VCC	power_in	+5V external power supply (4.5V to 5.5V operating range); decouple with a 0.1µF capacitor to ground.
2	C1-	passive	Negative terminal of the voltage inverter charge-pump capacitor.
3	INVALID	output	Valid signal detector output (MAX3313E); a logic high indicates that a valid RS-232 level is present on the receiver input.
4	TIN	input	TTL/CMOS transmitter input with no internal pullup resistor; VIL 0.8V max, VIH 2.4V min.
5	ROUT	output	TTL/CMOS receiver output; VOL 0.4V max at 1.6mA, VOH at least VCC-0.6V at -1.0mA.
6	RIN	input	±15kV ESD-protected RS-232 receiver input with 5kΩ input resistance, absolute maximum ±25V.
7	TOUT	output	±15kV ESD-protected RS-232-compatible transmitter output, ±3.7V minimum swing into 3kΩ, continuous short-circuit to GND allowed.
8	V-	power_out	-4.3V generated by the charge pump; connect a 0.1µF capacitor to ground.
9	C1+	passive	Positive terminal of the voltage inverter charge-pump capacitor.
10	GND	power_in	Ground.

Key specifications

Parameter	Value
Manufacturer	Maxim Integrated
Package	MSOP-10
Category	Interface ICs
Pins	10

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 Operation Range	VCC	4.5	5	5.5	V		2
Supply Current			100	250	µA	SHDN = VCC, no load	2
Input Logic Threshold Low	VIL			0.8	V	TIN	2
Input Logic Threshold High	VIH	2.4			V	TIN	2
Transmitter Input Hysteresis			0.5		V		2
Input Leakage Current		-1		1	µA	typ ±0.01	2
Receiver Output Voltage Low	VOL			0.4	V	IOUT = 1.6mA	2
INVALID Positive Threshold				2.7	V	Figure 7, positive threshold	2
INVALID Negative Threshold		-2.7			V	Figure 7, negative threshold	2
Receiver Input Threshold to INVALID Output Low		-0.3		0.3	V	Figure 7	2
INVALID Output Low	VOL			0.4	V	IOUT = 1.6mA	2
Receiver Thresholds to INVALID High			0.1		µs	Figure 7	2
Receiver Threshold to INVALID Low			30		µs	Figure 7	2
Receiver Input Threshold Low	VIL	0.8			V		3
Receiver Input Threshold High	VIH			2.4	V		3
Receiver Input Hysteresis			0.5		V		3
Receiver Input Resistance			5		kΩ		3
Transmitter Output Voltage Swing		3.7			V	Transmitter output loaded with 3kΩ to GND, ±	3
Transmitter Output Resistance		300			Ω	VCC = 0, transmitter output = ±2V (Note 1)	3
Output Short-Circuit Current			60		mA	±	3
Output Leakage Current		-25		25	µA	VOUT = ±12V, transmitter disabled	3
ESD-Protection Voltage			15		kV	Human Body Model, ±	3
Maximum Data Rate		460			kbps	RL = 3kΩ, CL = 1000pF	3
Receiver Propagation Delay	tPLH/tPHL		0.15		µs	Receiver input to receiver output, CL = 150pF	3
Transmitter Skew			100		ns		3
Receiver Skew			50		ns		3
Transition Region Slew Rate			11		V/µs	RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF, measured from +3V to -3V or from -3V to +3V	3
VCC to GND	VCC	-0.3		6	V		2
V- to GND	V-	-7		0.3	V		2
VCC + /V-/				13	V		2
TIN, SHDN to GND		-0.3		6	V	Input voltages	2
RIN to GND		-25		25	V	Input voltages	2
TOUT to GND		-13.2		13.2	V	Output voltages	2
Operating Temperature Range		0		70	°C	MAX331_ECUB	2
Junction Temperature				150	°C		2
Storage Temperature Range		-65		150	°C		2
Lead Temperature				300	°C	soldering, 10s	2

CAD (KiCad official)

Symbol: MAX3313ECUB+
Footprint: Package_SO:MSOP-10_3x3mm_P0.5mm
3D model: MSOP-10 (KiCad packages3D, STEP)
3D model files: max3313ecub-etched.step / max3313ecub-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3313ecub.step / max3313ecub.glb are the bare package body.

Provenance

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

Datasheet: Maxim Integrated datasheet (8 pp, sha256 018bac8fc58602c4, retrieved 2026-10-31, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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

MAX3313ECUB+

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3D Model

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