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Texas Instruments ISO7420FEDR — Digital Isolators

TI ISO7420FEDR Digital Isolator, 50 Mbps, 2500 Vrms, SOIC-8

MPNISO7420FEDR
End of Life

Texas Instruments ISO7420FEDR, General Purpose digital isolator, 2-channel unidirectional, 50 Mbps, 2500 Vrms isolation, capacitive coupling, 8-SOIC, -40°C to 125°C.

$3.27Ref. price · indicative, final on quote
Texas Instruments ISO7420FEDR datasheet (PDF)
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ISO7420FEDR specifications
ParameterValue
TypeGeneral Purpose
Channel typeUnidirectional
MountingSurface Mount
Voltage3V ~ 5.5V
Voltage - isolation2500Vrms
Isolated powerNo
Operating temperature-40°C ~ 125°C
Pulse width distortion3ns
PackageTape & Reel (TR); Cut Tape (CT)
Data rate50Mbps
TechnologyCapacitive Coupling
Case8-SOIC (0.154\", 3.90mm Width)
Channels2
Inputs - side 1/Side 22/0
Rise (Fall time)1.8ns, 1.7ns
Propagation delay tpLH (tpHL)11ns, 11ns
Common mode transient immunity25kV/µs

Product details

50 Mbps and 25 kV/µs CMTI — what they mean on the bench

At 50 Mbps the ISO7420FEDR keeps up with high-speed SPI clocks and UART baud rates without adding jitter. The 25 kV/µs minimum common-mode transient immunity means it holds its output state through fast voltage spikes on the isolation barrier — a spec that matters when the isolator bridges a noisy motor-drive ground and a clean controller ground. Pulse-width distortion is held to 3 ns max, so the duty cycle of a PWM signal or a Manchester-encoded data stream stays intact across the barrier.

Frequently asked questions

What is the difference between ISO7420FEDR and ISO7420FCDR?

The suffix FEDR vs FCDR indicates different packaging options — the FEDR is Tape & Reel or Cut Tape, while the FCDR is typically a different reel/tube variant. Electrically both are the same 2-channel, 50 Mbps, 2500 Vrms isolator.

What is the pinout of ISO7420FEDR?

The ISO7420FEDR uses a standard 8-SOIC pinout: pins 1 and 2 are the inputs on side 1, pins 7 and 8 are the corresponding outputs on side 2, with VCC and GND on each side (pins 4/5 and 6/3 respectively). Pin 1 is marked by a chamfer and dot on the package.

What are the equivalent components to ISO7420FEDR?

A close functional peer is the ISO7221CDR, which is also a 2-channel unidirectional isolator but runs at 25 Mbps with 42 ns propagation delay — half the speed of the ISO7420FEDR. For higher isolation or more channels, consider the ISO7830DWWR (3-channel, 100 Mbps, 5700 Vrms) or the automotive-grade ISO7741QDWRQ1 (4-channel, 100 Mbps, 5000 Vrms, AEC-Q100).

Can ISO7420FEDR replace a 3.3V digital isolator?

Yes, the ISO7420FEDR operates from 3 V to 5.5 V, so it works directly at 3.3 V without a level shifter. The 50 Mbps data rate and 2500 Vrms isolation are maintained across the full supply range.