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Texas Instruments ISO7731QDBQQ1 — Digital Isolators

TI ISO7731QDBQQ1 Digital Isolator, 3-Ch, 100Mbps, 3000Vrms

MPNISO7731QDBQQ1
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Texas Instruments ISO7731QDBQQ1, Automotive AEC-Q100, General Purpose digital isolator, 3 unidirectional channels, 100Mbps data rate, 3000Vrms isolation, capacitive coupling, 2.25V~5.5V supply, 16-SSOP package, -40°C~125°C.

$3.1600Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ISO7731QDBQQ1 specifications
ParameterValue
TypeGeneral Purpose
SeriesAutomotive, AEC-Q100
Channel typeUnidirectional
MountingSurface Mount
Supply voltage2.25V ~ 5.5V
Voltage - isolation3000Vrms
Isolated powerNo
Operating temperature-40°C~125°C
Pulse width distortion4.9ns
PackageTube
Data rate100Mbps
TechnologyCapacitive Coupling
Case16-SSOP (0.154\", 3.90mm Width)
Channels3
Inputs - side 1/Side 22/1
Rise (Fall time)1.3ns, 1.4ns
Propagation delay tpLH (tpHL)16ns, 16ns
Common mode transient immunity85kV/µs

Product details

3000Vrms isolation with 85kV/µs CMTI — built for noisy automotive rails

The 100Mbps data rate covers isolated SPI, UART, and CAN FD signaling without adding propagation delay — max 16ns each direction — and the 85kV/µs minimum common-mode transient immunity keeps the link clean when an inverter phase switches or a relay coil kicks.

Supply range and channel direction — what the 2/1 split means

Two channels run from Side 1 to Side 2, one channel runs from Side 2 to Side 1 — a 2/1 input split that suits a typical SPI isolation interface (SCLK, MOSI forward; MISO return) or a CAN transceiver isolation barrier with TX and RX on separate sides. The supply range spans 2.25V to 5.5V on each side independently, so you can mate a 3.3V MCU domain on one side with a 5V transceiver or sensor rail on the other without a level shifter.

Package and footprint — 16-SSOP, surface-mount only

Frequently asked questions

Is the ISO7731QDBQQ1 suitable for automotive applications?

Yes.

What is the data rate and propagation delay of the ISO7731QDBQQ1?

It supports a 100Mbps data rate with a maximum propagation delay of 16ns in both directions (tpLH and tpHL). Pulse-width distortion is limited to 4.9ns max.