ADUM3221BRZ from Analog Devices, in a SOIC-8. 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	VDD1	power_in	Supply voltage for isolator side 1, specified at 3.0 V to 5.5 V.
2	VIA	input	Logic Input A on the side 1 input; CMOS logic high threshold is 0.7 × VDD1 and low threshold is 0.3 × VDD1 per the electrical characteristics.
3	VIB	input	Logic Input B on the side 1 input; CMOS logic high threshold is 0.7 × VDD1 and low threshold is 0.3 × VDD1 per the electrical characteristics.
4	GND1	power_in	Ground reference for isolator side 1.
5	GND2	power_in	Ground reference for isolator side 2.
6	VOB	output	Logic Output B on the side 2 output; logic low output is specified at 0.15 V maximum at IOx = +20 mA and logic high is VDD2 − 0.1 V minimum at IOx = −20 mA.
7	VOA	output	Logic Output A on the side 2 output; logic low output is specified at 0.15 V maximum at IOx = +20 mA and logic high is VDD2 − 0.1 V minimum at IOx = −20 mA.
8	VDD2	power_in	Supply voltage for isolator side 2, specified at 4.5 V to 18 V in the pin function table.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	SOIC-8
Category	Power Supply Chip
Pins	8

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Input Supply Current, Two Channels, Quiescent (5 V operation table)	IDDI(Q)		1.2	1.5	mA		3
Output Supply Current, Two Channels, Quiescent	IDDO(Q)		4.7	10	mA		3
VDD1 Supply Current (5 V operation table)	IDD1(Q)		1.4	1.7	mA	DC to 1 MHz logic signal frequency	3
VDD2 Supply Current	IDD2(Q)		11	17	mA	DC to 1 MHz logic signal frequency	3
Input Currents	IIA, IIB	-10	0.01	10	µA	0 V ≤ VIA, VIB ≤ VDD1	3
Logic Low Output Voltages	VOAL, VOBL	0		0.15	V	IOx = +20 mA, VIx = VIxL	3
Undervoltage Lockout VDD2 Positive-Going Threshold (ADuM3221B)	VDD2UV+	7	7.5		V		3
Undervoltage Lockout VDD2 Negative-Going Threshold (ADuM3221B)	VDD2UV−	6	6.5		V		3
Undervoltage Lockout VDD2 Hysteresis (ADuM3221B)	VDD2UVH		0.5		V		3
Output Short-Circuit Pulsed Current	IOA(SC), IOB(SC)	2	4		A	VDD2 = 10 V	3
Output Pulsed Source Resistance	ROA, ROB	0.3	1.3	3	Ω	VDD2 = 10 V	3
Output Pulsed Sink Resistance	ROA, ROB	0.3	0.9	3	Ω	VDD2 = 10 V	3
Pulse Width	PW	50			ns	CL = 2 nF, VDD2 = 10 V	3
Data Rate				1	MHz	CL = 2 nF, VDD2 = 10 V	3
Propagation Delay (5 V operation table, VDD2 = 10 V)	tDLH, tDHL	35	45	60	ns	CL = 2 nF, VDD2 = 10 V; see Figure 20	3
Propagation Delay (5 V operation table, VDD2 = 4.5 V)	tDLH, tDHL	36	50	68	ns	CL = 2 nF, VDD2 = 4.5 V; see Figure 20	3
Propagation Delay Skew	tPSK			12	ns	CL = 2 nF, VDD2 = 10 V; see Figure 20	3
Channel-to-Channel Matching (VDD2 = 10 V)	tPSKCD		1	5	ns	CL = 2 nF, VDD2 = 10 V; see Figure 20	3
Channel-to-Channel Matching (VDD2 = 4.5 V)	tPSKCD		1	7	ns	CL = 2 nF, VDD2 = 4.5 V; see Figure 20	3
Output Rise/Fall Time (10% to 90%), VDD2 = 10 V	tR/tF	14	20	25	ns	CL = 2 nF, VDD2 = 10 V; see Figure 20	3
Output Rise/Fall Time (10% to 90%), VDD2 = 4.5 V	tR/tF	14	22	28	ns	CL = 2 nF, VDD2 = 4.5 V; see Figure 20	3
Dynamic Input Supply Current per Channel (5 V operation table)	IDDI(D)		0.05		mA/Mbps	VDD2 = 10 V	3
Dynamic Output Supply Current per Channel	IDDO(D)		1.5		mA/Mbps	VDD2 = 10 V	3
Refresh Rate (5 V operation table)	fr		1.2		Mbps		3
Input Supply Current, Two Channels, Quiescent (3.3 V operation table)	IDDI(Q)		0.7	1	mA		4
VDD1 Supply Current (3.3 V operation table)	IDD1(Q)		0.8	1	mA	DC to 1 MHz logic signal frequency	4
Propagation Delay (3.3 V operation table, VDD2 = 10 V)	tDLH, tDHL	36	48	62	ns	CL = 2 nF, VDD2 = 10 V; see Figure 20	4
Propagation Delay (3.3 V operation table, VDD2 = 4.5 V)	tDLH, tDHL	37	53	72	ns	CL = 2 nF, VDD2 = 4.5 V; see Figure 20	4
Dynamic Input Supply Current per Channel (3.3 V operation table)	IDDI(D)		0.025		mA/Mbps	VDD2 = 10 V	4
Refresh Rate (3.3 V operation table)	fr		1.1		Mbps		4
Operating Junction Temperature	TJ	-40		125	°C		6
Supply Voltage VDD1	VDD1	3		5.5	V	All voltages relative to their respective ground	6
Supply Voltage VDD2	VDD2	4.5		18	V	All voltages relative to their respective ground	6
VDD1 Rise Time	tVDD1			1	V/µs		6
Common-Mode Transient Immunity, Input to Output		-25		25	kV/µs		6
Input Signal Rise and Fall Times				1	ms		6
Minimum VDD2 Operating Voltage (ADuM3221BRZ, per ordering guide)	VDD2	7.6			V	B grade variant	15
Storage Temperature	TST	-55		150	°C		7
Operating Temperature	TJ	-40		150	°C		7
Supply Voltage Range VDD1	VDD1	-0.5		7	V		7
Supply Voltage Range VDD2	VDD2	-0.5		20	V		7
Input Voltage Range (VIA, VIB)	VIA, VIB	-0.5			V	Upper limit printed as VDDI + 0.5 V	7
Output Voltage Range (VOA, VOB)	VOA, VOB	-0.5			V	Upper limit printed as VDDO + 0.5 V	7
Average Output Current per Pin	IO	-23		23	mA	See Figure 3 for temperature derating	7
VOA to GND2 Negative Transient	VOA	-2			V	200 ns; nonautomotive grade devices only	7
VOB to GND2 Negative Transient	VOB	-2			V	200 ns; nonautomotive grade devices only	7
Common-Mode Transients	CMH, CML	-100		100	kV/µs		7
AC Bipolar Voltage (max continuous working voltage)				565	V peak	50-year minimum lifetime	7
AC Unipolar Voltage (max continuous working voltage)				1131	V peak	50-year minimum lifetime	7
DC Voltage (max continuous working voltage)				1131	V peak	50-year minimum lifetime	7
IC Junction-to-Case Thermal Resistance, Side 1	θJCI		46		°C/W	Thermocouple located at center of package underside	5
IC Junction-to-Case Thermal Resistance, Side 2	θJCO		41		°C/W	Thermocouple located at center of package underside	5
IC Junction-to-Ambient Thermal Resistance	θJA		85		°C/W	Thermocouple located at center of package underside	5
Capacitance (Input-to-Output)	CI-O		1		pF	f = 1 MHz	5
Input Capacitance	CI		4		pF		5

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
housing	pC		limit = 5 µA). 2 In accordance with DIN V VDE V 0884-10, each ADuM3220/ADuM3221 is proof tested by applying an insulation test voltage ≥ 1050 V peak for 1 second (partial discharge detection limit = 5	5

CAD (KiCad official)

Symbol: ADUM3221BRZ
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)
3D model files: adum3221brz-etched.step / adum3221brz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); adum3221brz.step / adum3221brz.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (16 pp, sha256 9d99041c90842985, retrieved 2026-10-30, 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).

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ADUM3221BRZ

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