MAX3227ECAE+T from Maxim Integrated, in a SSOP-16-208mil. 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	READY	output	Ready to Transmit output, active-high; READY goes high when V- goes below -4V and the device is ready to transmit.
2	C1+	passive	Positive terminal of the voltage-doubler charge-pump capacitor.
3	V+	power_out	+5.5V generated by the charge pump.
4	C1-	passive	Negative terminal of the voltage-doubler charge-pump capacitor.
5	C2+	passive	Positive terminal of the inverting charge-pump capacitor.
6	C2-	passive	Negative terminal of the inverting charge-pump capacitor.
7	V-	power_out	-5.5V generated by the charge pump.
8	R1IN	input	RS-232 receiver input; R_IN to GND is rated at ±25V absolute maximum.
9	R1OUT	output	TTL/CMOS receiver output.
10	INVALID	output	Valid signal detector output, active low; a logic high indicates that a valid RS-232 level is present on a receiver input.
11	T1IN	input	TTL/CMOS transmitter input; the inputs have no pullup resistors, so unused inputs should be connected to GND or VCC.
12	FORCEON	input	Force-On input, active-high; drive high to override AutoShutdown Plus, keeping transmitters and receivers on (FORCEOFF must be high).
13	T1OUT	output	RS-232 transmitter output; T_OUT is rated ±13.2V to GND and the outputs go high-impedance when disabled, and can be driven to ±12V when powered off or shut down.
14	GND	power_in	Ground.
15	VCC	power_in	Single supply voltage, +3.0V to +5.5V.
16	FORCEOFF	input	Force-Off input, active-low; when low, transmitters are in high impedance, charge pumps are shut down, and receivers are active, overriding AutoShutdown Plus and FORCEON.

Key specifications

Parameter	Value
Manufacturer	Maxim Integrated
Package	SSOP-16-208mil
Category	Interface ICs
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, AutoShutdown Plus			1	10	μA	FORCEON = GND, FORCEOFF = VCC, all R_IN idle, all T_IN idle	6
Supply Current, Shutdown			1	10	μA	FORCEOFF = GND	6
Supply Current, AutoShutdown Plus Disabled			0.3	1	mA	FORCEON = FORCEOFF = VCC, no load	6
Input Logic Threshold Low				0.8	V	T_IN, FORCEON, FORCEOFF	6
Input Logic Threshold High		2			V	VCC = 3.3V	6
Input Logic Threshold High		2.4			V	VCC = 5.0V	6
Input Leakage Current		-1	0.01	1	μA	T_IN, FORCEON, FORCEOFF	6
Output Voltage Low (R_OUT)				0.4	V	IOUT = 1.6mA	6
Output Voltage Low (INVALID, READY)				0.4	V	IOUT = -1.6mA	7
Input Voltage Range		-25		25	V		6
Input Threshold Low		0.6	1.2		V	TA = +25°C, VCC = 3.3V	6
Input Threshold Low		0.8	1.5		V	TA = +25°C, VCC = 5.0V	6
Input Threshold High		1.5	2.4		V	TA = +25°C, VCC = 3.3V	6
Input Threshold High		1.8	2.4		V	TA = +25°C, VCC = 5.0V	6
Input Resistance		3	5	7	kΩ	TA = +25°C	6
Output Voltage Swing		-5	5.4	5	V	All transmitter outputs loaded with 3kΩ to ground	6
Output Resistance		300			Ω	VCC = V+ = V- = 0V, transmitter outputs = ±2V	6
Output Resistance				10	MΩ	VCC = V+ = V- = 0V, transmitter outputs = ±2V	6
Output Short-Circuit Current		-60		60	mA		6
Output Leakage Current (transmitter outputs)		-25		25	µA	VCC = 0V or 3V to 5.5V, VOUT = ±12V, Transmitters disabled	6
ESD IEC 1000-4-2 Air Discharge (R_IN, T_OUT)		-15		15	kV		7
ESD IEC 1000-4-2 Contact Discharge (R_IN, T_OUT)		-8		8	kV		7
ESD Human Body Model (R_IN, T_OUT)		-15		15	kV		7
Receiver Input Threshold to INVALID Output Low		-0.3		0.3	V	FORCEON = GND, FORCEOFF = VCC, Figure 4a	7
Receiver Positive or Negative Threshold to INVALID High	tINVH			1	μs	VCC = 5V, Figure 4b	7
Receiver Positive or Negative Threshold to INVALID Low	tINVL			30	μs	VCC = 5V, Figure 4b	7
Receiver or Transmitter Edge to Transmitters Enabled	tWU			100	μs	VCC = 5V, Figure 5b (Note 2)	7
Receiver or Transmitter Edge to Transmitters Shutdown	tAUTOSHDN	15	30	60	s	VCC = 5V, Figure 5b (Note 2)	7
Maximum Data Rate		1000			kbps	VCC = 3.0V to 4.5V, RL = 3kΩ, CL = 250pF, one transmitter switching	8
Receiver Propagation Delay	tPHL			0.15	μs	R_IN to R_OUT, CL = 150pF	8
Transmitter Skew	│tPHL - tPLH│			25	ns	Note 3	8
Receiver Skew	│tPHL - tPLH│			50	ns		8
Transition-Region Slew Rate		24		150	V/μs	VCC = 3.3V, TA = +25°C, RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF, measured from +3V to -3V or -3V to +3V, one transmitter switching	8
VCC to GND	VCC	-0.3		6	V		2
V+ to GND	V+	-0.3		7	V	Note 1	2
V- to GND	V-	-7		0.3	V	Note 1	2
V+ + /V-/				13	V	Note 1	2
Input Voltages T_IN, FORCEON, FORCEOFF to GND		-0.3		6	V		2
Input Voltage R_IN to GND		-25		25	V		2
Output Voltage T_OUT to GND		-13.2		13.2	V		2
Output Voltage R_OUT, INVALID, READY to GND		-0.3			V		2
Storage Temperature Range		-65		160	°C		2
Lead Temperature (soldering, 10s)				300	°C	soldering, 10s	2
Soldering Temperature (reflow)				260	°C		2
Supply Voltage (VCC)	VCC	3		5.5	V		6
Operating Temperature Range (EC)	TA	0		70	°C	MAX32__EC__ grade	2
Input Hysteresis (transmitter input)			0.5		V		6
Receiver Input Threshold to INVALID Output High (positive)			2.7		V	FORCEON = GND, FORCEOFF = VCC, Figure 4a	7
Receiver Input Threshold to INVALID Output High (negative)			-2.7		V	FORCEON = GND, FORCEOFF = VCC, Figure 4a	7
Thermal Resistance Junction to Ambient (θJA)	θJA		140		°C/W	Single layer board, 16-SSOP	2
Thermal Resistance Junction to Case (θJC)	θJC		34		°C/W	Single layer board, 16-SSOP	2
Thermal Resistance Junction to Ambient (θJA)	θJA		86		°C/W	Four-layer board, 16-SSOP	2
Thermal Resistance Junction to Case (θJC)	θJC		33		°C/W	Four-layer board, 16-SSOP	2

CAD (KiCad official)

Symbol: MAX3227ECAE+T
Footprint: Package_SO:SSOP-16_5.3x6.2mm_P0.65mm
3D model: SSOP-16-208mil (KiCad packages3D, STEP)
3D model files: max3227ecae-t-etched.step / max3227ecae-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max3227ecae-t.step / max3227ecae-t.glb are the bare package body.

Provenance

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

Datasheet: Maxim Integrated datasheet (25 pp, sha256 8542587c6f3a36a5, retrieved 2026-10-31, tier: manufacturer)
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

MAX3227ECAE+T

Verified MAX3227ECAE+T

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3D Model

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