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ISO7421FEDR

ISO7421FEDR digital isolator, 50 Mbps, 2500 Vrms, 8-SOIC

MPNISO7421FEDR
End of Life

Texas Instruments ISO7421FEDR general-purpose digital isolator, capacitive coupling, 2 unidirectional channels, 50 Mbps data rate, 2500 Vrms isolation, 3 V to 5.5 V supply, 8-SOIC package, -40°C to 125°C.

$3.43Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ISO7421FEDR specifications
ParameterValue
TypeGeneral Purpose
Channel typeUnidirectional
MountingSurface Mount
Voltage3V ~ 5.5V
Voltage - isolation2500Vrms
Isolated powerNo
Operating temperature-40°C ~ 125°C
Pulse width distortion3.7ns
PackageTape & Reel (TR); Cut Tape (CT)
Data rate50Mbps
TechnologyCapacitive Coupling
Case8-SOIC (0.154\", 3.90mm Width)
Channels2
Inputs - side 1/Side 21/1
Rise (Fall time)1.8ns, 1.7ns
Propagation delay tpLH (tpHL)11ns, 11ns
Common mode transient immunity25kV/µs

Product details

50 Mbps capacitive-coupled isolator in 8-SOIC

It provides two unidirectional channels with one input on side 1 and one on side 2, making it a straightforward fit for isolating a single TX and RX line in SPI, UART, or GPIO isolation. The 50 Mbps data rate handles most industrial serial buses without timing margin concerns, and the 11 ns max propagation delay keeps the signal path tight for feedback loops.

CMTI and signal integrity

The 1.8 ns typical rise and 1.7 ns fall times keep the output edges clean, and the 3.7 ns max pulse-width distortion means the duty cycle stays close to 50% — important for PWM isolation where pulse symmetry matters.

Frequently asked questions

What is the data rate of ISO7421FEDR?

The maximum data rate is 50 Mbps, which supports SPI, UART, and general-purpose digital isolation at common industrial bus speeds.

What is the difference between ISO7421 and ISO7421FEDR?

The ISO7421FEDR is the lead-free (ROHS3 compliant) variant of the ISO7421 base part. Functionally they are identical — same 50 Mbps data rate, 2500 Vrms isolation, and 8-SOIC package.