ADM3222ARWZ from Analog Devices, in a SOIC-18-300mil. 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	EN	input	Receiver enable, active low: receiver outputs are enabled when low and three-stated when high.
2	C1+	passive	External capacitor 1 connects between C1+ and C1-; 0.1 μF recommended, larger up to 47 μF can be used.
3	V+	power_out	Internally generated positive supply (+6 V nominal).
4	C1-	passive	External capacitor 1 connects between C1+ and C1-; 0.1 μF recommended, larger up to 47 μF can be used.
5	C2+	passive	External capacitor 2 connects between C2+ and C2-; 0.1 μF recommended, larger up to 47 μF can be used.
6	C2-	passive	External capacitor 2 connects between C2+ and C2-; 0.1 μF recommended, larger up to 47 μF can be used.
7	V-	power_out	Internally generated negative supply (−6 V nominal).
8	T2OUT	output	Transmitter (driver) 2 output at RS-232 signal levels (typically ±9 V).
9	R2IN	input	Receiver 2 input accepting RS-232 levels, with internal 5 kΩ pull-down to GND and ±30 V overvoltage protection.
10	R2OUT	output	Receiver 2 output at CMOS logic levels.
11	T2IN	input	Transmitter (driver) 2 input accepting TTL/CMOS levels.
12	T1IN	input	Transmitter (driver) 1 input accepting TTL/CMOS levels.
13	R1OUT	output	Receiver 1 output at CMOS logic levels.
14	R1IN	input	Receiver 1 input accepting RS-232 levels, with internal 5 kΩ pull-down to GND and ±30 V overvoltage protection.
15	T1OUT	output	Transmitter (driver) 1 output at RS-232 signal levels (typically ±9 V).
16	GND	power_in	Ground pin, must be connected to 0 V.
17	VCC	power_in	Power supply input (3.3 V ± 0.3 V).
18	SD	input	Shutdown control, active low: when low the charge pump is shut down and the transmitter outputs are disabled.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	SOIC-18-300mil
Category	Communication Interface Chip/UART/485/232
Pins	18

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Operating Voltage Range	VCC	3	3.3	5.5	V		3
VCC Power Supply Current (no load)			1.3	3	mA	No load	3
VCC Power Supply Current (loaded)			8	12	mA	RL = 3 kΩ to GND	3
Shutdown Supply Current			0.01	0.5	μA		3
Input Logic Threshold Low	VINL			0.8	V	TIN	3
Input Logic Threshold High	VINH	2			V	TIN	3
CMOS Output Voltage Low	VOL			0.4	V	IOUT = 1.6 mA	3
Logic Pull-Up Current			5	10	μA	TIN = GND to VCC	3
Output Leakage Current (receivers disabled)		-10		10	μA	Receivers disabled	3
EIA-232 Input Voltage Range		-30		30	V		3
EIA-232 Input Threshold Low		0.6	1.2		V		3
EIA-232 Input Threshold High			1.6	2.4	V		3
EIA-232 Input Resistance		3	5	7	kΩ		3
Output Voltage Swing (RS-232)		5	5.2		V	VCC = 3.3 V, all transmitter outputs loaded with 3 kΩ to ground	3
Output Leakage Current (transmitter)		-25		25	μA	SD = low, VOUT = 12 V	3
Maximum Data Rate		460			kbps	VCC = 3.3 V, RL = 3 kΩ to 7 kΩ, CL = 50 pF to 1000 pF, one Tx switching	3
Receiver Propagation Delay TPHL	TPHL		0.4	1	μs		3
Receiver Propagation Delay TPLH	TPLH		0.4	1	μs		3
Transmitter Propagation Delay			0.3	1.2	μs	RL = 3 kΩ, CL = 1000 pF	3
Transition Region Slew Rate		5.5	10	30	V/μs	Measured from +3 V to −3 V or −3 V to +3 V, VCC = +3.3 V; RL = 3 kΩ, CL = 1000 pF, TA = 25°C	3
Output Voltage Swing (RS-562)			3.7		V	VCC = 3.0 V	3
EIA-232 Input Hysteresis			0.4		V		3
Transmitter Output Resistance			300		Ω	VCC = 0 V, VOUT = ±2 V	3
RS-232 Output Short-Circuit Current			15		mA		3
Receiver Output Enable Time			200		ns		3
Receiver Output Disable Time			200		ns		3
Transmitter Skew			30		ns		3
Receiver Skew			300		ns		3
VCC Supply Voltage	VCC	-0.3		6	V	TA = 25°C	4
V+ Voltage	V+			14	V	(VCC − 0.3 V) to +14 V	4
V− Voltage	V−	-14			V	+0.3 V to -14 V	4
RIN Input Voltage	RIN	-30		30	V		4
TOUT Output Voltage	TOUT	-15		15	V		4
Power Dissipation				450	mW	Derates 6 mW/°C above 50°C	4
Thermal Impedance θJA RW-18	θJA		56		°C/W	RW-16/RW-18 (4-Layer Test Board)	4
Operating Temperature Range		-40		85	°C	Industrial (A Version)	4
Storage Temperature Range		-65		150	°C		4

CAD (KiCad official)

Symbol: ADM3222ARWZ
Footprint: Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm
3D model: SOIC-18-300mil (KiCad packages3D, STEP)
3D model files: adm3222arwz-etched.step / adm3222arwz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); adm3222arwz.step / adm3222arwz.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (16 pp, sha256 cd33ca7a96faf2c0, retrieved 2026-10-30, 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

ADM3222ARWZ

Verified ADM3222ARWZ

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3D Model

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