Digital Isolator ICs

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Compare channel direction, supply rails, isolation ratings and integrated power. Review manufacturer datasheets, then send your exact part numbers or BOM to ApexComponent.

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Signal isolation and power isolation are separate selections.

Channel direction reference3 forward / 1 reverse

Logic domain AVDD1 / GND1

Logic domain BVDD2 / GND2

IN AOUT A

IN BOUT B

IN COUT C

OUT DIN D

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Signal flow illustration. Refer to the selected device's pinout and power requirements.

Start with your channel configuration

Count signals in both directions. F means A → B; R means B → A.

Need I²C or USB isolation? ↗

1CH1F / 0ROne logic signal 2CH2F / 0R · 1F / 1RTwo signal paths 3CH2F / 1RThree signal paths 4CH4F / 0R · 3F / 1R · 2F / 2RFour signal paths 6CH4F / 2RAdditional control signals

Opposing unidirectional channels are different from the open-drain bidirectional channels used by I²C.

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Manufacturer-based reference parts for your RFQ. Confirm availability and commercial terms with your request.

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Compare 16 exact digital isolator ordering codes. Values are manufacturer references, not inventory or approved substitutions.
Part / manufacturer	Direction	Supply	Isolation withstand	Rate	Power	Package	Datasheet / RFQ
ISO7710DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 11 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	1F / 0R1 channel	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ADUM1200ARZ-RL7Analog DevicesGeneral purpose Device details Package code R-8 Insulation Review manufacturer safety table CMTI 25 kV/µs min; 35 kV/µs typ; see test conditions. Delay 150 ns max at 5 V, A grade; see loading and supply conditions. Temperature −40 to +105 °C Default / startup See truth table and power-up / power-down behavior. Power VDD1 and VDD2: independent 2.7–5.5 V supplies. The A-grade ordering code is rated at 1 Mbps. Other speed grades have different limits. View product listing ↗	2F / 0R2 channels	2.7–5.5 VSupply on each side	2.5 kVrmsVISO · 60 s test	1 Mbps max · A gradeExact ordering variant	ExternalIsolated-side supply	SOIC-8 narrowR-8	Datasheet ↗Product page ↗
ADUM1201ARZ-RL7Analog DevicesGeneral purpose Device details Package code R-8 Insulation Review manufacturer safety table CMTI 25 kV/µs min; 35 kV/µs typ; see test conditions. Delay 150 ns max at 5 V, A grade; see loading and supply conditions. Temperature −40 to +105 °C Default / startup See truth table and power-up / power-down behavior. Power VDD1 and VDD2: independent 2.7–5.5 V supplies. The A-grade ordering code is rated at 1 Mbps. Other speed grades have different limits. View product listing ↗	1F / 1R2 channels	2.7–5.5 VSupply on each side	2.5 kVrmsVISO · 60 s test	1 Mbps max · A gradeExact ordering variant	ExternalIsolated-side supply	SOIC-8 narrowR-8	Datasheet ↗Product page ↗
ADUM1250ARZAnalog DevicesI²C interface Device details Package code R-8 Insulation Review manufacturer safety table CMTI 25 kV/µs min; 35 kV/µs typ; see test conditions. Delay See directional I²C timing table and the intended bus loading. Temperature −40 to +105 °C Default / startup See truth table and power-up / power-down behavior. Power VDD1 and VDD2: 3.0–5.5 V. Check the distinct Side 1 and Side 2 logic thresholds and pull-ups. Two bidirectional, open-drain channels for SDA and SCL. Supports clock stretching; check bus loading, pull-ups and VOL compatibility. View product listing ↗	2 bidirectionalSDA + SCL	3.0–5.5 VSupply on each side	2.5 kVrmsVISO · 60 s test	1 MHz I²C clockClock rate; not a generic bit rate	ExternalIsolated-side supply	SOIC-8 narrowR-8	Datasheet ↗Product page ↗
ISO7720DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 11 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	2F / 0R2 channels	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ISO7721DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 11 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	1F / 1R2 channels	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ISO7731DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 11 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	2F / 1R3 channels	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ADUM1401ARWZAnalog DevicesGeneral purpose Device details Package code RW-16 Insulation Review manufacturer safety table CMTI 25 kV/µs min; 35 kV/µs typ; see test conditions. Delay 100 ns max at 5 V, A grade; see loading and supply conditions. Temperature −40 to +105 °C Default / startup See truth table and power-up / power-down behavior. Power VDD1 and VDD2: independent 2.7–5.5 V supplies. The A-grade ordering code is rated at 1 Mbps. Other speed grades have different limits. View product listing ↗	3F / 1R4 channels	2.7–5.5 VSupply on each side	2.5 kVrmsVISO · 60 s test	1 Mbps max · A gradeExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideRW-16	Datasheet ↗Product page ↗
ADUM1402ARWZAnalog DevicesGeneral purpose Device details Package code RW-16 Insulation Review manufacturer safety table CMTI 25 kV/µs min; 35 kV/µs typ; see test conditions. Delay 100 ns max at 5 V, A grade; see loading and supply conditions. Temperature −40 to +105 °C Default / startup See truth table and power-up / power-down behavior. Power VDD1 and VDD2: independent 2.7–5.5 V supplies. The A-grade ordering code is rated at 1 Mbps. Other speed grades have different limits. View product listing ↗	2F / 2R4 channels	2.7–5.5 VSupply on each side	2.5 kVrmsVISO · 60 s test	1 Mbps max · A gradeExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideRW-16	Datasheet ↗Product page ↗
ADUM5401ARWZAnalog DevicesSignal + isolated power Device details Package code RW-16 Insulation Review manufacturer safety table CMTI 25 kV/µs min; 35 kV/µs typ; see test conditions. Delay 100 ns max at 5 V, A grade; see switching conditions. Temperature −40 to +105 °C Default / startup See truth table and power-up / power-down behavior. Power Supported nominal input / isolated output combinations: 5 V → 5 V, 5 V → 3.3 V, 3.3 V → 3.3 V. Check regulation, load and input limits. Integrated isoPower DC-DC. A grade: 1 Mbps. Available isolated output power depends on the supply configuration and temperature. View product listing ↗	3F / 1R4 channels	3.3 V / 5 V inputSee power combinations	2.5 kVrmsVISO · 60 s test	1 Mbps max · A gradeExact ordering variant	IntegratedIsolated DC-DC	SOIC-16 wideRW-16	Datasheet ↗Product page ↗
ISO7740DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 10.7 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	4F / 0R4 channels	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ISO7741DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 10.7 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	3F / 1R4 channels	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ISO7742DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 10.7 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	2F / 2R4 channels	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ISOW7741DFMRTexas InstrumentsSignal + isolated power Device details Package code DFM Insulation Reinforced; non-B DFM variant CMTI 85 kV/µs min; 100 kV/µs typ Delay See switching characteristics for the chosen VIO and isolated supply. Temperature −40 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VIO: 1.71–5.5 V; converter VDD: 3–5.5 V. Isolated output: 3.3 V or 5 V; see supported combinations and load limits. Integrated isolated DC-DC converter. Output load capability depends on input / output configuration; review thermal and EMI requirements. View product listing ↗	3F / 1R4 channels	VIO 1.71–5.5 VSee power combinations	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	IntegratedIsolated DC-DC	SOIC-20 wideDFM	Datasheet ↗Product page ↗
ISO7762DWRTexas InstrumentsGeneral purpose Device details Package code DW Insulation Reinforced; DW package CMTI 85 kV/µs min; 100 kV/µs typ Delay 11 ns typ at 5 V; check maximum over your conditions. Temperature −55 to +125 °C Default / startup High on input signal/power loss; see functional modes. Power VCC1 and VCC2: independent 2.25–5.5 V supplies. Non-F catalog variant. Verify the complete suffix, timing conditions and package safety table. View product listing ↗	4F / 2R6 channels	2.25–5.5 VSupply on each side	5 kVrmsVISO · 60 s test	100 Mbps maxExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideDW	Datasheet ↗Product page ↗
ADUM3160WBRWZ-RLAnalog DevicesUSB interface Device details Package code RW-16 Insulation Review manufacturer safety table CMTI 25 kV/µs min; 35 kV/µs typ; see test conditions. Delay Full-speed propagation delay: 70 ns max under the specified conditions. Temperature −40 to +105 °C Default / startup USB direction control; see startup, speed selection and enumeration requirements. Power Each side: VBUS 4.5–5.5 V with internal LDO, or direct 3.3 V with VBUS and VDD configured as specified. Downstream power is supplied separately. USB low / full speed only. Set the intended speed as specified; this is not a 480 Mbps high-speed isolator. Internal LDOs do not transfer power across the barrier. View product listing ↗	USB D+ / D−Low / full speed	5 V bus / 3.3 V directSeparate supply each side	2.5 kVrmsVISO · 60 s test	USB 1.5 / 12 MbpsExact ordering variant	ExternalIsolated-side supply	SOIC-16 wideRW-16	Datasheet ↗Product page ↗

VISO is a short-duration withstand test, not the continuous working voltage. Speed, insulation and package ratings apply to the exact ordering code. Open Device details for timing conditions and sourcing checks.

Check the barrier. Then check the power.

Use these four steps before approving a part or an alternative.

Signal direction

Count forward and reverse signals, including clocks, data, enable and return paths. For SPI, review the complete interface and timing budget.

Insulation requirements

Match working voltage, insulation type, surge requirements, creepage and clearance to the system. Review the exact package's safety documentation.

Logic and timing

Check each side's supply and input thresholds, maximum propagation delay, skew and CMTI. Keep typical and guaranteed limits separate.

Isolated-side power

Choose an external isolated supply or a part with an integrated isolated DC-DC converter. Check output load, startup, thermal limits and EMI.

Signal isolator + external power

Logic→Isolation→Logic

Each side has its own supply. Internal regulators on a device do not necessarily transfer energy across the barrier.

Signal isolator + integrated DC-DC

Signal + power→Isolation→Powered side

Power crosses the barrier through the integrated converter. Specify the input / output voltage combination and available load.

Compare integrated-power references ↗

Manufacturer references: TI digital isolator design guide ↗ · Analog Devices safety documentation ↗

Match the isolator to the interface

Choose the signal function before comparing channel count.

GPIO / PWM / SPI / UART

General-purpose digital signals

Use the required channel directions and logic rails. Check clock / data delay, skew and startup states against your circuit.

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I²C / SMBus

Bidirectional open-drain signals

ADUM1250ARZ provides two bidirectional channels. Review pull-ups, VOL, bus capacitance, clock stretching and the maximum I²C clock.

View I²C reference ↗

USB

Protocol-specific USB isolation

ADUM3160WBRWZ-RL supports low and full speed at 1.5 / 12 Mbps. Review speed configuration, enumeration and power on each side.

View USB reference ↗

CAN and RS-485 bus drivers, isolated gate drivers and analog isolation devices serve different signal functions. Specify the interface in your inquiry.

Small suffix.
Different device.

Keep the complete manufacturer ordering code in your BOM and RFQ.

Speed grade and timing

ADUM1201ARZ-RL7 is a 1 Mbps A-grade part. The same family contains faster grades with different timing limits.

Package and default output

ISO7741DWR and the F-suffix variant have different default output behavior. DW and DBQ packages have different isolation and physical dimensions.

Alternative review

Compare pinout, direction, supply, timing, output state, package and insulation evidence. Include engineering-approved alternatives in the request.

Digital isolator questions

Practical answers for selection and purchasing.

What does a digital isolator do?

It transfers digital information between electrically separated circuit domains. A general-purpose digital isolator carries logic signals; protocol-specific isolators add the circuitry needed for interfaces such as I²C or USB.

What does 3F / 1R mean?

It means three signals travel from Side 1 to Side 2, and one travels in the reverse direction. These are four unidirectional channels. They are different from a single channel that automatically supports bidirectional, open-drain communication.

Does 5 kVrms isolation mean a 5 kV continuous working voltage?

No. The VISO figure in this table is a short-duration withstand rating. Review VIOWM / VIORM, insulation classification, surge ratings, package spacing and the applicable system requirements separately.

Does every digital isolator include isolated power?

No. Most general-purpose signal isolators require power on both sides. ISOW7741DFMR and ADUM5401ARWZ include an isolated DC-DC converter; their usable load depends on operating conditions. Internal LDO regulators alone are not an isolated power converter.

Can a standard two-channel isolator replace an I²C or USB isolator?

Do not select only by channel count. I²C requires the appropriate open-drain direction handling and logic thresholds. USB has protocol and speed requirements. Choose a device or circuit explicitly suited to the required interface.

Can I replace an optocoupler or another digital isolator directly?

Review electrical interface, pin assignment, supply, timing, startup / default output, package and insulation requirements. A similar function or footprint does not establish interchangeability. Send the original full MPN and approved replacement requirements.

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Or the requirements.

Add reference parts to a list, set quantities and include the conditions your design needs.

Full MPN, manufacturer and quantity
Signal directions, interface and supply rails
Working voltage, insulation and package needs
Speed, temperature and approved alternatives

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Copy your list into the inquiry form, or upload the downloaded TXT with your BOM. Submit the request on the inquiry page.

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