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Texas Instruments ISO6731DWR — Digital Isolators
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Texas Instruments / Digital Isolators

TI ISO6731DWR Digital Isolator, 3-Ch, 50Mbps, 5000Vrms

MPN ISO6731DWR
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Texas Instruments ISO6731DWR general-purpose triple-channel digital isolator, capacitive coupling, 50Mbps data rate, 5000Vrms isolation, 2.25V to 5.5V supply, -40°C to 125°C, 16-SOIC package.

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[SPEC] Essential Parameters Snapshot Full Specifications (17)
Package / Case 16-SOIC (0.295", 7.50mm Width)
Supply Voltage 2.25V ~ 5.5V

Full Technical Specifications

17 Parameters
ISO6731DWR specifications
Parameter / AttributeSpecification / Value
TypeCAN, RS232, RS485, SPI
Channel typeUnidirectional
MountingSurface Mount
Supply voltage2.25V ~ 5.5V
Voltage - isolation5000Vrms
Isolated powerNo
Operating temperature-40°C ~ 125°C
Pulse width distortion7ns
PackageTape & Reel (TR); Cut Tape (CT)
Data rate50Mbps
TechnologyCapacitive Coupling
Case16-SOIC (0.295\", 7.50mm Width)
Channels3
Inputs - side 1/Side 23/0
Rise (Fall time)2.6ns, 2.6ns
Propagation delay tpLH (tpHL)18ns, 18ns
Common mode transient immunity50kV/µs
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Technical Details & Description

Three forward-only channels at 50 Mbps with 5 kV isolation

The ISO6731DWR: Triple-channel digital isolator using capacitive coupling. Supports CAN, RS232, RS485, and SPI at 50 Mbps. Propagation delay is 18 ns max; pulse-width distortion is 7 ns max.

The ISO6742DWR also raises the minimum CMTI to 100 kV/µs, doubling the transient immunity margin for the same 50 Mbps data rate and 5000 Vrms isolation. If your application sees heavy common-mode transients — say, from IGBT switching — the higher CMTI gives extra noise margin without changing the package or supply voltage.

16-pin SOIC wide-body package, 7.50 mm body width, surface-mount.

Frequently asked questions

Where can I find the ISO6731DWR datasheet?

The TI ISO6731DWR datasheet is available on the Texas Instruments website and through major distributor portals. It covers the full electrical specifications, isolation ratings, application circuits, and layout guidelines for maintaining creepage and clearance.

What is the equivalent or replacement for ISO6731DWR?

The ISO6731FQDWRQ1 is a pin-compatible, AEC-Q100 qualified variant with the same channel configuration, data rate, and isolation rating. For designs needing bidirectional channels, the ISO6742DWR provides a 2/2 input/output split across four channels at the same 50 Mbps and 5000 Vrms.

Is ISO6731DWR compatible with 3.3V and 5V?

Yes, the supply voltage range of 2.25 V to 5.5 V covers both 3.3 V and 5 V logic families on either side of the isolation barrier, with no external level shifter needed.

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